/* 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-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/site-account-header-v17.10.311.css */
/* Shared account action. Reserve space before JavaScript runs. */
#header .header-tools, .test-header-inner > .site-header-actions {
 display:flex !important; align-items:center; justify-content:flex-end; gap:8px;
 justify-self:end; min-width:0;
}
#header .site-account-link, .test-site-header .site-account-link {
 box-sizing:border-box; display:inline-flex; align-items:center; justify-content:center; gap:7px;
 min-height:48px; min-width:118px; padding:10px 12px; border:1px solid var(--border,#c9d8ed);
 border-radius:12px; background:var(--surface-alt,#f2f7ff); color:var(--text,#172235);
 font:750 13px/1 system-ui,sans-serif; text-decoration:none; white-space:nowrap; flex-shrink:0;
}
.site-account-link svg {flex-shrink:0;}
#header .site-account-link:hover, .test-site-header .site-account-link:hover {border-color:#246df0; background:#e7f0ff; color:#1747a6; text-decoration:none;}
.site-account-link:focus-visible {outline:3px solid #246df0; outline-offset:3px;}
.test-header-inner > .site-header-actions > #themeButton {
 box-sizing:border-box; display:inline-flex; align-items:center; justify-content:center; gap:8px;
 min-width:116px; min-height:48px; padding:10px 15px; margin:0; border:0; border-radius:12px;
 background:linear-gradient(135deg,#246df0,#285ee5); color:white; font:750 13px/1 system-ui,sans-serif;
 cursor:pointer; white-space:nowrap;
}
html[data-theme="dark"] .site-account-link {background:#182a43; color:#e7eef9; border-color:#526783;}
html[data-theme="dark"] .site-account-link:hover {background:#213a5f; color:white;}
@media (max-width:1200px) {
 #header .header-inner, .test-header-inner {grid-template-columns:minmax(0,1fr) auto !important;}
 #header .primary-mode-navigation, .test-nav {grid-column:1 / -1; grid-row:2;}
 #header .header-tools, .test-header-inner > .site-header-actions {grid-column:2; grid-row:1;}
}
@media (max-width:590px) {
 #header .site-account-link, .test-site-header .site-account-link {min-width:44px; width:44px; min-height:44px; padding:10px;}
 .site-account-label {position:absolute; width:1px; height:1px; padding:0; margin:-1px; overflow:hidden; clip-path:inset(50%); white-space:nowrap;}
 #header .header-tools, .test-header-inner > .site-header-actions {gap:6px;}
 #header #themeButton, .test-header-inner > .site-header-actions > #themeButton {min-width:44px; width:44px; min-height:44px; padding:8px !important;}
 .test-header-inner > .site-header-actions > #themeButton > span:not(:first-child) {display:none;}
}

/* v17.10.317 — green account action after server-confirmed sign-in. */
#header .site-account-link[data-signed-in="true"],
.test-site-header .site-account-link[data-signed-in="true"] {
 background:#15803d; color:#fff; border-color:#15803d;
}
#header .site-account-link[data-signed-in="true"]:hover,
.test-site-header .site-account-link[data-signed-in="true"]:hover {
 background:#166534; color:#fff; border-color:#166534;
}
html[data-theme="dark"] #header .site-account-link[data-signed-in="true"],
html[data-theme="dark"] .test-site-header .site-account-link[data-signed-in="true"] {
 background:#166534; color:#fff; border-color:#22c55e;
}
html[data-theme="dark"] #header .site-account-link[data-signed-in="true"]:hover,
html[data-theme="dark"] .test-site-header .site-account-link[data-signed-in="true"]:hover {
 background:#14532d; color:#fff;
}

/* Source: /school/guide-v17.10.415.css */
:root{--guide-bg:#f4f7fc;--guide-surface:#fff;--guide-text:#192c48;--guide-muted:#526680;--guide-border:#d7e2f0;--guide-soft:#edf4ff;color-scheme:light}html[data-theme="dark"]{--guide-bg:#0d1728;--guide-surface:#15243b;--guide-text:#e7eefb;--guide-muted:#b8c8dd;--guide-border:#3d526e;--guide-soft:#1b3554;color-scheme:dark}*{box-sizing:border-box}body{margin:0;background:var(--guide-bg);color:var(--guide-text);font:17px/1.7 system-ui,-apple-system,"Segoe UI",sans-serif}a{color:#205bbd;text-underline-offset:3px}html[data-theme="dark"] a{color:#a8d0ff}a:focus-visible,summary:focus-visible{outline:3px solid #d68b0c;outline-offset:4px}.guide-skip{position:absolute;top:-100px;left:16px;padding:12px;background:#fff;z-index:10000}.guide-skip:focus{top:12px}#guide-main{max-width:1500px;margin:auto;padding:22px 28px 60px}.guide-breadcrumb{display:flex;flex-wrap:wrap;gap:8px 12px;font-size:14px;margin-bottom:18px}.guide-hero{display:grid;grid-template-columns:minmax(0,1fr) 230px;align-items:center;gap:36px;padding:26px 32px;background:var(--guide-surface);border:1px solid var(--guide-border);border-radius:20px}.guide-eyebrow{font-size:12px;letter-spacing:.1em;font-weight:800;color:var(--guide-muted);margin:0 0 