/* 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/site-pages.css */

:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --text: #152033;
    --muted: #5f6f86;
    --surface: #ffffff;
    --surface-alt: #f6f8fc;
    --border: #dfe6f0;
    --success: #15803d;
    --max-width: 1120px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    color: var(--text);
    background: var(--surface-alt);
    font-family:
        Inter,
        ui-sans-serif,
        system-ui,
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        sans-serif;
    line-height: 1.7;
}

a {
    color: var(--primary);
}

a:hover {
    color: var(--primary-dark);
}

.site-header {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
}

.site-header-inner,
.site-footer-inner,
.page-shell {
    width: min(var(--max-width), calc(100% - 28px));
    margin: 0 auto;
}

.site-header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    min-height: 82px;
}

.site-logo-image {
    display: block;
    width: 280px;
    max-width: 100%;
    height: auto;
}

.site-nav {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: flex-end;
    gap: 8px 18px;
}

.site-nav a {
    color: var(--text);
    font-size: 14px;
    font-weight: 700;
    text-decoration: none;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
    color: var(--primary);
}

.page-shell {
    padding: 38px 0 60px;
}

.page-hero,
.content-card,
.notice-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 18px;
    box-shadow: 0 12px 30px rgba(31, 48, 76, 0.06);
}

.page-hero {
    padding: clamp(26px, 5vw, 52px);
    margin-bottom: 18px;
}

.page-eyebrow {
    display: inline-block;
    margin-bottom: 8px;
    color: var(--primary);
    font-size: 12px;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.page-hero h1 {
    max-width: 820px;
    margin: 0 0 12px;
    font-size: clamp(32px, 5vw, 52px);
    line-height: 1.13;
}

.page-hero p {
    max-width: 820px;
    margin: 0;
    color: var(--muted);
    font-size: 18px;
}

.content-card {
    padding: clamp(22px, 4vw, 40px);
}

.content-card h2 {
    margin-top: 34px;
    margin-bottom: 8px;
    font-size: 25px;
    line-height: 1.25;
}

.content-card h2:first-child {
    margin-top: 0;
}

.content-card h3 {
    margin-top: 24px;
    margin-bottom: 6px;
    font-size: 19px;
}

.content-card p,
.content-card li {
    color: var(--muted);
}

.content-card ul,
.content-card ol {
    padding-left: 22px;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
    margin: 24px 0;
}

.feature-card {
    padding: 18px;
    background: var(--surface-alt);
    border: 1px solid var(--border);
    border-radius: 13px;
}

.feature-card h3 {
    margin: 0 0 6px;
    font-size: 17px;
}

.feature-card p {
    margin: 0;
    font-size: 14px;
}

.notice-card {
    margin-top: 18px;
    padding: 18px 22px;
}

.notice-card strong {
    color: var(--success);
}

.contact-options {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
    margin: 22px 0;
}

.contact-option {
    padding: 18px;
    background: var(--surface-alt);
    border: 1px solid var(--border);
    border-radius: 13px;
}

.contact-option h3 {
    margin: 0 0 4px;
}

.contact-option p {
    margin: 0;
}

.button-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 24px;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 10px 16px;
    color: #fff;
    background: var(--primary);
    border-radius: 10px;
    font-weight: 800;
    text-decoration: none;
}

.button:hover {
    color: #fff;
    background: var(--primary-dark);
}

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

.button.secondary:hover {
    color: var(--primary);
}

.site-footer {
    background: var(--surface);
    border-top: 1px solid var(--border);
}

.site-footer-inner {
    display: flex;
    justify-content: space-between;
    gap: 22px;
    padding: 26px 0;
    color: var(--muted);
    font-size: 13px;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 18px;
}

.footer-links a {
    color: var(--muted);
    text-decoration: none;
}

.footer-links a:hover {
    color: var(--primary);
}

.last-updated {
    color: var(--muted);
    font-size: 13px;
}

@media (max-width: 820px) {
    .site-header-inner {
        align-items: flex-start;
        flex-direction: column;
        padding: 16px 0;
    }

