/* ============================================================================
   4Programmer design system (2026 rebrand)
   Hand-authored, no build step. Loaded after the legacy stylesheets during the
   migration so its rules win; once every view is rewritten the legacy files
   (bootstrap.min.css, style.css, custom.css, rtl.css, icofont.min.css) are
   removed and this file stands alone.

   Conventions:
   - New namespace only (.site-header, .course-card, ...). Never reuse legacy
     class names (headerarea__*, gridarea__*, .btn, .row, .col-*) so the two
     systems cannot fight while they coexist.
   - Logical properties everywhere (inline-start/end, block-start/end) so the
     Arabic RTL locale mirrors for free; the handful of direction-specific
     rules live at the very bottom.
   - Colors, radii and fonts come from the :root tokens below.
   ========================================================================= */

:root {
    /* surfaces */
    --bg: #fbfaf7;
    --surface: #ffffff;
    --band: #f2f0e9;
    --dark: #0d1f15;
    --dark-2: #173324;
    --dark-panel: #101d14;
    /* ink */
    --ink: #17251d;
    --muted: #5a6459;
    --faint: #7a8479;
    --ink-on-dark: #f2f7f0;
    --muted-on-dark: #b9c9bd;
    --faint-on-dark: #8aa392;
    /* greens */
    --link: #0f8a4b;
    --link-hover: #0b6b3a;
    --cta: #4ade80;
    --cta-hover: #6ee89a;
    --mint: #8df0a8;
    --badge-bg: #e8f7ee;
    --row-hover: #f6fbf7;
    /* borders */
    --border: #e6e4dc;
    --hairline: #efede6;
    --border-dark: #274232;
    --border-dark-2: #2c4534;
    --input-dark: #122a1c;
    /* shape */
    --r-card: 16px;
    --r-btn: 12px;
    --r-btn-sm: 10px;
    --r-badge: 6px;
    --r-pill: 19px;
    /* type */
    --font-head: "Bricolage Grotesque", "IBM Plex Sans Arabic", sans-serif;
    --font-body: "Inter Tight", "IBM Plex Sans Arabic", sans-serif;
    --font-mono: "JetBrains Mono", monospace;
    --tracking-head: -0.02em;
    --tracking-tight: -0.025em;
}

/* Arabic: Bricolage Grotesque and Inter Tight have no Arabic glyphs, and
   negative tracking harms connected script. JetBrains Mono stays for digits. */
:lang(ar) {
    --font-head: "IBM Plex Sans Arabic", sans-serif;
    --font-body: "IBM Plex Sans Arabic", sans-serif;
    --tracking-head: 0;
    --tracking-tight: 0;
}

/* ---------------------------------------------------------------------------
   Reset / base
   ------------------------------------------------------------------------ */

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

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

body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
}

::selection { background: #c9f3da; }

img, svg, video { max-width: 100%; height: auto; }

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-head);
    letter-spacing: var(--tracking-head);
    color: var(--ink);
    line-height: 1.15;
    margin: 0 0 0.5em;
    text-wrap: balance;
}

p { margin: 0 0 1em; }

a {
    color: var(--link);
    text-decoration: none;
    transition: color 0.15s ease;
}
a:hover { color: var(--link-hover); }

/* WCAG: in-content links must not rely on color alone (ported from the old
   custom.css a11y pass). Nav, cards, buttons have other affordances. */
.prose a, .topic__intro a, .site-footer__credit a { text-decoration: underline; }

button { font: inherit; color: inherit; }

:focus-visible {
    outline: 2px solid var(--link);
    outline-offset: 2px;
    border-radius: 2px;
}

.visually-hidden {
    position: absolute !important;
    width: 1px; height: 1px;
    margin: -1px; padding: 0;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
    border: 0;
}

/* Mixed-script titles (e.g. "Adobe Photoshop CS6 dawra kamila"): let each
   heading pick its direction from its first strong character. Ported fix. */
.course-card__title, .mixed-bidi { unicode-bidi: plaintext; }