8px}h1,h2,h3{line-height:1.25;letter-spacing:-.015em}.guide-hero h1{font-size:clamp(29px,3vw,40px);margin:8px 0 15px;max-width:900px}.guide-hero p{max-width:880px;margin:10px 0}.guide-meta,.guide-small{font-size:14px;color:var(--guide-muted)}.guide-actions{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0}.guide-button{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:10px 17px;background:#215bd0;color:#fff!important;border:1px solid #215bd0;border-radius:10px;text-decoration:none;font-size:15px;font-weight:750;line-height:1.4}.guide-button.secondary{background:var(--guide-surface);color:var(--guide-text)!important;border-color:var(--guide-border)}.guide-free-note{font-size:14px;font-weight:700;color:#17603d}.guide-cover{justify-self:center;display:block;width:198px;box-shadow:0 10px 25px #19395720;transform:rotate(2deg)}.guide-cover img{display:block;width:100%;height:auto}.guide-toc{background:var(--guide-surface);border:1px solid var(--guide-border);border-radius:12px;padding:16px 22px;margin:22px 0}.guide-toc summary{cursor:pointer;font-weight:750}.guide-toc ol{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px 28px;padding-left:22px;font-size:15px}#guide-content{max-width:1180px;margin:auto}.guide-panel{background:var(--guide-surface);border:1px solid var(--guide-border);border-radius:17px;padding:28px 32px;margin:22px 0;scroll-margin-top:22px}.guide-panel h2{font-size:28px;margin:8px 0 16px}.guide-panel h3{font-size:19px;margin:12px 0}.guide-panel p{max-width:90ch}.guide-paths{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin:24px 0}.guide-paths article{padding:18px;border-radius:12px;background:var(--guide-soft);font-size:15px}.guide-paths article h3{margin:0 0 8px}.guide-paths article a{font-weight:700}.guide-steps{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px 38px;padding-left:25px;margin:25px 0}.guide-steps li{padding:0 8px 4px}.guide-steps li::marker{font-weight:800;color:#215bd0}.guide-steps h3{margin:0 0 8px}.guide-steps p{margin:0;font-size:16px}.guide-callout{padding:18px 20px;border-radius:12px;border-left:4px solid #2563eb;background:var(--guide-soft);margin:22px 0}.guide-callout h3{margin:0 0 8px}.guide-callout p{margin:0}.guide-table-wrap{overflow-x:auto;margin:24px 0}table{width:100%;border-collapse:collapse;font-size:15px;text-align:left}caption{text-align:left;font-weight:750;margin-bottom:10px}th,td{border:1px solid var(--guide-border);padding:13px 15px;vertical-align:top}th{background:var(--guide-soft);font-weight:750}td:first-child{font-weight:650;min-width:150px}.guide-panel li{margin-bottom:8px}.guide-checklist{list-style:none;padding:0}.guide-checklist li{display:flex;align-items:flex-start;gap:12px;padding:10px 0;border-bottom:1px solid var(--guide-border)}.guide-checklist span{color:#215bd0;font-size:24px;line-height:1.2}.guide-tips{font-size:15px;overflow-wrap:anywhere}.guide-test-note{padding:14px 18px;border:1px solid #bd8a2b;background:#fff7df;color:#614415;border-radius:10px;font-size:14px}.guide-faq{border-top:1px solid var(--guide-border);padding:15px 0}.guide-faq summary{font-weight:700;cursor:pointer}.guide-faq p{margin:12px 0 0}.guide-download{padding:26px 30px;margin:24px 0;border-radius:15px;background:var(--guide-soft);border:1px solid var(--guide-border)}.guide-download h2{margin-top:0;font-size:25px}html[data-theme="dark"] .guide-free-note{color:#b1e8c9}html[data-theme="dark"] .guide-test-note{background:#382d16;color:#ffe5aa;border-color:#a07a36}@media(max-width:900px){.guide-toc ol{grid-template-columns:repeat(2,minmax(0,1fr))}.guide-paths{grid-template-columns:1fr}.guide-hero{grid-template-columns:minmax(0,1fr) 160px;gap:20px;padding:22px}.guide-cover{width:145px}.guide-panel{padding:24px}.guide-steps{gap:16px 30px}}@media(max-width:640px){#guide-main{padding:16px 16px 40px}.guide-hero{display:block;padding:22px 18px}.guide-cover{display:none}.guide-hero h1{font-size:30px}.guide-panel{padding:22px 18px}.guide-panel h2{font-size:24px}.guide-steps,.guide-toc ol{grid-template-columns:1fr}.guide-actions .guide-button{flex:1 1 220px}.guide-paths article{padding:16px}.guide-toc{padding:14px 18px}.guide-table-wrap{font-size:14px}.guide-download{padding:22px 18px}}@media print{body{background:#fff;color:#111;font-size:10pt}.test-site-header,.universal-site-footer,.guide-actions,.guide-cover,.guide-toc,.guide-skip{display:none!important}#guide-main{max-width:none;padding:0}.guide-panel,.guide-hero,.guide-download{border:0;padding:8px 0;background:#fff;break-inside:auto}.guide-steps,.guide-paths{display:block}.guide-steps li,.guide-callout,table,.guide-paths article{break-inside:avoid}.guide-panel h2{font-size:18pt}.guide-panel h3{font-size:12pt}a{color:#111}.guide-faq{display:block}.guide-faq p{display:block!important}}