    .site-nav {
        justify-content: flex-start;
    }

    .feature-grid,
    .contact-options {
        grid-template-columns: 1fr;
    }

    .site-footer-inner {
        flex-direction: column;
    }
}

@media (max-width: 560px) {
    .site-logo-image {
        width: 170px;
    }

    .page-shell {
        padding-top: 22px;
    }

    .page-hero,
    .content-card {
        border-radius: 14px;
    }
}


/* ==========================================================
   v17.8.55 — Theme-safe standalone/site pages
========================================================== */
html[data-theme="dark"]{
    --primary:#6ea0ff;
    --primary-dark:#93b5ff;
    --text:#f1f5f9;
    --muted:#aab8cc;
    --surface:#111827;
    --surface-alt:#0b1120;
    --border:#334155;
    --success:#4ade80;
}
html[data-theme="dark"] body{
    color:var(--text);
    background:var(--surface-alt);
}
html[data-theme="dark"] .page-hero,
html[data-theme="dark"] .content-card,
html[data-theme="dark"] .notice-card{
    box-shadow:0 16px 34px rgba(0,0,0,.24);
}
@media (prefers-color-scheme:dark){
    html[data-theme="system"]{
        --primary:#6ea0ff;
        --primary-dark:#93b5ff;
        --text:#f1f5f9;
        --muted:#aab8cc;
        --surface:#111827;
        --surface-alt:#0b1120;
        --border:#334155;
        --success:#4ade80;
    }
    html[data-theme="system"] body{
        color:var(--text);
        background:var(--surface-alt);
    }
    html[data-theme="system"] .page-hero,
    html[data-theme="system"] .content-card,
    html[data-theme="system"] .notice-card{
        box-shadow:0 16px 34px rgba(0,0,0,.24);
    }
}

/* 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/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/typing-tools-v17.8.74.css */

