/* Source: /css/fonts-v17.10.265.css */
/* Self-hosted Google Fonts, SIL OFL. See /fonts/v17.10.265/. */
/* cyrillic-ext */
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 100 900;
  font-display: optional;
  src: url(/fonts/v17.10.265/UcC73FwrK3iLTeHuS_nVMrMxCp50SjIa2JL7SUc.woff2) format('woff2');
  unicode-range: U+0460-052F, U+1C80-1C8A, U+20B4, U+2DE0-2DFF, U+A640-A69F, U+FE2E-FE2F;
}
/* cyrillic */
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 100 900;
  font-display: optional;
  src: url(/fonts/v17.10.265/UcC73FwrK3iLTeHuS_nVMrMxCp50SjIa0ZL7SUc.woff2) format('woff2');
  unicode-range: U+0301, U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116;
}
/* greek-ext */
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 100 900;
  font-display: optional;
  src: url(/fonts/v17.10.265/UcC73FwrK3iLTeHuS_nVMrMxCp50SjIa2ZL7SUc.woff2) format('woff2');
  unicode-range: U+1F00-1FFF;
}
/* greek */
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 100 900;
  font-display: optional;
  src: url(/fonts/v17.10.265/UcC73FwrK3iLTeHuS_nVMrMxCp50SjIa1pL7SUc.woff2) format('woff2');
  unicode-range: U+0370-0377, U+037A-037F, U+0384-038A, U+038C, U+038E-03A1, U+03A3-03FF;
}
/* vietnamese */
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 100 900;
  font-display: optional;
  src: url(/fonts/v17.10.265/UcC73FwrK3iLTeHuS_nVMrMxCp50SjIa2pL7SUc.woff2) format('woff2');
  unicode-range: U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB;
}
/* latin-ext */
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 100 900;
  font-display: optional;
  src: url(/fonts/v17.10.265/UcC73FwrK3iLTeHuS_nVMrMxCp50SjIa25L7SUc.woff2) format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
/* latin */
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 100 900;
  font-display: optional;
  src: url(/fonts/v17.10.265/UcC73FwrK3iLTeHuS_nVMrMxCp50SjIa1ZL7.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
/* cyrillic-ext */
@font-face {
  font-family: 'JetBrains Mono';
  font-style: normal;
  font-weight: 100 800;
  font-display: optional;
  src: url(/fonts/v17.10.265/tDbV2o-flEEny0FZhsfKu5WU4xD2OwG_TA.woff2) format('woff2');
  unicode-range: U+0460-052F, U+1C80-1C8A, U+20B4, U+2DE0-2DFF, U+A640-A69F, U+FE2E-FE2F;
}
/* cyrillic */
@font-face {
  font-family: 'JetBrains Mono';
  font-style: normal;
  font-weight: 100 800;
  font-display: optional;
  src: url(/fonts/v17.10.265/tDbV2o-flEEny0FZhsfKu5WU4xD_OwG_TA.woff2) format('woff2');
  unicode-range: U+0301, U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116;
}
/* greek */
@font-face {
  font-family: 'JetBrains Mono';
  font-style: normal;
  font-weight: 100 800;
  font-display: optional;
  src: url(/fonts/v17.10.265/tDbV2o-flEEny0FZhsfKu5WU4xD4OwG_TA.woff2) format('woff2');
  unicode-range: U+0370-0377, U+037A-037F, U+0384-038A, U+038C, U+038E-03A1, U+03A3-03FF;
}
/* vietnamese */
@font-face {
  font-family: 'JetBrains Mono';
  font-style: normal;
  font-weight: 100 800;
  font-display: optional;
  src: url(/fonts/v17.10.265/tDbV2o-flEEny0FZhsfKu5WU4xD0OwG_TA.woff2) format('woff2');
  unicode-range: U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB;
}
/* latin-ext */
@font-face {
  font-family: 'JetBrains Mono';
  font-style: normal;
  font-weight: 100 800;
  font-display: optional;
  src: url(/fonts/v17.10.265/tDbV2o-flEEny0FZhsfKu5WU4xD1OwG_TA.woff2) format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
/* latin */
@font-face {
  font-family: 'JetBrains Mono';
  font-style: normal;
  font-weight: 100 800;
  font-display: optional;
  src: url(/fonts/v17.10.265/tDbV2o-flEEny0FZhsfKu5WU4xD7OwE.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
/* devanagari */
@font-face {
  font-family: 'Poppins';
  font-style: normal;
  font-weight: 600;
  font-display: optional;
  src: url(/fonts/v17.10.265/pxiByp8kv8JHgFVrLEj6Z11lFc-K.woff2) format('woff2');
  unicode-range: U+0900-097F, U+1CD0-1CF4, U+1CF7-1CF9, U+200C-200D, U+20A8, U+20B9, U+20F0, U+25CC, U+A830-A839, U+A8E0-A8FF, U+11B00-11B0A;
}
/* latin-ext */
@font-face {
  font-family: 'Poppins';
  font-style: normal;
  font-weight: 600;
  font-display: optional;
  src: url(/fonts/v17.10.265/pxiByp8kv8JHgFVrLEj6Z1JlFc-K.woff2) format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
/* latin */
@font-face {
  font-family: 'Poppins';
  font-style: normal;
  font-weight: 600;
  font-display: optional;
  src: url(/fonts/v17.10.265/pxiByp8kv8JHgFVrLEj6Z1xlFQ.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
/* devanagari */
@font-face {
  font-family: 'Poppins';
  font-style: normal;
  font-weight: 700;
  font-display: optional;
  src: url(/fonts/v17.10.265/pxiByp8kv8JHgFVrLCz7Z11lFc-K.woff2) format('woff2');
  unicode-range: U+0900-097F, U+1CD0-1CF4, U+1CF7-1CF9, U+200C-200D, U+20A8, U+20B9, U+20F0, U+25CC, U+A830-A839, U+A8E0-A8FF, U+11B00-11B0A;
}
/* latin-ext */
@font-face {
  font-family: 'Poppins';
  font-style: normal;
  font-weight: 700;
  font-display: optional;
  src: url(/fonts/v17.10.265/pxiByp8kv8JHgFVrLCz7Z1JlFc-K.woff2) format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
/* latin */
@font-face {
  font-family: 'Poppins';
  font-style: normal;
  font-weight: 700;
  font-display: optional;
  src: url(/fonts/v17.10.265/pxiByp8kv8JHgFVrLCz7Z1xlFQ.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
/* devanagari */
@font-face {
  font-family: 'Poppins';
  font-style: normal;
  font-weight: 800;
  font-display: optional;
  src: url(/fonts/v17.10.265/pxiByp8kv8JHgFVrLDD4Z11lFc-K.woff2) format('woff2');
  unicode-range: U+0900-097F, U+1CD0-1CF4, U+1CF7-1CF9, U+200C-200D, U+20A8, U+20B9, U+20F0, U+25CC, U+A830-A839, U+A8E0-A8FF, U+11B00-11B0A;
}
/* latin-ext */
@font-face {
  font-family: 'Poppins';
  font-style: normal;
  font-weight: 800;
  font-display: optional;
  src: url(/fonts/v17.10.265/pxiByp8kv8JHgFVrLDD4Z1JlFc-K.woff2) format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
/* latin */
@font-face {
  font-family: 'Poppins';
  font-style: normal;
  font-weight: 800;
  font-display: optional;
  src: url(/fonts/v17.10.265/pxiByp8kv8JHgFVrLDD4Z1xlFQ.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

/* Source: /css/reset.css */
/* ==========================================================
   TypingTutor.Online
   reset.css
   Modern CSS Reset
   Version: 1.0
========================================================== */

/* Box Sizing */

*,
*::before,
*::after {
    box-sizing: border-box;
}

/* Remove Default Margin */

* {
    margin: 0;
}

/* Improve Text Rendering */

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

/* Base Body */

body {
    min-height: 100vh;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Images */

img,
picture,
svg,
canvas,
video {
    display: block;
    max-width: 100%;
}

/* Forms */

input,
button,
textarea,
select {
    font: inherit;
    color: inherit;
}

/* Buttons */

button {
    cursor: pointer;
    background: none;
    border: none;
}

/* Links */

a {
    color: inherit;
    text-decoration: none;
}

/* Lists */

ul,
ol {
    list-style: none;
}

/* Tables */

table {
    border-collapse: collapse;
    border-spacing: 0;
}

/* Text Overflow */

p,
h1,
h2,
h3,
h4,
h5,
h6 {
    overflow-wrap: break-word;
}

/* Textarea */

textarea {
    resize: vertical;
}

/* Hidden */

[hidden] {
    display: none !important;
}

/* Disabled */

button:disabled,
input:disabled {
    cursor: not-allowed;
}

/* Focus */

:focus {
    outline: none;
}

:focus-visible {

    outline: 3px solid #2563EB;
    outline-offset: 3px;

}

/* Selection */

::selection {

    background: rgba(37,99,235,.18);

}

/* Scrollbar (Chromium) */

::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {

    background: transparent;

}

::-webkit-scrollbar-thumb {

    background: #CBD5E1;
    border-radius: 999px;

}

::-webkit-scrollbar-thumb:hover {

    background: #94A3B8;

}
/* Source: /css/variables.css */
/* ==========================================================
   TypingTutor.Online
   Theme Variables
   File: css/variables.css
   Version: 4.0
========================================================== */

:root {
    color-scheme: light;

    /* Brand */
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-light: #dbeafe;

    --success: #22c55e;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #06b6d4;

    /* Surfaces */
    --background: #f8fafc;
    --surface: #ffffff;
    --surface-alt: #f1f5f9;
    --surface-soft: #f8fafc;
    --surface-elevated: #ffffff;

    /* Borders and text */
    --border: #cbd5e1;
    --border-soft: #e5eaf1;
    --text: #0f172a;
    --text-light: #475569;
    --text-muted: #94a3b8;

    /* Keyboard */
    --key-bg: #ffffff;
    --key-border: #cbd5e1;
    --key-text: #111827;
    --key-current: #14b8a6;
    --key-next: #8b5cf6;
    --key-pressed: #2563eb;
    --key-correct: #22c55e;
    --key-wrong: #ef4444;
    --key-disabled: #cbd5e1;

    /* Fingers */
    --finger-thumb: #60a5fa;
    --finger-left-index: #4ade80;
    --finger-left-middle: #facc15;
    --finger-left-ring: #fb923c;
    --finger-left-little: #ec4899;
    --finger-right-index: #4ade80;
    --finger-right-middle: #facc15;
    --finger-right-ring: #fb923c;
    --finger-right-little: #ec4899;