/* ---------------------------------------------------------------------------
   Layout
   ------------------------------------------------------------------------ */

.wrap {
    max-width: 1200px;
    margin-inline: auto;
    padding-inline: 32px;
    width: 100%;
}
.wrap--narrow { max-width: 1080px; }

.section { padding-block: 64px; }
.section--first { padding-block-start: 80px; padding-block-end: 24px; }

.band {
    background: var(--band);
    border-block: 1px solid var(--border);
}

.grid-4, .grid-3, .grid-2 { display: grid; gap: 20px; }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid--tight { gap: 14px; }

@media (max-width: 1024px) {
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
    .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
    .wrap { padding-inline: 20px; }
    .section { padding-block: 44px; }
}

/* ---------------------------------------------------------------------------
   Typography helpers
   ------------------------------------------------------------------------ */

.mono { font-family: var(--font-mono); }

.eyebrow {
    font-family: var(--font-mono);
    font-size: 13px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--link);
    margin-block-end: 12px;
}
.eyebrow--on-dark { color: var(--mint); }

.section-heading {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 16px;
    margin-block-end: 28px;
    flex-wrap: wrap;
}
.section-heading h2 {
    font-weight: 700;
    font-size: clamp(26px, 3.2vw, 34px);
    margin: 0;
}
.section-heading__link { font-weight: 600; font-size: 15px; white-space: nowrap; }

.page-head { margin-block-end: 36px; }
.page-head h1 {
    font-weight: 800;
    font-size: clamp(32px, 4.4vw, 44px);
    letter-spacing: var(--tracking-tight);
    margin: 0 0 10px;
}
.page-head__lead {
    font-size: 16.5px;
    color: var(--muted);
    margin: 0;
    max-width: 620px;
    text-wrap: pretty;
}

/* ---------------------------------------------------------------------------
   Buttons and badges
   ------------------------------------------------------------------------ */

.btn-dark, .btn-cta, .btn-ghost {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-weight: 600;
    font-size: 15px;
    padding: 10px 18px;
    border-radius: var(--r-btn-sm);
    border: 0;
    cursor: pointer;
    transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
    text-align: center;
}
.btn-dark { background: var(--dark); color: #eafff0; }
.btn-dark:hover { background: var(--dark-2); color: #eafff0; }
.btn-cta { background: var(--cta); color: var(--dark); }
.btn-cta:hover { background: var(--cta-hover); color: var(--dark); }
.btn-ghost {
    background: transparent;
    color: var(--ink);
    border: 1px solid var(--border);
}
.btn-ghost:hover { border-color: var(--link); color: var(--ink); }
.btn--lg { font-size: 16px; padding: 14px 28px; border-radius: var(--r-btn); }
.btn--block { display: flex; width: 100%; }

.btn-danger {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 14.5px;
    padding: 10px 18px;
    border-radius: var(--r-btn-sm);
    border: 1px solid #d33c3c;
    background: transparent;
    color: #b32626;
    cursor: pointer;
}
.btn-danger:hover { background: #b32626; color: #fff; }

.tag-badge {
    display: inline-block;
    align-self: flex-start;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--link);
    background: var(--badge-bg);
    padding: 4px 8px;
    border-radius: var(--r-badge);
}
.tag-badge--on-dark { color: var(--mint); background: var(--dark-2); padding: 5px 10px; }

.pill-tabs { display: flex; gap: 10px; flex-wrap: wrap; }
.pill-tab {
    height: 38px;
    padding: 0 18px;
    display: inline-flex;
    align-items: center;
    border-radius: var(--r-pill);
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--ink);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: border-color 0.15s ease;
}
.pill-tab:hover { border-color: var(--link); color: var(--ink); }
.pill-tab.is-active { background: var(--dark); border-color: var(--dark); color: #eafff0; }