/* v17.10.24: tools use the global 1500px workspace width */
.typing-tools-shell{box-sizing:border-box;width:min(var(--tto-workspace-max,1500px),calc(100% - (2 * var(--tto-workspace-gutter,clamp(14px,1.7vw,32px)))));max-width:var(--tto-workspace-max,1500px);margin:0 auto;padding:22px 0 56px}.typing-tools-subnav{display:flex;gap:8px;overflow-x:auto;padding:10px max(var(--tto-workspace-gutter,clamp(14px,1.7vw,32px)),calc((100vw - var(--tto-workspace-max,1500px))/2));background:var(--surface-primary,#fff);border-bottom:1px solid var(--border-subtle,#e5e7eb);position:relative;z-index:3;scrollbar-width:thin}.typing-tools-subnav a{flex:0 0 auto;text-decoration:none;color:var(--text-secondary,#475569);font-weight:700;font-size:.88rem;padding:8px 12px;border-radius:10px;border:1px solid transparent}.typing-tools-subnav a:hover,.typing-tools-subnav a.is-active{color:var(--primary,#1769ff);background:color-mix(in srgb,var(--primary,#1769ff) 9%,transparent);border-color:color-mix(in srgb,var(--primary,#1769ff) 18%,transparent)}
.typing-tools-breadcrumbs{font-size:.84rem;color:var(--text-muted,#64748b);margin:2px 0 14px}.typing-tools-breadcrumbs a{color:inherit}.typing-tools-hero{display:grid;grid-template-columns:1fr auto;gap:24px;align-items:center;padding:30px;border:1px solid var(--border-subtle,#e2e8f0);border-radius:22px;background:linear-gradient(135deg,color-mix(in srgb,var(--primary,#1769ff) 7%,var(--surface-primary,#fff)),var(--surface-primary,#fff));box-shadow:0 18px 50px rgba(15,23,42,.06);margin-bottom:22px}.typing-tools-eyebrow,.section-heading>span{display:inline-flex;font-size:.78rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:var(--primary,#1769ff);margin-bottom:7px}.typing-tools-hero h1{font-size:clamp(1.85rem,4vw,3rem);line-height:1.06;margin:0 0 12px}.typing-tools-hero p{max-width:780px;margin:0;color:var(--text-secondary,#475569);font-size:1.02rem;line-height:1.7}.typing-tools-hero-badge{width:82px;height:82px;border-radius:22px;display:grid;place-items:center;font-size:2.4rem;background:var(--surface-primary,#fff);border:1px solid var(--border-subtle,#e2e8f0);box-shadow:0 12px 30px rgba(15,23,42,.08)}
.tool-grid{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(280px,.95fr);gap:20px;align-items:start}.calculator-card,.result-panel,.typing-tool-section,.typing-tool-related,.guide-card,.resource-hub-card{background:var(--surface-primary,#fff);border:1px solid var(--border-subtle,#e2e8f0);border-radius:18px;padding:22px;box-shadow:0 10px 28px rgba(15,23,42,.04)}.calculator-card h2,.result-panel h2,.typing-tool-section h2,.typing-tool-related h2{margin-top:0}.field-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.field{display:flex;flex-direction:column;gap:7px}.field label{font-weight:750;font-size:.9rem}.field input,.field select{width:100%;min-height:46px;border:1px solid var(--border-subtle,#cbd5e1);border-radius:11px;background:var(--surface-secondary,#f8fafc);color:var(--text-primary,#0f172a);padding:10px 12px;font:inherit}.field input:focus,.field select:focus{outline:3px solid color-mix(in srgb,var(--primary,#1769ff) 18%,transparent);border-color:var(--primary,#1769ff)}.field small{color:var(--text-muted,#64748b)}.tool-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}.tool-button{border:0;border-radius:11px;padding:11px 16px;font-weight:800;cursor:pointer;background:var(--primary,#1769ff);color:#fff}.tool-button.secondary{background:var(--surface-secondary,#f1f5f9);color:var(--text-primary,#0f172a);border:1px solid var(--border-subtle,#cbd5e1)}.result-panel{position:sticky;top:16px}.result-big{font-size:clamp(2.5rem,7vw,4.6rem);line-height:1;font-weight:850;letter-spacing:-.04em;color:var(--primary,#1769ff);margin:10px 0 4px}.result-unit{font-weight:800;color:var(--text-secondary,#475569)}.result-note{color:var(--text-muted,#64748b);line-height:1.55}.result-mini-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin-top:18px}.result-mini{padding:12px;border-radius:12px;background:var(--surface-secondary,#f8fafc);border:1px solid var(--border-subtle,#e2e8f0)}.result-mini span{display:block;font-size:.78rem;color:var(--text-muted,#64748b)}.result-mini strong{font-size:1.15rem}.formula-box{margin:16px 0 0;padding:13px 15px;border-radius:12px;background:color-mix(in srgb,var(--primary,#1769ff) 8%,transparent);border:1px solid color-mix(in srgb,var(--primary,#1769ff) 16%,transparent);font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-weight:700;overflow-wrap:anywhere}.typing-tool-section{margin-top:20px}.typing-tool-section p,.typing-tool-section li{color:var(--text-secondary,#475569);line-height:1.75}.typing-tool-section ul,.typing-tool-section ol{padding-left:1.25rem}.section-heading h2{margin:.1rem 0 .65rem}.explain-grid,.hub-grid,.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.explain-card,.hub-grid a,.related-grid a{padding:17px;border-radius:14px;background:var(--surface-secondary,#f8fafc);border:1px solid var(--border-subtle,#e2e8f0)}.hub-grid a,.related-grid a{text-decoration:none;color:inherit;display:flex;flex-direction:column;gap:6px}.hub-grid a:hover,.related-grid a:hover{border-color:var(--primary,#1769ff);transform:translateY(-1px)}.hub-grid strong,.related-grid strong{font-size:1.02rem}.hub-grid span,.related-grid span{color:var(--text-muted,#64748b);line-height:1.5;font-size:.9rem}.typing-tool-related{margin-top:20px}.faq-stack{display:grid;gap:10px}.faq-stack details{border:1px solid var(--border-subtle,#e2e8f0);border-radius:12px;padding:12px 14px;background:var(--surface-secondary,#f8fafc)}.faq-stack summary{font-weight:800;cursor:pointer}.faq-stack p{margin:.7rem 0 .1rem}
.keyboard-layout-controls{display:flex;flex-wrap:wrap;gap:8px;margin:4px 0 16px}.keyboard-layout-controls button{border:1px solid var(--border-subtle,#cbd5e1);background:var(--surface-secondary,#f8fafc);color:var(--text-primary,#0f172a);border-radius:10px;padding:8px 12px;font-weight:800;cursor:pointer}.keyboard-layout-controls button.is-active{background:var(--primary,#1769ff);color:#fff;border-color:var(--primary,#1769ff)}.keyboard-visual{display:grid;gap:8px;overflow-x:auto;padding:8px 2px 4px}.keyboard-row{display:flex;gap:6px;min-width:690px}.keyboard-key{min-width:46px;height:46px;border:1px solid var(--border-subtle,#cbd5e1);background:var(--surface-secondary,#f8fafc);border-radius:9px;display:grid;place-items:center;font-weight:800;box-shadow:0 2px 0 rgba(15,23,42,.08)}.keyboard-key.wide{min-width:72px}.keyboard-key.space{min-width:250px}.keyboard-key.home{outline:2px solid color-mix(in srgb,var(--primary,#1769ff) 55%,transparent);outline-offset:1px}.layout-note{margin-top:14px;color:var(--text-secondary,#475569)}.finger-legend{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:9px;margin:14px 0}.finger-legend div{padding:11px;border-radius:11px;background:var(--surface-secondary,#f8fafc);border:1px solid var(--border-subtle,#e2e8f0);text-align:center;font-size:.82rem;font-weight:800}.finger-lp,.finger-rp{background:color-mix(in srgb,#ef4444 10%,var(--surface-secondary,#f8fafc))}.finger-lr,.finger-rr{background:color-mix(in srgb,#f59e0b 11%,var(--surface-secondary,#f8fafc))}.finger-lm,.finger-rm{background:color-mix(in srgb,#10b981 10%,var(--surface-secondary,#f8fafc))}.finger-li,.finger-ri{background:color-mix(in srgb,#3b82f6 10%,var(--surface-secondary,#f8fafc))}.finger-thumb{background:color-mix(in srgb,#8b5cf6 10%,var(--surface-secondary,#f8fafc))}.home-bumps{font-size:.72rem;color:var(--primary,#1769ff);display:block;line-height:1;margin-top:-8px}.callout{padding:15px 17px;border-left:4px solid var(--primary,#1769ff);background:color-mix(in srgb,var(--primary,#1769ff) 7%,transparent);border-radius:10px;margin:16px 0}.status-message{min-height:1.2em;margin-top:10px;font-size:.87rem;color:var(--text-muted,#64748b)}
@media(max-width:860px){.tool-grid{grid-template-columns:1fr}.result-panel{position:static}.explain-grid,.hub-grid,.related-grid{grid-template-columns:1fr 1fr}.typing-tools-hero{grid-template-columns:1fr}.typing-tools-hero-badge{display:none}.finger-legend{grid-template-columns:repeat(2,1fr)}}@media(max-width:560px){.typing-tools-shell{width:min(100% - 14px,var(--tto-workspace-max,1500px));padding-top:14px}.typing-tools-hero,.calculator-card,.result-panel,.typing-tool-section,.typing-tool-related{padding:17px;border-radius:15px}.field-grid,.explain-grid,.hub-grid,.related-grid,.result-mini-grid{grid-template-columns:1fr}.typing-tools-hero h1{font-size:1.8rem}.typing-tools-subnav{padding-inline:10px}.finger-legend{grid-template-columns:1fr 1fr}}
html[data-theme="dark"] .typing-tools-hero,html[data-theme="dark"] .calculator-card,html[data-theme="dark"] .result-panel,html[data-theme="dark"] .typing-tool-section,html[data-theme="dark"] .typing-tool-related,html[data-theme="dark"] .guide-card,html[data-theme="dark"] .resource-hub-card{box-shadow:none}