    /* Typography */
    --font-heading: "Poppins", sans-serif;
    --font-body: "Inter", sans-serif;
    --font-mono: "JetBrains Mono", monospace;

    --font-xs: .75rem;
    --font-sm: .875rem;
    --font-md: 1rem;
    --font-lg: 1.125rem;
    --font-xl: 1.5rem;
    --font-2xl: 2rem;
    --font-3xl: 3rem;

    --weight-light: 300;
    --weight-normal: 400;
    --weight-medium: 500;
    --weight-semibold: 600;
    --weight-bold: 700;

    /* Spacing */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    --space-10: 40px;
    --space-12: 48px;
    --space-16: 64px;

    /* Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 22px;
    --radius-round: 999px;

    /* Shadows */
    --shadow-xs: 0 1px 2px rgba(15, 23, 42, .05);
    --shadow-sm: 0 2px 6px rgba(15, 23, 42, .08);
    --shadow-md: 0 8px 25px rgba(15, 23, 42, .08);
    --shadow-lg: 0 12px 35px rgba(15, 23, 42, .12);
    --shadow-xl: 0 18px 50px rgba(15, 23, 42, .18);
    --shadow-key: 0 3px 8px rgba(15, 23, 42, .10);
    --shadow-key-pressed: inset 0 3px 8px rgba(15, 23, 42, .22);

    /* Transitions */
    --transition-fast: 120ms;
    --transition-normal: 180ms;
    --transition-medium: 250ms;
    --transition-slow: 400ms;
    --ease: cubic-bezier(.2, .8, .2, 1);

    /* Component sizes */
    --hand-scale: 1;
    --finger-press-distance: 6px;
    --finger-glow-size: 18px;
    --finger-animation-speed: 180ms;
    --key-width: 60px;
    --key-height: 60px;
    --key-gap: 6px;
    --header-height: 72px;
    --lesson-height: 120px;
    --hands-height: 260px;
    --keyboard-height: 320px;
    --footer-height: 60px;

    /* Layers */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-overlay: 300;
    --z-modal: 400;
    --z-toast: 500;

    /* Breakpoints (documentation values) */
    --mobile: 576px;
    --tablet: 768px;
    --laptop: 1024px;
    --desktop: 1280px;
    --wide: 1600px;
}

/* Explicit dark mode */
html[data-theme="dark"] {
    color-scheme: dark;

    --primary: #4f8cff;
    --primary-hover: #75a5ff;
    --primary-light: #172a4d;

    --background: #0b1120;
    --surface: #111827;
    --surface-alt: #182235;
    --surface-soft: #151f31;
    --surface-elevated: #1a2538;

    --border: #334155;
    --border-soft: #263449;

    --text: #f1f5f9;
    --text-light: #cbd5e1;
    --text-muted: #94a3b8;

    --key-bg: #172033;
    --key-border: #3a4960;
    --key-text: #f8fafc;
    --key-disabled: #475569;

    --shadow-xs: 0 1px 2px rgba(0, 0, 0, .18);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, .24);
    --shadow-md: 0 10px 28px rgba(0, 0, 0, .28);
    --shadow-lg: 0 16px 38px rgba(0, 0, 0, .34);
    --shadow-xl: 0 22px 55px rgba(0, 0, 0, .42);
}

/* System mode follows the operating system. */
@media (prefers-color-scheme: dark) {
    html[data-theme="system"] {
        color-scheme: dark;

        --primary: #4f8cff;
        --primary-hover: #75a5ff;
        --primary-light: #172a4d;

        --background: #0b1120;
        --surface: #111827;
        --surface-alt: #182235;
        --surface-soft: #151f31;
        --surface-elevated: #1a2538;

        --border: #334155;
        --border-soft: #263449;

        --text: #f1f5f9;
        --text-light: #cbd5e1;
        --text-muted: #94a3b8;

        --key-bg: #172033;
        --key-border: #3a4960;
        --key-text: #f8fafc;
        --key-disabled: #475569;

        --shadow-xs: 0 1px 2px rgba(0, 0, 0, .18);
        --shadow-sm: 0 2px 8px rgba(0, 0, 0, .24);
        --shadow-md: 0 10px 28px rgba(0, 0, 0, .28);
        --shadow-lg: 0 16px 38px rgba(0, 0, 0, .34);
        --shadow-xl: 0 22px 55px rgba(0, 0, 0, .42);
    }
}

/* Source: /css/typography.css */
/* ==========================================================
   TypingTutor.Online
   typography.css
   Version: 1.0
========================================================== */


/* ==========================================================
   BODY
========================================================== */

body{

    font-family:var(--font-body);

    font-size:var(--font-md);

    font-weight:var(--weight-normal);

    color:var(--text);

    background:var(--background);

    line-height:1.6;

}



/* ==========================================================
   HEADINGS
========================================================== */

h1,h2,h3,h4,h5,h6{

    font-family:var(--font-heading);

    font-weight:var(--weight-bold);

    line-height:1.2;

    color:var(--text);

}

h1{

    font-size:2rem;

}

h2{

    font-size:1.75rem;

}

h3{

    font-size:1.5rem;

}

h4{

    font-size:1.25rem;

}

h5{

    font-size:1.125rem;

}

h6{

    font-size:1rem;

}



/* ==========================================================
   HEADER
========================================================== */

.logo h1{

    font-size:1.8rem;

    letter-spacing:-0.5px;

}

.tagline{

    display:block;

    margin-top:4px;

    color:var(--text-light);

    font-size:.9rem;

}



/* ==========================================================
   LESSON
========================================================== */

#lessonTitle{

    font-size:1.15rem;

    font-weight:600;

    color:var(--primary);

    margin-bottom:10px;

}

#lessonText{

    font-family:var(--font-mono);

    font-size:2.25rem;

    font-weight:600;

    line-height:1.8;

    text-align:center;

    letter-spacing:1px;

}



/* ==========================================================
   STATISTICS
========================================================== */

.stat{

    text-align:center;

}

.stat .label{

    display:block;

    font-size:.85rem;

    text-transform:uppercase;

    letter-spacing:1px;

    color:var(--text-light);

}

.stat span:last-child{

    display:block;

    margin-top:6px;

    font-size:2rem;

    font-weight:700;

}



/* ==========================================================
   BUTTON
========================================================== */

button{

    font-family:var(--font-body);

    font-size:.95rem;

    font-weight:600;

}



/* ==========================================================
   CODE
========================================================== */

code,
pre{

    font-family:var(--font-mono);

}



/* ==========================================================
   LINKS
========================================================== */

a{

    transition:color var(--transition-fast);

}

/* Keep the generic link hover intentionally low-specificity.
   Component links styled as buttons (games, tests, lessons, kids, etc.)
   must retain their own foreground color while hovered. */
:where(a:hover){

    color:var(--primary);

}



/* ==========================================================
   FOOTER
========================================================== */

#footer{

    font-size:.9rem;

    color:var(--text-light);

}



/* ==========================================================
   RESPONSIVE
========================================================== */

@media (max-width:1024px){

    #lessonText{

        font-size:2rem;

    }

}


@media (max-width:768px){

    .logo h1{

        font-size:1.5rem;

    }

    #lessonText{

        font-size:1.6rem;

    }

    .stat span:last-child{

        font-size:1.5rem;

    }

}


@media (max-width:576px){

    #lessonText{

        font-size:1.3rem;

        line-height:1.7;

    }

}
/* Source: /css/app.css */
/* ==========================================================
   TypingTutor.Online
   Responsive Header & Footer v5.5
   File: css/app.css
========================================================== */

body {
    background: var(--background);
    color: var(--text);
    overflow-x: hidden;
}

/* Logo */
.logo {
    display: flex;
    align-items: center;

    color: inherit;
    text-decoration: none;
}

.logo-text {
    display: grid;
    gap: 2px;
    min-width: 0;
}

.logo-text strong {
    overflow: hidden;

    color: var(--text);
    font-family: var(--font-heading);
    font-size: clamp(20px, 1.7vw, 30px);
    font-weight: 800;
    line-height: 1.05;

    white-space: nowrap;
    text-overflow: ellipsis;
}

.logo-text small {
    overflow: hidden;

    color: var(--text-light);
    font-size: clamp(10px, .82vw, 13px);
    line-height: 1.2;

    white-space: nowrap;
    text-overflow: ellipsis;
}

.site-logo-picture {
    display: block;
    min-width: 0;
}

.site-logo-image {
    display: block;

    width: min(280px, 100%);
    height: auto;
    max-height: 58px;

    object-fit: contain;
    object-position: left center;
}

/* Theme button */
#themeButton {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 7px;

    min-width: 108px;
    min-height: 44px;
    padding: 9px 14px;

    color: #ffffff;
    background: var(--primary);
    border-radius: var(--radius-md);

    white-space: nowrap;

    transition:
        background var(--transition-fast),
        transform var(--transition-fast);
}

#themeButton:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
}

#themeButton:active {
    transform: translateY(1px);
}

/* Footer */
.footer-brand {
    color: var(--text-light);
    font-size: 12px;
    font-weight: 600;
}

.footer-links {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    flex-wrap: wrap;
    gap: 6px 16px;
}

.footer-links a {
    color: var(--text-light);
    font-size: 12px;
    font-weight: 600;
    text-decoration: none;

    transition:
        color var(--transition-fast),
        background-color var(--transition-fast);
}

.footer-links a:hover,
.footer-links a:focus-visible {
    color: var(--primary);
    outline: none;
}

/* Theme menu retained */
.theme-button-arrow {
    font-size: 10px;
    opacity: .8;
}

.theme-menu {
    position: fixed;
    z-index: 10050;

    width: 250px;
    padding: 8px;

    background: var(--surface-elevated);
    border: 1px solid var(--border);
    border-radius: 14px;
    box-shadow: var(--shadow-xl);
}

.theme-menu.hidden {
    display: none;
}

.theme-option {
    display: grid;
    grid-template-columns: 36px 1fr 22px;
    gap: 10px;
    align-items: center;

    width: 100%;
    padding: 10px;

    color: var(--text);
    text-align: left;

    background: transparent;
    border: 1px solid transparent;
    border-radius: 10px;

    cursor: pointer;
}

.theme-option:hover,
.theme-option:focus-visible {
    background: var(--surface-alt);
    border-color: var(--border);
    outline: none;
}

.theme-option-icon {
    display: grid;
    place-items: center;

    width: 34px;
    height: 34px;

    background: var(--surface-alt);
    border-radius: 9px;

    font-size: 18px;
}

.theme-option-copy {
    display: grid;
    gap: 2px;
}

.theme-option-copy strong {
    color: var(--text);
    font-size: 13px;
}

.theme-option-copy small {
    color: var(--text-light);
    font-size: 10px;
}

.theme-option-check {
    color: var(--primary);
    font-weight: 900;
    opacity: 0;
}