/* ---------------------------------------------------------------------------
   Header
   ------------------------------------------------------------------------ */

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(251, 250, 247, 0.92);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    border: 0;
    border-block-end: 1px solid var(--border);
    box-shadow: none;
}

.site-header__inner {
    height: 68px;
    display: flex;
    align-items: center;
    gap: 36px;
}

.logo-mark {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--dark);
    flex-shrink: 0;
}
.logo-mark:hover { color: var(--dark); }
.logo-mark__glyph {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: var(--dark);
    color: var(--mint);
    display: grid;
    place-items: center;
    font-family: var(--font-mono);
    font-weight: 600;
    font-size: 15px;
    line-height: 1;
}
.logo-mark__name {
    font-family: var(--font-head);
    font-weight: 700;
    font-size: 20px;
    letter-spacing: var(--tracking-head);
    white-space: nowrap;
}
.logo-mark--on-dark, .logo-mark--on-dark:hover { color: var(--ink-on-dark); }

.site-nav { display: flex; gap: 26px; font-size: 15px; font-weight: 500; }
.site-nav a { color: var(--ink); }
.site-nav a:hover, .site-nav a.is-active { color: var(--link); }

.site-header__actions {
    margin-inline-start: auto;
    display: flex;
    align-items: center;
    gap: 12px;
}
.site-header__signin {
    font-size: 15px;
    font-weight: 500;
    color: var(--ink);
    padding: 9px 14px;
}
.site-header__signin:hover { color: var(--link); }

/* Authenticated user menu (vanilla dropdown, JS toggles [hidden]) */
.user-menu { position: relative; }
.user-menu__trigger {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--dark);
    color: #eafff0;
    border: 0;
    border-radius: var(--r-btn-sm);
    font-weight: 600;
    font-size: 15px;
    padding: 10px 16px;
    cursor: pointer;
}
.user-menu__trigger:hover { background: var(--dark-2); }
.user-menu__trigger .chev { transition: transform 0.15s ease; }
.user-menu__trigger[aria-expanded="true"] .chev { transform: rotate(180deg); }
.user-menu__panel {
    position: absolute;
    inset-inline-end: 0;
    top: calc(100% + 8px);
    min-width: 220px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--r-card);
    box-shadow: 0 18px 40px rgba(13, 31, 21, 0.12);
    padding: 8px;
    margin: 0;
    list-style: none;
    z-index: 60;
}
.user-menu__panel li { margin: 0; }
.user-menu__panel a, .user-menu__panel button {
    display: flex;
    width: 100%;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border: 0;
    background: none;
    border-radius: 8px;
    color: var(--ink);
    font-size: 14.5px;
    font-weight: 500;
    text-align: start;
    cursor: pointer;
}
.user-menu__panel a:hover, .user-menu__panel button:hover {
    background: var(--row-hover);
    color: var(--link);
}

/* Mobile toggle + off-canvas */
.mobile-toggle {
    display: none;
    appearance: none;
    background: none;
    border: 0;
    padding: 8px;
    cursor: pointer;
    color: var(--ink);
    line-height: 0;
}

.mobile-nav {
    position: fixed;
    inset: 0;
    z-index: 100;
    pointer-events: none;
    visibility: hidden;
    transition: visibility 0s linear 0.25s;
}
.mobile-nav__overlay {
    position: absolute;
    inset: 0;
    background: rgba(13, 31, 21, 0.5);
    opacity: 0;
    transition: opacity 0.25s ease;
}
.mobile-nav__panel {
    position: absolute;
    top: 0;
    bottom: 0;
    inset-inline-end: 0;
    width: min(320px, 88vw);
    background: var(--bg);
    border-inline-start: 1px solid var(--border);
    padding: 20px;
    overflow-y: auto;
    transform: translateX(100%);
    transition: transform 0.25s ease;
    display: flex;
    flex-direction: column;
    gap: 24px;
}
.mobile-nav.is-open {
    pointer-events: auto;
    visibility: visible;
    transition-delay: 0s;
}
.mobile-nav.is-open .mobile-nav__overlay { opacity: 1; }
.mobile-nav.is-open .mobile-nav__panel { transform: none; }