/* v17.10.20: Typing Practice hub — global workspace width and light section colors */
.typing-practice-hub{width:min(1500px,calc(100% - clamp(28px,5vw,72px)))}
.typing-practice-hub .typing-tools-hero{background:linear-gradient(135deg,#eff6ff 0%,#f8fbff 48%,#f5f3ff 100%);border-color:#cfe0ff}
.typing-practice-hub>.typing-tool-section,.typing-practice-hub>.typing-tool-related,.typing-practice-hub>.practice-seo-card{border:1px solid #dbe4f0;border-radius:20px;padding:22px;box-shadow:0 10px 28px rgba(15,23,42,.04)}
.typing-practice-hub>.typing-tool-section:nth-of-type(2){background:#eff8ff;border-color:#cfe8ff}
.typing-practice-hub>.typing-tool-section:nth-of-type(3){background:#effcf7;border-color:#ccefe0}
.typing-practice-hub>.typing-tool-section:nth-of-type(4){background:#f7f4ff;border-color:#e0d7ff}
.typing-practice-hub>.typing-tool-section:nth-of-type(5){background:#fff9ed;border-color:#f2e4bd}
.typing-practice-hub>.typing-tool-section:nth-of-type(6){background:#effbfd;border-color:#ccecf1}
.typing-practice-hub>.typing-tool-section:nth-of-type(7){background:#f2fbf4;border-color:#d1ecd7}
.typing-practice-hub>.typing-tool-section:nth-of-type(8){background:#f7f5ff;border-color:#ded8f8}
.typing-practice-hub>.typing-tool-section:nth-of-type(9){background:#f2f8ff;border-color:#d5e5f8}
.typing-practice-hub>.typing-tool-related:nth-of-type(10){background:#fff9ef;border-color:#f1e1c2}
.typing-practice-hub>.typing-tool-related:nth-of-type(11){background:#effbf6;border-color:#cfe9da}
.typing-practice-hub>.practice-seo-card:nth-of-type(12){background:#f2fbfd;border-color:#d1e9ee}
.typing-practice-hub>.practice-seo-card:nth-of-type(13){background:#fff5f8;border-color:#f1d9e2}
.typing-practice-hub .hub-grid{grid-template-columns:repeat(4,minmax(0,1fr))}
.typing-practice-hub .typing-tool-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
.typing-practice-hub .typing-tool-grid a{display:flex;flex-direction:column;gap:6px;padding:17px;border-radius:14px;background:rgba(255,255,255,.78);border:1px solid rgba(203,213,225,.9);text-decoration:none;color:inherit}
.typing-practice-hub .typing-tool-grid a:hover{border-color:var(--primary,#1769ff);transform:translateY(-1px)}
.typing-practice-hub .typing-tool-grid span{color:var(--text-muted,#64748b);line-height:1.5;font-size:.9rem}
.typing-practice-hub>.typing-tool-section .hub-grid a,.typing-practice-hub>.typing-tool-section .related-grid a,.typing-practice-hub>.typing-tool-related .related-grid a{background:rgba(255,255,255,.78)}
.typing-practice-hub .practice-seo-card{margin-top:20px}
.typing-practice-hub .practice-seo-card h2{margin-top:0}
.typing-practice-hub .practice-seo-card p{color:var(--text-secondary,#475569);line-height:1.75}
.typing-practice-hub .practice-seo-card a{color:var(--primary,#1769ff);font-weight:700}
@media(max-width:1180px){.typing-practice-hub .hub-grid,.typing-practice-hub .typing-tool-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(max-width:860px){.typing-practice-hub .hub-grid,.typing-practice-hub .typing-tool-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:560px){.typing-practice-hub{width:min(100% - 20px,1500px)}.typing-practice-hub .hub-grid,.typing-practice-hub .typing-tool-grid{grid-template-columns:1fr}.typing-practice-hub>.typing-tool-section,.typing-practice-hub>.typing-tool-related,.typing-practice-hub>.practice-seo-card{padding:17px;border-radius:15px}}
html[data-theme="dark"] .typing-practice-hub>.typing-tool-section,html[data-theme="dark"] .typing-practice-hub>.typing-tool-related,html[data-theme="dark"] .typing-practice-hub>.practice-seo-card{background:#111827;border-color:#334155}
html[data-theme="dark"] .typing-practice-hub .typing-tool-grid a{background:#172033;border-color:#334155}