.theme-option-selected {
    background: var(--primary-light);
    border-color: var(--border);
}

.theme-option-selected .theme-option-check {
    opacity: 1;
}

.hidden {
    display: none !important;
}

@media (max-width: 1180px) {

    .logo-text strong {
        font-size: 22px;
    }

    .logo-text small {
        font-size: 10px;
    }

}

@media (max-width: 900px) {

    .site-logo-image {
        width: min(220px, 100%);
        max-height: 46px;
    }

    .footer-links {
        justify-content: flex-start;
    }

}

@media (max-width: 560px) {

    .logo-text strong {
        font-size: 18px;
    }

    .logo-text small {
        display: none;
    }

    .site-logo-image {
        width: min(170px, 100%);
        max-height: 36px;
    }

    #themeButton {
        min-width: 90px;
        min-height: 40px;
        padding-inline: 11px;
    }

    .footer-links {
        gap: 8px 14px;
    }

}

/* Source: /css/scalable-navigation-v17.4.4.css */
/* ==========================================================
   TypingTutor.Online
   Scalable Site Navigation v17.4.4
========================================================== */

/* ---------- Main tutor header ---------- */
.mode-navigation {
    overflow: visible;
}

.mode-more,
.test-nav-more {
    position: relative;
    flex: 0 0 auto;
}

.mode-more > summary,
.test-nav-more > summary {
    list-style: none;
    cursor: pointer;
    user-select: none;
}

.mode-more > summary::-webkit-details-marker,
.test-nav-more > summary::-webkit-details-marker {
    display: none;
}

.mode-more-chevron {
    margin-left: 1px;
    font-size: .8em;
    transition: transform .18s ease;
}

.mode-more[open] .mode-more-chevron {
    transform: rotate(180deg);
}

.mode-more-menu,
.test-nav-more-menu {
    position: absolute;
    z-index: 1000;
    top: calc(100% + 10px);
    right: 0;
    min-width: 205px;
    padding: 8px;
    border: 1px solid var(--border, #dbe4f0);
    border-radius: 14px;
    background: var(--surface, #ffffff);
    box-shadow: 0 18px 45px rgba(15, 23, 42, .18);
}

.mode-more-menu .mode-button {
    width: 100%;
    justify-content: flex-start;
    min-height: 42px;
    padding: 10px 12px;
    border-radius: 9px;
}

.mode-more-active > .mode-more-button,
.mode-more[open] > .mode-more-button {
    color: var(--primary, #1769ff);
    background: var(--surface-alt, #eef4ff);
}

.mode-more-menu .mode-button-active {
    color: #ffffff;
    background: linear-gradient(135deg, var(--primary), var(--primary-hover));
}

/* ---------- Standalone test headers ---------- */
.test-nav-more > summary {
    min-height: 43px;
    padding: 10px 14px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    border-radius: 11px;
    color: var(--text, #0f172a);
    font-weight: 750;
    white-space: nowrap;
}

.test-nav-more > summary:hover,
.test-nav-more[open] > summary {
    color: #ffffff;
    background: var(--primary, #2563eb);
}

.test-nav-more-menu {
    display: grid;
    gap: 4px;
}

.test-nav-more-menu a {
    width: 100%;
    min-height: 42px;
    padding: 10px 12px;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    border-radius: 9px;
    color: var(--text, #0f172a);
    background: transparent;
    text-decoration: none;
    font-weight: 750;
    white-space: nowrap;
}

.test-nav-more-menu a:hover {
    color: #ffffff;
    background: var(--primary, #2563eb);
}

html[data-theme="dark"] .mode-more-menu,
html[data-theme="dark"] .test-nav-more-menu {
    background: #101b2e;
    border-color: #40516a;
    box-shadow: 0 18px 48px rgba(0, 0, 0, .42);
}

@media (prefers-color-scheme: dark) {
    html[data-theme="system"] .mode-more-menu,
    html[data-theme="system"] .test-nav-more-menu {
        background: #101b2e;
        border-color: #40516a;
        box-shadow: 0 18px 48px rgba(0, 0, 0, .42);
    }
}

/* The menu can open outside the horizontal navigation row on desktop. */
@media (min-width: 901px) {
    #modeSwitcher,
    .mode-switcher-inner,
    .mode-navigation,
    .test-header-inner,
    .test-nav {
        overflow: visible;
    }
}

/* Mobile keeps the compact horizontal row; dropdown opens below More. */
@media (max-width: 900px) {
    .mode-navigation,
    .test-nav {
        overflow-x: auto;
        overflow-y: visible;
        scrollbar-width: none;
    }

    .mode-navigation::-webkit-scrollbar,
    .test-nav::-webkit-scrollbar {
        display: none;
    }

    .mode-more-menu,
    .test-nav-more-menu {
        position: fixed;
        top: auto;
        right: 12px;
        left: 12px;
        margin-top: 8px;
        min-width: 0;
    }
}

@media (max-width: 560px) {
    .mode-more > summary.mode-button {
        min-width: 68px;
        min-height: 42px;
        padding: 7px 8px;
        flex-direction: column;
        gap: 3px;
        font-size: 9px;
    }

    .mode-more-chevron {
        display: none;
    }
}

/* Source: /css/unified-site-header-v17.4.6.css */
/* ==========================================================
   TypingTutor.Online
   Unified Main + Tests Header v17.4.6
========================================================== */

/* Both the tutor and standalone test pages now use the same shell. */
#header,
.test-site-header {
    box-sizing: border-box;
    position: relative;
    z-index: 100;
    width: 100%;
    min-height: 78px;
    padding-top: max(9px, env(safe-area-inset-top));
    padding-bottom: 9px;
    background: var(--surface, #ffffff);
    border-bottom: 1px solid var(--border, #dbe4f0);
    box-shadow: var(--shadow-sm, 0 1px 3px rgba(15, 23, 42, .08));
}

#header .header-inner,
.test-header-inner {
    box-sizing: border-box;
    width: min(1480px, calc(100% - 34px));
    min-height: 58px;
    margin-inline: auto;
    padding: 0;
    display: grid;
    grid-template-columns: minmax(235px, 300px) minmax(0, 1fr) auto;
    gap: clamp(12px, 2vw, 28px);
    align-items: center;
}

/* Identical logo footprint on every page. */
#header .logo,
.test-logo {
    min-width: 0;
    display: flex;
    align-items: center;
    justify-self: start;
    color: inherit;
    text-decoration: none;
}

#header .site-logo-picture,
.test-logo-stack {
    position: relative;
    display: block;
    width: min(280px, 100%);
    min-width: 0;
}

#header .site-logo-image,
.test-logo img {
    display: block;
    width: min(280px, 100%);
    height: auto;
    max-height: 58px;
    object-fit: contain;
    object-position: left center;
}

/* Identical navigation positioning. */
#header .primary-mode-navigation,
.test-nav {
    min-width: 0;
    width: 100%;
    margin: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: clamp(4px, 1.1vw, 18px);
    overflow: visible;
}

#header #modeSwitcher,
#header .mode-switcher-inner,
#header .mode-navigation {
    min-width: 0;
    width: auto;
}

#header .mode-navigation {
    gap: clamp(4px, 1.1vw, 18px);
}

/* Shared button geometry and typography. */
#header .lesson-home-nav-button,
#header .mode-navigation > .mode-button,
#header .mode-more > summary.mode-button,
.test-nav > a,
.test-nav-more > summary {
    box-sizing: border-box;
    min-width: 0;
    min-height: 46px;
    margin: 0;
    padding: 10px clamp(12px, 1.15vw, 17px);
    display: inline-flex;
    flex: 0 0 auto;
    align-items: center;
    justify-content: center;
    gap: 8px;
    color: var(--text, #172235);
    background: transparent;
    border: 1px solid transparent;
    border-radius: 11px;
    font: inherit;
    font-size: clamp(12px, .92vw, 15px);
    font-weight: 750;
    line-height: 1;
    text-decoration: none;
    white-space: nowrap;
    cursor: pointer;
    transition:
        color .16s ease,
        background-color .16s ease,
        border-color .16s ease,
        box-shadow .16s ease,
        transform .16s ease;
}

#header .mode-button-icon,
#header .lesson-home-nav-icon,
.test-nav .mode-button-icon,
.test-nav-more-menu .mode-button-icon {
    display: inline-flex;
    flex: 0 0 20px;
    width: 20px;
    min-width: 20px;
    height: 20px;
    align-items: center;
    justify-content: center;
    font-family: "Apple Color Emoji", "Segoe UI Emoji", "Noto Color Emoji", sans-serif;
    font-size: 18px;
    font-weight: 400;
    line-height: 20px;
    text-align: center;
    transform: translateY(-1px);
}

#header .mode-button-text,
#header .lesson-home-nav-label,
.test-nav .mode-button-text {
    display: inline-flex;
    align-items: center;
    line-height: 1;
}

#header #themeButton > span:first-child,
.test-header-inner > #themeButton > span:first-child {
    display: inline-flex;
    flex: 0 0 20px;
    width: 20px;
    height: 20px;
    align-items: center;
    justify-content: center;
    font-family: "Apple Color Emoji", "Segoe UI Emoji", "Noto Color Emoji", sans-serif;
    font-size: 18px;
    font-weight: 400;
    line-height: 20px;
}

#header .lesson-home-nav-button:hover,
#header .mode-navigation > .mode-button:hover,
#header .mode-more > summary.mode-button:hover,
.test-nav > a:hover,
.test-nav-more > summary:hover,
.test-nav-more[open] > summary {
    color: var(--primary, #1769ff);
    background: var(--surface-alt, #f2f7ff);
    border-color: #dbe8fa;
}

/* Active button has the same appearance regardless of the current page. */
#header .lesson-home-nav-button-active,
#header .mode-navigation > .mode-button-active,
.test-nav > a[aria-current="page"] {
    color: #ffffff !important;
    background: linear-gradient(135deg, #246df0, #285ee5) !important;
    border-color: rgba(31, 92, 222, .55) !important;
    box-shadow: 0 10px 23px rgba(47, 103, 246, .24) !important;
}

#header .lesson-home-nav-button-active:hover,
#header .mode-navigation > .mode-button-active:hover,
.test-nav > a[aria-current="page"]:hover {
    color: #ffffff !important;
    background: linear-gradient(135deg, #2165df, #2457d5) !important;
    border-color: rgba(31, 92, 222, .64) !important;
}

/* Theme control occupies the same final grid column. */
#header .header-tools,
.test-header-inner > #themeButton {
    justify-self: end;
}

#header #themeButton,
.test-header-inner > #themeButton {
    box-sizing: border-box;
    min-width: 108px;
    min-height: 46px;
    margin: 0;
    padding: 10px 14px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    color: #ffffff;
    background: var(--primary, #1769ff);
    border: 0;
    border-radius: 11px;
    font: inherit;
    font-size: clamp(12px, .92vw, 15px);
    font-weight: 750;
    line-height: 1;
    white-space: nowrap;
    cursor: pointer;
}

#header #themeButton:hover,
.test-header-inner > #themeButton:hover {
    color: #ffffff;
    background: var(--primary-hover, #0f5ae0);
}

/* Dropdown alignment is identical in both templates. */
#header .mode-more,
.test-nav-more {
    position: relative;
    flex: 0 0 auto;
}

#header .mode-more-menu,
.test-nav-more-menu {
    top: calc(100% + 10px);
    right: 0;
}

html[data-theme="dark"] #header,
html[data-theme="dark"] .test-site-header {
    background: #101b2e;
    border-color: #40516a;
}

html[data-theme="dark"] #header .lesson-home-nav-button,
html[data-theme="dark"] #header .mode-navigation > .mode-button,
html[data-theme="dark"] #header .mode-more > summary.mode-button,
html[data-theme="dark"] .test-nav > a,
html[data-theme="dark"] .test-nav-more > summary {
    color: #dce7f7;
}

html[data-theme="dark"] #header .lesson-home-nav-button:hover,
html[data-theme="dark"] #header .mode-navigation > .mode-button:hover,
html[data-theme="dark"] #header .mode-more > summary.mode-button:hover,
html[data-theme="dark"] .test-nav > a:hover,
html[data-theme="dark"] .test-nav-more > summary:hover,
html[data-theme="dark"] .test-nav-more[open] > summary {
    color: #ffffff;
    background: #17263c;
    border-color: #304662;
}

@media (prefers-color-scheme: dark) {
    html[data-theme="system"] #header,
    html[data-theme="system"] .test-site-header {
        background: #101b2e;
        border-color: #40516a;
    }

    html[data-theme="system"] #header .lesson-home-nav-button,
    html[data-theme="system"] #header .mode-navigation > .mode-button,
    html[data-theme="system"] #header .mode-more > summary.mode-button,
    html[data-theme="system"] .test-nav > a,
    html[data-theme="system"] .test-nav-more > summary {
        color: #dce7f7;
    }
}

@media (max-width: 1180px) {
    #header .header-inner,
    .test-header-inner {
        grid-template-columns: minmax(190px, 225px) minmax(0, 1fr) auto;
        gap: 10px;
    }

    #header .site-logo-picture,
    #header .site-logo-image,
    .test-logo-stack,
    .test-logo img {
        width: min(225px, 100%);
    }

    #header .primary-mode-navigation,
    #header .mode-navigation,
    .test-nav {
        gap: 3px;
    }

    #header .lesson-home-nav-button,
    #header .mode-navigation > .mode-button,
    #header .mode-more > summary.mode-button,
    .test-nav > a,
    .test-nav-more > summary {
        min-height: 42px;
        padding-inline: 10px;
        font-size: 12px;
    }

    #header #themeButton,
    .test-header-inner > #themeButton {
        min-height: 42px;
        font-size: 12px;
    }
}

@media (max-width: 900px) {
    #header,
    .test-site-header {
        min-height: 0;
        padding-top: max(7px, env(safe-area-inset-top));
        padding-bottom: 7px;
    }

    #header .header-inner,
    .test-header-inner {
        width: min(100% - 22px, 1480px);
        min-height: 0;
        display: grid;
        grid-template-columns: minmax(0, 1fr) auto;
        gap: 8px 12px;
    }

    #header .primary-mode-navigation,
    .test-nav {
        grid-column: 1 / -1;
        grid-row: 2;
        width: 100%;
        justify-content: flex-start;
        overflow-x: auto;
        overflow-y: visible;
        padding: 2px 0 3px;
        scrollbar-width: none;
        -webkit-overflow-scrolling: touch;
    }

    #header .primary-mode-navigation::-webkit-scrollbar,
    .test-nav::-webkit-scrollbar {
        display: none;
    }

    #header .header-tools,
    .test-header-inner > #themeButton {
        grid-column: 2;
        grid-row: 1;
    }

    .test-logo {
        grid-column: 1;
        grid-row: 1;
    }
}

@media (max-width: 560px) {
    #header .header-inner,
    .test-header-inner {
        width: min(100% - 14px, 1480px);
    }

    #header .site-logo-picture,
    #header .site-logo-image,
    .test-logo-stack,
    .test-logo img {
        width: min(190px, 100%);
    }

    #header .lesson-home-nav-button,
    #header .mode-navigation > .mode-button,
    #header .mode-more > summary.mode-button,
    .test-nav > a,
    .test-nav-more > summary {
        min-width: 68px;
        min-height: 42px;
        padding: 7px 8px;
        flex-direction: column;
        gap: 3px;
        font-size: 9px;
    }

    #header .mode-more-chevron,
    .test-nav-more > summary .mode-more-chevron {
        display: none;
    }

    #header #themeButton,
    .test-header-inner > #themeButton {
        min-width: 88px;
        min-height: 42px;
        padding-inline: 10px;
        font-size: 11px;
    }

    #header .mode-button-icon,
    #header .lesson-home-nav-icon,
    .test-nav .mode-button-icon,
    .test-nav-more-menu .mode-button-icon {
        flex-basis: 19px;
        width: 19px;
        min-width: 19px;
        height: 19px;
        font-size: 17px;
        line-height: 19px;
    }
}

@media (prefers-reduced-motion: reduce) {
    #header .lesson-home-nav-button,
    #header .mode-navigation > .mode-button,
    #header .mode-more > summary.mode-button,
    .test-nav > a,
    .test-nav-more > summary {
        transition: none;
    }
}


/* ==========================================================
   SHARED SECTION FOOTER v17.5.2
========================================================== */
.test-footer,
.certificate-footer,
.blog-footer {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 12px 24px;
    width: min(1480px, calc(100% - 32px));
    margin: 28px auto 0;
    padding: 24px 0 30px;
    color: var(--muted, #64748b);
    font-size: 13px;
}

.shared-footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 9px 17px;
}

.shared-footer-links a {
    color: inherit;
    text-decoration: none;
}

.shared-footer-links a:hover,
.shared-footer-links a:focus-visible {
    color: var(--primary, #1769ff);
}

@media (max-width: 760px) {
    .test-footer,
    .certificate-footer,
    .blog-footer {
        align-items: flex-start;
        flex-direction: column;
    }
}

/* Source: /css/site-section-header-v17.5.3.css */
/* ==========================================================
   TypingTutor.Online
   Shared Section Header Polish v17.5.3
========================================================== */

.test-logo-stack {
    position: relative;
    display: block;
    width: min(280px, 100%);
    min-width: 0;
    aspect-ratio: 280 / 58;
}

.test-logo-stack .test-logo-light,
.test-logo-stack .test-logo-dark {
    display: block;
    width: 100%;
    height: 100%;
    max-height: 58px;
    object-fit: contain;
    object-position: left center;
    transition: opacity .16s ease;
}

.test-logo-stack .test-logo-dark {
    position: absolute;
    inset: 0;
    opacity: 0;
    pointer-events: none;
}

html[data-theme="light"] .test-logo-light,
html[data-theme="system"] .test-logo-light {
    opacity: 1;
}

html[data-theme="light"] .test-logo-dark {
    opacity: 0;
}

html[data-theme="dark"] .test-logo-light {
    opacity: 0;
}

html[data-theme="dark"] .test-logo-dark {
    opacity: 1;
}

@media (prefers-color-scheme: dark) {
    html[data-theme="system"] .test-logo-light {
        opacity: 0;
    }

    html[data-theme="system"] .test-logo-dark {
        opacity: 1;
    }
}

@media (prefers-color-scheme: light) {
    html[data-theme="system"] .test-logo-light {
        opacity: 1;
    }

    html[data-theme="system"] .test-logo-dark {
        opacity: 0;
    }
}

/* The homepage Theme manager creates this exact three-part button. */
.test-header-inner > #themeButton .theme-button-arrow {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-left: 1px;
    font-size: .75em;
    line-height: 1;
}

@media (max-width: 560px) {
    .test-logo-stack {
        width: min(190px, 100%);
    }
}

@media (prefers-reduced-motion: reduce) {
    .test-logo-stack .test-logo-light,
    .test-logo-stack .test-logo-dark {
        transition: none;
    }
}

/* Source: /blogs/blogs.css */

:root {
    --blog-primary: #1769ff;
    --blog-primary-dark: #0d4fd7;
    --blog-text: #122039;
    --blog-muted: #5d6f89;
    --blog-surface: #ffffff;
    --blog-soft: #f2f6fc;
    --blog-border: #dce5f1;
    --blog-shadow: 0 16px 42px rgba(20, 42, 76, .08);
}

html[data-theme="dark"] {
    --blog-text: #f2f6ff;
    --blog-muted: #a9b7ca;
    --blog-surface: #111c2e;
    --blog-soft: #17243a;
    --blog-border: #2b3b53;
    --blog-shadow: 0 18px 50px rgba(0, 0, 0, .27);
}

@media (prefers-color-scheme: dark) {
    html[data-theme="system"] {
        --blog-text: #f2f6ff;
        --blog-muted: #a9b7ca;
        --blog-surface: #111c2e;
        --blog-soft: #17243a;
        --blog-border: #2b3b53;
        --blog-shadow: 0 18px 50px rgba(0, 0, 0, .27);
    }
}

body {
    color: var(--blog-text);
    background: var(--background, #f5f7fb);
}

.blog-shell {
    width: min(1240px, calc(100% - 32px));
    margin: 0 auto;
    padding: 26px 0 54px;
}

.blog-breadcrumbs {
    margin: 0 0 16px;
    color: var(--blog-muted);
    font-size: 13px;
}

.blog-breadcrumbs a { color: var(--blog-primary); text-decoration: none; }

.blog-hero,
.blog-card,
.blog-article,
.blog-directory,
.blog-newsletter {
    background: var(--blog-surface);
    border: 1px solid var(--blog-border);
    border-radius: 22px;
    box-shadow: var(--blog-shadow);
}

.blog-hero {
    display: grid;
    grid-template-columns: minmax(0, 1.5fr) minmax(280px, .7fr);
    gap: 30px;
    align-items: center;
    padding: clamp(30px, 5vw, 62px);
}