/* v17.10.21: repaired bottom Typing Practice resource cards */
.typing-practice-hub>.practice-seo-card.typing-tool-section{display:block;margin-top:20px;padding:clamp(20px,2.4vw,30px);border-radius:20px;box-shadow:0 10px 28px rgba(15,23,42,.04)}
.typing-practice-hub>.practice-seo-card--rows{background:linear-gradient(135deg,#f2fbfd 0%,#f7fcff 100%);border-color:#cfe9ef}
.typing-practice-hub>.practice-seo-card--focus{background:linear-gradient(135deg,#fff5f8 0%,#fff9fb 100%);border-color:#efd8e2}
.typing-practice-hub>.practice-seo-card .section-heading{margin-bottom:10px}
.typing-practice-hub>.practice-seo-card .section-heading>span{display:block;margin-bottom:5px;color:#1769ff;font-size:.72rem;font-weight:850;letter-spacing:.08em;text-transform:uppercase}
.typing-practice-hub>.practice-seo-card .section-heading h2{margin:0;font-size:clamp(1.45rem,2.4vw,2rem);line-height:1.18}
.typing-practice-hub>.practice-seo-card .practice-seo-lead{margin-top:0;padding:12px 14px;border-radius:12px;background:rgba(255,255,255,.7);border:1px solid rgba(203,213,225,.72)}
html[data-theme="dark"] .typing-practice-hub>.practice-seo-card--rows,html[data-theme="dark"] .typing-practice-hub>.practice-seo-card--focus{background:#111827;border-color:#334155}
@media(prefers-color-scheme:dark){html[data-theme="system"] .typing-practice-hub>.practice-seo-card--rows,html[data-theme="system"] .typing-practice-hub>.practice-seo-card--focus{background:#111827;border-color:#334155}}