.blog-eyebrow {
    display: inline-block;
    margin-bottom: 10px;
    color: var(--blog-primary);
    font-size: 12px;
    font-weight: 800;
    letter-spacing: .1em;
    text-transform: uppercase;
}

.blog-hero h1,
.blog-article h1 {
    margin: 0 0 14px;
    font-family: Poppins, Inter, sans-serif;
    font-size: clamp(34px, 5vw, 58px);
    line-height: 1.08;
}

.blog-hero p,
.blog-lead {
    margin: 0;
    color: var(--blog-muted);
    font-size: 18px;
    line-height: 1.75;
}

.blog-hero-actions,
.blog-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 24px;
}

.blog-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 10px 17px;
    color: #fff;
    background: var(--blog-primary);
    border-radius: 11px;
    font-weight: 800;
    text-decoration: none;
}

.blog-button.secondary {
    color: var(--blog-text);
    background: var(--blog-soft);
    border: 1px solid var(--blog-border);
}

.blog-hero-panel {
    display: grid;
    gap: 12px;
}

.blog-hero-panel div {
    padding: 18px;
    background: var(--blog-soft);
    border: 1px solid var(--blog-border);
    border-radius: 14px;
}

.blog-hero-panel span { display: block; color: var(--blog-muted); font-size: 12px; font-weight: 700; text-transform: uppercase; }
.blog-hero-panel strong { display: block; margin-top: 3px; font-size: 21px; }

.blog-section-heading {
    margin: 38px 0 16px;
}

.blog-section-heading h2 {
    margin: 0 0 5px;
    font-size: clamp(27px, 3.5vw, 38px);
}

.blog-section-heading p { margin: 0; color: var(--blog-muted); }

.blog-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
}

.blog-card {
    position: relative;
    display: flex;
    flex-direction: column;
    padding: 24px;
    cursor: pointer;
    transition: transform .18s ease, border-color .18s ease, box-shadow .18s ease;
}

.blog-card-icon {
    display: grid;
    place-items: center;
    width: 48px;
    height: 48px;
    margin-bottom: 16px;
    background: var(--blog-soft);
    border: 1px solid var(--blog-border);
    border-radius: 13px;
    font-size: 24px;
}

.blog-card h2,
.blog-card h3 { margin: 0 0 9px; font-size: 21px; line-height: 1.3; }
.blog-card p { flex: 1; margin: 0 0 18px; color: var(--blog-muted); }
.blog-card a { color: var(--blog-primary); font-weight: 800; text-decoration: none; }

/* v17.10.99 — make the complete blog card use its existing article link. */
.blog-card > a::after {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 1;
    border-radius: inherit;
}

.blog-card:hover {
    border-color: var(--blog-primary);
    box-shadow: 0 20px 48px rgba(20, 42, 76, .14);
    transform: translateY(-3px);
}

.blog-card:hover > a { text-decoration: underline; }

.blog-card:focus-within {
    border-color: var(--blog-primary);
    outline: 3px solid rgba(23, 105, 255, .28);
    outline-offset: 3px;
}

.blog-card > a:focus-visible { outline: none; }
.blog-card:active { transform: translateY(-1px); }

@media (prefers-reduced-motion: reduce) {
    .blog-card { transition: none; }
    .blog-card:hover,
    .blog-card:active { transform: none; }
}

.blog-article {
    max-width: 980px;
    margin: 0 auto;
    padding: clamp(26px, 5vw, 58px);
}

.blog-article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 18px;
    margin: 0 0 22px;
    color: var(--blog-muted);
    font-size: 13px;
}

.blog-article h2 { margin: 38px 0 10px; font-size: 29px; line-height: 1.25; }
.blog-article h3 { margin: 27px 0 8px; font-size: 21px; }
.blog-article p,
.blog-article li { color: var(--blog-muted); font-size: 16px; line-height: 1.82; }
.blog-article ul,
.blog-article ol { padding-left: 23px; }
.blog-article a { color: var(--blog-primary); }

.blog-callout {
    margin: 26px 0;
    padding: 20px 22px;
    background: var(--blog-soft);
    border: 1px solid var(--blog-border);
    border-left: 5px solid var(--blog-primary);
    border-radius: 14px;
}

.blog-callout strong { display: block; margin-bottom: 5px; }
.blog-callout p { margin: 0; }

.blog-faq { margin-top: 34px; }
.blog-faq details { padding: 16px 0; border-top: 1px solid var(--blog-border); }
.blog-faq summary { cursor: pointer; font-weight: 800; }

.blog-directory {
    max-width: 980px;
    margin: 20px auto 0;
    padding: 24px;
}

.blog-directory h2 { margin: 0 0 14px; }
.blog-directory-links { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 10px; }
.blog-directory-links a { padding: 13px 15px; color: var(--blog-text); background: var(--blog-soft); border: 1px solid var(--blog-border); border-radius: 11px; font-weight: 700; text-decoration: none; }
.blog-directory-links a:hover { color: var(--blog-primary); }

@media (max-width: 980px) {
    .blog-hero { grid-template-columns: 1fr; }
    .blog-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 680px) {
    .blog-shell { width: min(100% - 20px, 1240px); padding-top: 18px; }
    .blog-grid,
    .blog-directory-links { grid-template-columns: 1fr; }
    .blog-hero,
    .blog-article { border-radius: 17px; }
    .blog-article h1 { font-size: 34px; }
}

/* v17.8.51: source references for ergonomics / hand-comfort guides */
.blog-sources {
    margin-top: 34px;
    padding: 20px 22px;
    background: var(--blog-soft);
    border: 1px solid var(--blog-border);
    border-radius: 14px;
}
.blog-sources h2 { margin-top: 0; font-size: 23px; }
.blog-sources p { margin: 0 0 10px; }
.blog-sources ul { margin: 0; padding-left: 20px; }
.blog-sources li { margin: 4px 0; }

/* ==========================================================
   v17.8.53 — Blog CTA button contrast / theme fix
   The general .blog-article a rule is more specific than .blog-button,
   so primary CTA text could inherit the blue link color on a blue button.
   Keep CTA labels explicit in every interaction and theme state.
   ========================================================== */
.blog-button:link,
.blog-button:visited,
.blog-article a.blog-button,
.blog-hero a.blog-button {
    color: #ffffff !important;
    -webkit-text-fill-color: #ffffff !important;
    opacity: 1;
}

.blog-button:hover,
.blog-button:focus-visible,
.blog-button:active,
.blog-article a.blog-button:hover,
.blog-article a.blog-button:focus-visible,
.blog-article a.blog-button:active {
    color: #ffffff !important;
    -webkit-text-fill-color: #ffffff !important;
    background: var(--blog-primary-dark);
}

.blog-button:focus-visible {
    outline: 3px solid rgba(23, 105, 255, .28);
    outline-offset: 3px;
}

.blog-button.secondary:link,
.blog-button.secondary:visited,
.blog-article a.blog-button.secondary,
.blog-hero a.blog-button.secondary {
    color: var(--blog-text) !important;
    -webkit-text-fill-color: var(--blog-text) !important;
    background: var(--blog-soft);
    border: 1px solid var(--blog-border);
}

.blog-button.secondary:hover,
.blog-button.secondary:focus-visible,
.blog-button.secondary:active,
.blog-article a.blog-button.secondary:hover,
.blog-article a.blog-button.secondary:focus-visible,
.blog-article a.blog-button.secondary:active {
    color: var(--blog-primary) !important;
    -webkit-text-fill-color: var(--blog-primary) !important;
    background: var(--blog-soft);
}



/* v17.10.22 — research tables and compact benchmark cards */
.blog-data-table-wrap{overflow-x:auto;margin:22px 0 28px;border:1px solid var(--blog-border);border-radius:16px;background:var(--blog-card)}
.blog-data-table{width:100%;border-collapse:collapse;min-width:720px}
.blog-data-table th,.blog-data-table td{padding:14px 16px;text-align:left;vertical-align:top;border-bottom:1px solid var(--blog-border);font-size:15px;line-height:1.55}
.blog-data-table th{background:var(--blog-soft);color:var(--blog-text);font-weight:800}
.blog-data-table td{color:var(--blog-muted)}
.blog-data-table tr:last-child td{border-bottom:0}
.blog-data-table strong{color:var(--blog-text)}
.blog-source-list{margin:16px 0 0;padding-left:22px}
.blog-source-list li{margin:8px 0}
.blog-source-note{margin:26px 0;padding:18px 20px;border:1px solid var(--blog-border);border-radius:14px;background:var(--blog-soft)}
.blog-source-note p{margin:0}

/* Source: /css/universal-footer-v17.10.21.css */
/* TypingTutor.Online global footer v17.10.21 */
.universal-site-footer{display:block;box-sizing:border-box;width:100%;margin-top:48px;padding:36px clamp(18px,4vw,56px) 24px;color:var(--text-light,#64748b);background:linear-gradient(180deg,#fbfdff 0%,#f6f9fd 100%);border-top:1px solid var(--border,#d9e2ef);font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
.universal-footer-inner{box-sizing:border-box;width:min(1500px,100%);margin:0 auto}
.universal-footer-main{display:grid;grid-template-columns:minmax(240px,.85fr) minmax(0,2.15fr);gap:clamp(32px,5vw,72px);align-items:start}
.universal-footer-brand{display:grid;gap:9px;max-width:340px;text-align:left}
.universal-footer-home{width:max-content;color:var(--text,#0f172a)!important;font-size:18px;font-weight:850;line-height:1.25;text-decoration:none;letter-spacing:-.01em}
.universal-footer-home:hover,.universal-footer-home:focus-visible{color:var(--primary,#1769ff)!important}
.universal-footer-brand span{color:var(--text-light,#64748b);font-size:13px;font-weight:550;line-height:1.6}
.universal-footer-nav{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:26px clamp(22px,4vw,54px)}
.universal-footer-group{min-width:0}
.universal-footer-group>strong{display:block;margin:0 0 10px;color:var(--text,#0f172a);font-size:11px;font-weight:850;letter-spacing:.08em;text-transform:uppercase}
.universal-footer-group-links{display:grid;gap:8px}
.universal-footer-group-links a{width:max-content;max-width:100%;color:var(--text-light,#64748b);font-size:13px;font-weight:700;line-height:1.45;text-decoration:none;transition:color .16s ease,transform .16s ease}
.universal-footer-group-links a:hover,.universal-footer-group-links a:focus-visible{color:var(--primary,#1769ff);text-decoration:underline;text-underline-offset:3px}
.universal-footer-bottom{display:flex;align-items:center;justify-content:space-between;gap:18px;margin-top:28px;padding-top:18px;border-top:1px solid color-mix(in srgb,var(--border,#d9e2ef) 82%,transparent);color:var(--text-light,#64748b);font-size:11px;font-weight:600;line-height:1.5}
html[data-theme="dark"] .universal-site-footer{color:#94a3b8;background:#0f172a;border-top-color:#334155}
html[data-theme="dark"] .universal-footer-home,html[data-theme="dark"] .universal-footer-group>strong{color:#f8fafc!important}
html[data-theme="dark"] .universal-footer-brand span,html[data-theme="dark"] .universal-footer-group-links a,html[data-theme="dark"] .universal-footer-bottom{color:#a8b5c7}
html[data-theme="dark"] .universal-footer-bottom{border-top-color:#334155}
html[data-theme="dark"] .universal-footer-home:hover,html[data-theme="dark"] .universal-footer-home:focus-visible,html[data-theme="dark"] .universal-footer-group-links a:hover,html[data-theme="dark"] .universal-footer-group-links a:focus-visible{color:#60a5fa!important}
@media(prefers-color-scheme:dark){html[data-theme="system"] .universal-site-footer{color:#94a3b8;background:#0f172a;border-top-color:#334155}html[data-theme="system"] .universal-footer-home,html[data-theme="system"] .universal-footer-group>strong{color:#f8fafc!important}html[data-theme="system"] .universal-footer-brand span,html[data-theme="system"] .universal-footer-group-links a,html[data-theme="system"] .universal-footer-bottom{color:#a8b5c7}html[data-theme="system"] .universal-footer-bottom{border-top-color:#334155}html[data-theme="system"] .universal-footer-home:hover,html[data-theme="system"] .universal-footer-home:focus-visible,html[data-theme="system"] .universal-footer-group-links a:hover,html[data-theme="system"] .universal-footer-group-links a:focus-visible{color:#60a5fa!important}}
@media(max-width:900px){.universal-site-footer{padding-top:30px}.universal-footer-main{grid-template-columns:1fr;gap:26px}.universal-footer-brand{max-width:620px}.universal-footer-nav{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(max-width:620px){.universal-site-footer{margin-top:32px;padding:28px 18px 20px}.universal-footer-nav{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px 18px}.universal-footer-group:last-child{grid-column:1/-1}.universal-footer-group:last-child .universal-footer-group-links{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px 14px}.universal-footer-group-links a{width:auto;padding:2px 0}.universal-footer-bottom{align-items:flex-start;flex-direction:column;gap:5px;margin-top:24px}}
@media(max-width:390px){.universal-footer-nav{grid-template-columns:1fr}.universal-footer-group:last-child{grid-column:auto}.universal-footer-group:last-child .universal-footer-group-links{grid-template-columns:1fr}}
@media print{.universal-site-footer{display:none!important}}

/* Source: /css/universal-site-header-v17.7.2.css */
/* ==========================================================
   TypingTutor.Online — Universal Site Header v17.7.2
   One complete header for tutor, tests, games, kids, blog,
   certificates, information pages, sitemap, and 404.
========================================================== */

#header,
.test-site-header {
    box-sizing: border-box !important;
    position: relative;
    z-index: 1000;
    width: 100%;
    min-height: 80px;
    padding: max(9px, env(safe-area-inset-top)) 0 9px;
    background: var(--surface, #ffffff);
    border-bottom: 1px solid var(--border, #dbe4f0);
    box-shadow: 0 2px 10px rgba(15, 23, 42, .06);
}

#header .header-inner,
.test-header-inner {
    box-sizing: border-box;
    width: min(1660px, calc(100% - 34px));
    min-height: 60px;
    margin-inline: auto;
    padding: 0;
    display: grid;
    grid-template-columns: minmax(235px, 300px) minmax(0, 1fr) auto;
    gap: clamp(10px, 1.4vw, 24px);
    align-items: center;
}

#header .logo,
.test-logo {
    min-width: 0;
    display: flex;
    align-items: center;
    justify-self: start;
    color: inherit;
    text-decoration: none;
}

#header .site-logo-picture,
.test-logo-stack {
    position: relative;
    display: grid;
    width: min(280px, 100%);
    min-width: 0;
}

#header .site-logo-picture,
#header .site-logo-picture-light,
#header .site-logo-picture-dark,
.test-logo-stack > img {
    grid-area: 1 / 1;
}

#header .site-logo-image,
.test-logo img {
    display: block;
    width: min(280px, 100%);
    height: auto;
    max-height: 60px;
    object-fit: contain;
    object-position: left center;
}

#header .site-logo-picture-dark,
.test-logo-dark {
    display: none !important;
}

html[data-theme="dark"] #header .site-logo-picture-light,
html[data-theme="dark"] .test-logo-light {
    display: none !important;
}

html[data-theme="dark"] #header .site-logo-picture-dark,
html[data-theme="dark"] .test-logo-dark {
    display: block !important;
}

#header .primary-mode-navigation,
.test-nav {
    min-width: 0;
    width: 100%;
    margin: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: clamp(2px, .72vw, 12px);
    overflow: visible;
}

#header #modeSwitcher,
#header .mode-switcher-inner,
#header .mode-navigation {
    min-width: 0;
    width: auto;
}

#header .mode-navigation {
    display: flex;
    align-items: center;
    gap: clamp(2px, .72vw, 12px);
}

#header .mode-switcher-heading {
    display: none !important;
}

#header .lesson-home-nav-button,
#header .mode-navigation > .mode-button,
#header .mode-more > summary.mode-button,
.test-nav > a,
.test-nav-more > summary {
    box-sizing: border-box;
    min-width: 0;
    min-height: 48px;
    margin: 0;
    padding: 10px clamp(9px, .78vw, 15px);
    display: inline-flex;
    flex: 0 0 auto;
    align-items: center;
    justify-content: center;
    gap: 8px;
    color: var(--text, #172235);
    background: transparent;
    border: 1px solid transparent;
    border-radius: 12px;
    font: inherit;
    font-size: clamp(12px, .84vw, 15px);
    font-weight: 750;
    line-height: 1;
    text-decoration: none;
    white-space: nowrap;
    cursor: pointer;
    transition: color .16s ease, background-color .16s ease,
        border-color .16s ease, box-shadow .16s ease, transform .16s ease;
}

#header .mode-button-icon,
#header .lesson-home-nav-icon,
.test-nav .mode-button-icon,
.test-nav-more-menu .mode-button-icon {
    display: inline-flex;
    flex: 0 0 22px;
    width: 22px;
    min-width: 22px;
    height: 22px;
    align-items: center;
    justify-content: center;
    font-family: "Apple Color Emoji", "Segoe UI Emoji", "Noto Color Emoji", sans-serif;
    font-size: 19px;
    font-weight: 400;
    line-height: 22px;
    text-align: center;
}

#header .mode-button-text,
#header .lesson-home-nav-label,
.test-nav .mode-button-text {
    display: inline-flex;
    align-items: center;
    line-height: 1;
}

#header .lesson-home-nav-button:hover,
#header .mode-navigation > .mode-button:hover,
#header .mode-more > summary.mode-button:hover,
.test-nav > a:hover,
.test-nav-more > summary:hover,
.test-nav-more[open] > summary {
    color: var(--primary, #1769ff);
    background: var(--surface-alt, #f2f7ff);
    border-color: #dbe8fa;
}

#header .lesson-home-nav-button-active,
#header .mode-navigation > .mode-button-active,
#header .mode-more.mode-more-active > summary,
.test-nav > a[aria-current="page"],
.test-nav > a.mode-button-active,
.test-nav-more.mode-more-active > summary {
    color: #ffffff !important;
    background: linear-gradient(135deg, #246df0, #285ee5) !important;
    border-color: rgba(31, 92, 222, .58) !important;
    box-shadow: 0 10px 24px rgba(47, 103, 246, .24) !important;
}

#header .header-tools,
.test-header-inner > #themeButton {
    justify-self: end;
}

#header #themeButton,
.test-header-inner > #themeButton {
    box-sizing: border-box;
    min-width: 116px;
    min-height: 48px;
    margin: 0;
    padding: 10px 15px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    color: #ffffff;
    background: linear-gradient(135deg, #246df0, #285ee5);
    border: 0;
    border-radius: 12px;
    font: inherit;
    font-size: clamp(12px, .84vw, 15px);
    font-weight: 750;
    line-height: 1;
    white-space: nowrap;
    cursor: pointer;
    box-shadow: 0 8px 20px rgba(47, 103, 246, .20);
}

#header #themeButton > span:first-child,
.test-header-inner > #themeButton > span:first-child {
    display: inline-flex;
    flex: 0 0 22px;
    width: 22px;
    height: 22px;
    align-items: center;
    justify-content: center;
    font-family: "Apple Color Emoji", "Segoe UI Emoji", "Noto Color Emoji", sans-serif;
    font-size: 19px;
    line-height: 22px;
}

.theme-button-arrow,
.mode-more-chevron {
    font-size: 10px;
    opacity: .8;
}

#header .mode-more,
.test-nav-more {
    position: relative;
    flex: 0 0 auto;
}

#header .mode-more > summary,
.test-nav-more > summary {
    list-style: none;
}

#header .mode-more > summary::-webkit-details-marker,
.test-nav-more > summary::-webkit-details-marker {
    display: none;
}

#header .mode-more-menu,
.test-nav-more-menu {
    box-sizing: border-box;
    position: absolute;
    z-index: 1200;
    top: calc(100% + 10px);
    right: 0;
    width: 244px;
    padding: 8px;
    display: none;
    gap: 4px;
    background: var(--surface-elevated, #ffffff);
    border: 1px solid var(--border, #dbe4f0);
    border-radius: 14px;
    box-shadow: 0 18px 42px rgba(15, 23, 42, .18);
}

#header .mode-more[open] .mode-more-menu,
.test-nav-more[open] .test-nav-more-menu {
    display: grid;
}

#header .mode-more-menu .mode-button,
.test-nav-more-menu a,
.test-nav-more-menu button {
    box-sizing: border-box;
    width: 100%;
    min-height: 44px;
    padding: 10px 12px;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 10px;
    color: var(--text, #172235);
    background: transparent;
    border: 1px solid transparent;
    border-radius: 10px;
    font: inherit;
    font-size: 13px;
    font-weight: 700;
    text-decoration: none;
    cursor: pointer;
}

#header .mode-more-menu .mode-button:hover,
.test-nav-more-menu a:hover,
.test-nav-more-menu button:hover,
.test-nav-more-menu a[aria-current="page"] {
    color: var(--primary, #1769ff);
    background: var(--surface-alt, #f2f7ff);
    border-color: var(--border, #dbe4f0);
}

/* Theme chooser: included here so simple information pages match the app. */
.theme-menu {
    position: fixed;
    z-index: 10050;
    width: 250px;
    padding: 8px;
    background: var(--surface-elevated, #ffffff);
    border: 1px solid var(--border, #dbe4f0);
    border-radius: 14px;
    box-shadow: 0 18px 45px rgba(15, 23, 42, .22);
}
.theme-menu.hidden { display: none !important; }
.theme-option {
    display: grid;
    grid-template-columns: 36px 1fr 22px;
    gap: 10px;
    align-items: center;
    width: 100%;
    padding: 10px;
    color: var(--text, #172235);
    text-align: left;
    background: transparent;
    border: 1px solid transparent;
    border-radius: 10px;
    cursor: pointer;
}
.theme-option:hover,
.theme-option:focus-visible {
    background: var(--surface-alt, #f2f7ff);
    border-color: var(--border, #dbe4f0);
    outline: none;
}
.theme-option-icon {
    display: grid;
    place-items: center;
    width: 34px;
    height: 34px;
    background: var(--surface-alt, #f2f7ff);
    border-radius: 9px;
    font-size: 18px;
}
.theme-option-copy { display: grid; gap: 2px; }
.theme-option-copy strong { color: var(--text, #172235); font-size: 13px; }
.theme-option-copy small { color: var(--text-light, #718096); font-size: 10px; }
.theme-option-check { color: var(--primary, #1769ff); font-weight: 900; opacity: 0; }
.theme-option-selected { background: var(--primary-light, #edf4ff); border-color: var(--border, #dbe4f0); }
.theme-option-selected .theme-option-check { opacity: 1; }

html[data-theme="dark"] #header,
html[data-theme="dark"] .test-site-header {
    background: #101b2e;
    border-color: #40516a;
}
html[data-theme="dark"] #header .lesson-home-nav-button,
html[data-theme="dark"] #header .mode-navigation > .mode-button,
html[data-theme="dark"] #header .mode-more > summary.mode-button,
html[data-theme="dark"] .test-nav > a,
html[data-theme="dark"] .test-nav-more > summary,
html[data-theme="dark"] #header .mode-more-menu .mode-button,
html[data-theme="dark"] .test-nav-more-menu a,
html[data-theme="dark"] .test-nav-more-menu button {
    color: #dce7f7;
}
html[data-theme="dark"] #header .mode-more-menu,
html[data-theme="dark"] .test-nav-more-menu,
html[data-theme="dark"] .theme-menu {
    background: #101b2e;
    border-color: #40516a;
}
html[data-theme="dark"] .theme-option,
html[data-theme="dark"] .theme-option-copy strong { color: #e7eef9; }
html[data-theme="dark"] .theme-option-copy small { color: #9aabc2; }
html[data-theme="dark"] .theme-option-icon,
html[data-theme="dark"] .theme-option:hover,
html[data-theme="dark"] .theme-option:focus-visible,
html[data-theme="dark"] #header .mode-more-menu .mode-button:hover,
html[data-theme="dark"] .test-nav-more-menu a:hover,
html[data-theme="dark"] .test-nav-more-menu button:hover {
    background: #17263c;
    border-color: #304662;
}

@media (prefers-color-scheme: dark) {
    html[data-theme="system"] #header,
    html[data-theme="system"] .test-site-header {
        background: #101b2e;
        border-color: #40516a;
    }
    html[data-theme="system"] #header .site-logo-picture-light,
    html[data-theme="system"] .test-logo-light { display: none !important; }
    html[data-theme="system"] #header .site-logo-picture-dark,
    html[data-theme="system"] .test-logo-dark { display: block !important; }
    html[data-theme="system"] #header .lesson-home-nav-button,
    html[data-theme="system"] #header .mode-navigation > .mode-button,
    html[data-theme="system"] #header .mode-more > summary.mode-button,
    html[data-theme="system"] .test-nav > a,
    html[data-theme="system"] .test-nav-more > summary,
    html[data-theme="system"] #header .mode-more-menu .mode-button,
    html[data-theme="system"] .test-nav-more-menu a,
    html[data-theme="system"] .test-nav-more-menu button { color: #dce7f7; }
    html[data-theme="system"] #header .mode-more-menu,
    html[data-theme="system"] .test-nav-more-menu,
    html[data-theme="system"] .theme-menu {
        background: #101b2e;
        border-color: #40516a;
    }
}

@media (max-width: 1360px) {
    #header .header-inner,
    .test-header-inner {
        grid-template-columns: minmax(205px, 235px) minmax(0, 1fr) auto;
        gap: 8px;
    }
    #header .site-logo-picture,
    #header .site-logo-image,
    .test-logo-stack,
    .test-logo img { width: min(235px, 100%); }
    #header .lesson-home-nav-button,
    #header .mode-navigation > .mode-button,
    #header .mode-more > summary.mode-button,
    .test-nav > a,
    .test-nav-more > summary {
        min-height: 44px;
        padding-inline: 8px;
        gap: 6px;
        font-size: 12px;
    }
    #header #themeButton,
    .test-header-inner > #themeButton {
        min-width: 104px;
        min-height: 44px;
        padding-inline: 11px;
        font-size: 12px;
    }
}

@media (max-width: 1040px) {
    #header,
    .test-site-header {
        min-height: 0;
        padding-top: max(7px, env(safe-area-inset-top));
        padding-bottom: 7px;
    }
    #header .header-inner,
    .test-header-inner {
        width: min(100% - 22px, 1660px);
        min-height: 0;
        grid-template-columns: minmax(0, 1fr) auto;
        gap: 8px 12px;
    }
    #header .primary-mode-navigation,
    .test-nav {
        grid-column: 1 / -1;
        grid-row: 2;
        width: 100%;
        justify-content: flex-start;
        overflow-x: auto;
        overflow-y: visible;
        padding: 2px 0 3px;
        scrollbar-width: none;
        -webkit-overflow-scrolling: touch;
    }
    #header .primary-mode-navigation::-webkit-scrollbar,
    .test-nav::-webkit-scrollbar { display: none; }
    #header .header-tools,
    .test-header-inner > #themeButton { grid-column: 2; grid-row: 1; }
    .test-logo { grid-column: 1; grid-row: 1; }
}

@media (max-width: 590px) {
    #header .header-inner,
    .test-header-inner { width: min(100% - 14px, 1660px); }
    #header .site-logo-picture,
    #header .site-logo-image,
    .test-logo-stack,
    .test-logo img { width: min(190px, 100%); }
    #header .lesson-home-nav-button,
    #header .mode-navigation > .mode-button,
    #header .mode-more > summary.mode-button,
    .test-nav > a,
    .test-nav-more > summary {
        min-width: 68px;
        min-height: 44px;
        padding: 7px 8px;
        flex-direction: column;
        gap: 3px;
        font-size: 9px;
    }
    #header .mode-more-chevron,
    .test-nav-more .mode-more-chevron { display: none; }
    #header #themeButton,
    .test-header-inner > #themeButton {
        min-width: 48px;
        min-height: 42px;
        padding: 8px 10px;
    }
    #header #themeButton > span:nth-child(2),
    #header #themeButton > span:last-child,
    .test-header-inner > #themeButton > span:nth-child(2),
    .test-header-inner > #themeButton > span:last-child { display: none; }
}

/* ==========================================================
   v17.10.182 — Reliable mobile More menu
   Explicit JS toggling + fixed viewport panel prevents the menu from
   opening outside the horizontally scrolling navigation in Chrome mobile.
========================================================== */
@media (max-width: 1040px), (pointer: coarse) {
    #header .mode-more-menu,
    .test-nav-more-menu {
        position: fixed !important;
        z-index: 10050 !important;
        top: var(--site-more-top, 118px) !important;
        right: 12px !important;
        bottom: auto !important;
        left: 12px !important;
        width: auto !important;
        max-width: none !important;
        max-height: min(var(--site-more-max-height, 70vh), 480px) !important;
        margin: 0 !important;
        overflow-x: hidden !important;
        overflow-y: auto !important;
        overscroll-behavior: contain;
        -webkit-overflow-scrolling: touch;
        border-radius: 16px;
        box-shadow: 0 20px 52px rgba(15, 23, 42, .24);
    }

    #header .mode-more[open] > summary.mode-button,
    .test-nav-more[open] > summary {
        color: var(--primary, #1769ff);
        background: var(--surface-alt, #f2f7ff);
        border-color: var(--border, #dbe4f0);
    }
}

/* v17.10.327: readable hover, open and keyboard-focus states in both dark modes. */
html[data-theme="dark"] #header .lesson-home-nav-button:is(:hover,:focus-visible),
html[data-theme="dark"] #header .mode-navigation > .mode-button:is(:hover,:focus-visible),
html[data-theme="dark"] #header .mode-more > summary.mode-button:is(:hover,:focus-visible),
html[data-theme="dark"] #header .mode-more[open] > summary.mode-button,
html[data-theme="dark"] .test-nav > a:is(:hover,:focus-visible),
html[data-theme="dark"] .test-nav-more > summary:is(:hover,:focus-visible),
html[data-theme="dark"] .test-nav-more[open] > summary,
html[data-theme="dark"] #header .mode-more-menu .mode-button:is(:hover,:focus-visible),
html[data-theme="dark"] .test-nav-more-menu a:is(:hover,:focus-visible),
html[data-theme="dark"] .test-nav-more-menu button:is(:hover,:focus-visible) {
    color: #e7eef9;
    background: #213a5f;
    border-color: #526d91;
    text-decoration: none;
}
@media (prefers-color-scheme: dark) {
html[data-theme="system"] #header .lesson-home-nav-button:is(:hover,:focus-visible),
html[data-theme="system"] #header .mode-navigation > .mode-button:is(:hover,:focus-visible),
html[data-theme="system"] #header .mode-more > summary.mode-button:is(:hover,:focus-visible),
html[data-theme="system"] #header .mode-more[open] > summary.mode-button,
html[data-theme="system"] .test-nav > a:is(:hover,:focus-visible),
html[data-theme="system"] .test-nav-more > summary:is(:hover,:focus-visible),
html[data-theme="system"] .test-nav-more[open] > summary,
html[data-theme="system"] #header .mode-more-menu .mode-button:is(:hover,:focus-visible),
html[data-theme="system"] .test-nav-more-menu a:is(:hover,:focus-visible),
html[data-theme="system"] .test-nav-more-menu button:is(:hover,:focus-visible) {
    color: #e7eef9;
    background: #213a5f;
    border-color: #526d91;
    text-decoration: none;
}
}

/* Source: /css/universal-logo-visibility-v17.7.6.css */
/* ==========================================================
   TypingTutor.Online — Universal Logo Visibility v17.7.6

   Nested sections use two theme-aware logo images inside
   .test-logo-stack. Older section styles mixed absolute
   positioning, display switching and opacity switching, which
   could collapse the logo container or hide both images.

   This final stylesheet creates one stable overlapping grid,
   reserves the correct header space and switches only opacity.
========================================================== */

.test-logo {
    box-sizing: border-box !important;
    width: min(280px, 100%) !important;
    min-width: 190px !important;
    min-height: 58px !important;
    display: flex !important;
    align-items: center !important;
    justify-content: flex-start !important;
    overflow: visible !important;
}

.test-logo-stack {
    box-sizing: border-box !important;
    position: relative !important;
    display: grid !important;
    grid-template-columns: minmax(0, 1fr) !important;
    grid-template-rows: minmax(0, 1fr) !important;
    width: 280px !important;
    max-width: 100% !important;
    min-width: 190px !important;
    min-height: 58px !important;
    aspect-ratio: 280 / 58 !important;
    overflow: visible !important;
    isolation: isolate;
}

.test-logo-stack > .test-logo-light,
.test-logo-stack > .test-logo-dark {
    box-sizing: border-box !important;
    grid-area: 1 / 1 !important;
    position: static !important;
    inset: auto !important;
    z-index: 1;
    display: block !important;
    width: 100% !important;
    max-width: 280px !important;
    height: 100% !important;
    min-height: 0 !important;
    max-height: 58px !important;
    margin: 0 !important;
    object-fit: contain !important;
    object-position: left center !important;
    pointer-events: none !important;
    transition: opacity .16s ease, visibility .16s ease !important;
}

/* Reliable default, including pages before ThemeManager runs. */
.test-logo-stack > .test-logo-light {
    opacity: 1 !important;
    visibility: visible !important;
}

.test-logo-stack > .test-logo-dark {
    opacity: 0 !important;
    visibility: hidden !important;
}

html[data-theme="light"] .test-logo-stack > .test-logo-light,
html[data-resolved-theme="light"] .test-logo-stack > .test-logo-light {
    opacity: 1 !important;
    visibility: visible !important;
}

html[data-theme="light"] .test-logo-stack > .test-logo-dark,
html[data-resolved-theme="light"] .test-logo-stack > .test-logo-dark {
    opacity: 0 !important;
    visibility: hidden !important;
}

html[data-theme="dark"] .test-logo-stack > .test-logo-light,
html[data-resolved-theme="dark"] .test-logo-stack > .test-logo-light {
    opacity: 0 !important;
    visibility: hidden !important;
}

html[data-theme="dark"] .test-logo-stack > .test-logo-dark,
html[data-resolved-theme="dark"] .test-logo-stack > .test-logo-dark {
    opacity: 1 !important;
    visibility: visible !important;
}

@media (prefers-color-scheme: dark) {
    html[data-theme="system"] .test-logo-stack > .test-logo-light {
        opacity: 0 !important;
        visibility: hidden !important;
    }

    html[data-theme="system"] .test-logo-stack > .test-logo-dark {
        opacity: 1 !important;
        visibility: visible !important;
    }
}

@media (prefers-color-scheme: light) {
    html[data-theme="system"] .test-logo-stack > .test-logo-light {
        opacity: 1 !important;
        visibility: visible !important;
    }

    html[data-theme="system"] .test-logo-stack > .test-logo-dark {
        opacity: 0 !important;
        visibility: hidden !important;
    }
}

@media (max-width: 760px) {
    .test-logo {
        width: min(220px, 100%) !important;
        min-width: 165px !important;
        min-height: 46px !important;
    }

    .test-logo-stack {
        width: 220px !important;
        min-width: 165px !important;
        min-height: 46px !important;
    }

    .test-logo-stack > .test-logo-light,
    .test-logo-stack > .test-logo-dark {
        max-width: 220px !important;
        max-height: 46px !important;
    }
}

@media (max-width: 440px) {
    .test-logo {
        width: 178px !important;
        min-width: 150px !important;
        min-height: 37px !important;
    }

    .test-logo-stack {
        width: 178px !important;
        min-width: 150px !important;
        min-height: 37px !important;
    }

    .test-logo-stack > .test-logo-light,
    .test-logo-stack > .test-logo-dark {
        max-width: 178px !important;
        max-height: 37px !important;
    }
}

@media (prefers-reduced-motion: reduce) {
    .test-logo-stack > .test-logo-light,
    .test-logo-stack > .test-logo-dark {
        transition: none !important;
    }
}

/* Source: /css/universal-selection-v17.7.8.css */
/* ==========================================================
   TypingTutor.Online — high-contrast text selection v17.7.8
   ========================================================== */

/*
 * Use one strong, predictable selection treatment everywhere.
 * White text on saturated blue remains readable on both light and dark
 * surfaces and avoids the pale-selection/white-text conflict seen on blogs.
 */
*::selection {
    color: #ffffff !important;
    background: #075fe4 !important;
    text-shadow: none !important;
    -webkit-text-fill-color: #ffffff !important;
}

*::-moz-selection {
    color: #ffffff !important;
    background: #075fe4 !important;
    text-shadow: none !important;
}

input::selection,
textarea::selection,
[contenteditable="true"]::selection {
    color: #ffffff !important;
    background: #075fe4 !important;
    -webkit-text-fill-color: #ffffff !important;
}

input::-moz-selection,
textarea::-moz-selection,
[contenteditable="true"]::-moz-selection {
    color: #ffffff !important;
    background: #075fe4 !important;
}

/* Extra contrast for explicit dark mode and System mode on dark devices. */
html[data-theme="dark"] *::selection {
    color: #ffffff !important;
    background: #0057d9 !important;
    -webkit-text-fill-color: #ffffff !important;
}

html[data-theme="dark"] *::-moz-selection {
    color: #ffffff !important;
    background: #0057d9 !important;
}

@media (prefers-color-scheme: dark) {
    html[data-theme="system"] *::selection {
        color: #ffffff !important;
        background: #0057d9 !important;
        -webkit-text-fill-color: #ffffff !important;
    }

    html[data-theme="system"] *::-moz-selection {
        color: #ffffff !important;
        background: #0057d9 !important;
    }
}

/* Source: /css/global-workspace-v17.8.2.css */
/* ==========================================================
   TypingTutor.Online — Global Wide Workspace v17.8.2
   A consistent outer width across the tutor and every public
   section. Reading columns remain intentionally narrower.
========================================================== */

:root {
    --tto-workspace-max: 1500px;
    --tto-workspace-gutter: clamp(14px, 1.7vw, 32px);
    --max-width: var(--tto-workspace-max);
}

/* Main tutor, mode dashboards and progress bars */
.site-shell,
#courseModePanel,
.feature-placeholder,
#statisticsDashboard,
.statistics-course-progress,
.daily-practice-summary,
.settings-dashboard,
.achievements-dashboard,
.more-typing-resources-inner,
.typing-learning-content-inner {
    box-sizing: border-box;
    width: min(
        var(--tto-workspace-max),
        calc(100% - (2 * var(--tto-workspace-gutter)))
    );
    max-width: var(--tto-workspace-max);
    margin-inline: auto;
}

/* Standalone site sections */
.test-page-shell,
.games-shell,
.kids-shell,
.blog-shell,
.certificate-shell,
.share-shell,
.lessons-page-shell,
.page-shell {
    box-sizing: border-box;
    width: min(
        var(--tto-workspace-max),
        calc(100% - (2 * var(--tto-workspace-gutter)))
    );
    max-width: var(--tto-workspace-max);
    margin-inline: auto;
}

/* Footer follows the same visual edges as the page content. */
.universal-footer-inner,
.site-footer-inner {
    width: min(var(--tto-workspace-max), 100%);
    max-width: var(--tto-workspace-max);
}

/* Align horizontal section navigation with the wider workspace. */
.games-subnav,
.kids-subnav {
    padding-inline: max(
        var(--tto-workspace-gutter),
        calc((100vw - var(--tto-workspace-max)) / 2)
    );
}

/* Keep long-form reading comfortable even inside a wide shell. */
.blog-article,
.blog-article-body,
.page-prose,
.content-prose,
.certificate-faq > p,
.certificate-faq details,
.typing-learning-heading {
    max-width: 980px;
}

/* Wide desktop dashboards benefit from balanced multi-column cards. */
@media (min-width: 1280px) {
    .statistics-summary-grid-complete {
        grid-template-columns: repeat(6, minmax(0, 1fr));
    }

    .statistics-ranking-grid,
    .statistics-trend-grid {
        gap: 18px;
    }

    .games-grid,
    .kids-path-grid,
    .kids-feature-grid,
    .kids-test-grid,
    .kids-game-grid,
    .kids-badge-grid {
        gap: 20px;
    }
}

/* Maintain generous but safe gutters on tablets and phones. */
@media (max-width: 900px) {
    :root {
        --tto-workspace-gutter: 11px;
    }
}

@media (max-width: 560px) {
    :root {
        --tto-workspace-gutter: 7px;
    }
}

@media print {
    .certificate-shell,
    .kids-shell,
    .page-shell {
        width: 100% !important;
        max-width: none !important;
    }
}

/* Source: /css/seo-visuals-v17.8.48.css */
/* TypingTutor.Online v17.8.48 — responsive SEO / learning visuals */
.content-visual {
  margin: 28px 0 34px;
}
.content-visual img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border: 1px solid var(--border, #dbe4f0);
  border-radius: 20px;
  background: var(--surface-alt, #f8fafc);
  box-shadow: 0 14px 34px rgba(15, 23, 42, .08);
}
.content-visual figcaption {
  margin: 10px 4px 0;
  color: var(--text-light, #64748b);
  font-size: .86rem;
  line-height: 1.55;
}
.content-visual--compact {
  max-width: 1120px;
  margin-left: auto;
  margin-right: auto;
}
.content-visual--hero {
  margin-top: 24px;
}
.visual-note {
  margin: 20px 0 30px;
  padding: 16px 18px;
  border: 1px solid rgba(23,105,255,.18);
  border-radius: 16px;
  background: var(--primary-light, #eaf1ff);
  color: var(--text-light, #475569);
  line-height: 1.65;
}
.visual-note strong { color: var(--text, #0f172a); }
html[data-theme="dark"] .content-visual img {
  border-color: var(--border, #334155);
  box-shadow: 0 14px 34px rgba(0,0,0,.28);
}
@media (max-width: 700px) {
  .content-visual { margin: 20px 0 26px; }
  .content-visual img { border-radius: 14px; }
  .content-visual figcaption { font-size: .8rem; }
}