.mobile-nav__head {
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.mobile-nav__close {
    appearance: none;
    background: none;
    border: 0;
    padding: 8px;
    cursor: pointer;
    color: var(--ink);
    line-height: 0;
}
.mobile-nav__links {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
}
.mobile-nav__links a {
    display: block;
    padding: 12px 4px;
    font-size: 16px;
    font-weight: 500;
    color: var(--ink);
    border-block-end: 1px solid var(--hairline);
}
.mobile-nav__links a:hover { color: var(--link); }
.mobile-nav__cta { display: flex; flex-direction: column; gap: 10px; }
.mobile-nav__footer { margin-block-start: auto; display: flex; flex-direction: column; gap: 16px; }

@media (max-width: 920px) {
    .site-nav, .site-header__actions .site-header__signin,
    .site-header__actions .btn-dark, .site-header__actions .user-menu { display: none; }
    .mobile-toggle { display: inline-flex; }
    .site-header__inner { gap: 16px; }
}

/* ---------------------------------------------------------------------------
   Dark hero sections (home, course detail)
   ------------------------------------------------------------------------ */

.hero-dark {
    background: var(--dark);
    color: var(--ink-on-dark);
    overflow: hidden;
    position: relative;
}
.hero-dark::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(900px 400px at 80% -10%, rgba(77, 222, 128, 0.18), transparent 60%);
    pointer-events: none;
}
.hero-dark > .wrap { position: relative; }
.hero-dark h1 { color: var(--ink-on-dark); }
.hero-dark a { color: var(--mint); }
.hero-dark a:hover { color: #b8f7c9; }

.hero-grid {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: 64px;
    align-items: center;
    padding-block: 88px 96px;
}
.hero-title {
    font-weight: 800;
    font-size: clamp(38px, 5.4vw, 64px);
    line-height: 1.05;
    letter-spacing: -0.03em;
    margin: 0 0 22px;
}
:lang(ar) .hero-title { letter-spacing: 0; line-height: 1.25; }
.hero-lead {
    font-size: 19px;
    line-height: 1.6;
    color: var(--muted-on-dark);
    margin: 0 0 34px;
    max-width: 500px;
    text-wrap: pretty;
}

.hero-search { display: flex; gap: 10px; max-width: 520px; position: relative; }
.hero-search__field { flex: 1; position: relative; }
.hero-search input[type="text"], .hero-search input[type="search"] {
    width: 100%;
    height: 52px;
    border-radius: var(--r-btn);
    border: 1px solid var(--border-dark-2);
    background: var(--input-dark);
    color: var(--ink-on-dark);
    padding-inline: 18px;
    font-size: 16px;
    font-family: var(--font-body);
    outline: none;
}
.hero-search input::placeholder { color: var(--faint-on-dark); }
.hero-search input:focus { border-color: var(--cta); }
.hero-search .btn-cta { height: 52px; padding-inline: 24px; border-radius: var(--r-btn); font-size: 16px; }

.hero-stats {
    display: flex;
    gap: 32px;
    margin-block-start: 40px;
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--faint-on-dark);
    flex-wrap: wrap;
}
.hero-stats strong {
    display: block;
    font-size: 22px;
    color: var(--ink-on-dark);
    font-family: var(--font-head);
    letter-spacing: -0.01em;
    font-weight: 800;
}

/* Terminal window mock */
.terminal {
    background: var(--dark-panel);
    border: 1px solid var(--border-dark);
    border-radius: var(--r-card);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.45);
    overflow: hidden;
    font-family: var(--font-mono);
    font-size: 13.5px;
    line-height: 1.9;
    direction: ltr;
    text-align: left;
}
.terminal__bar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-dark);
    color: #6f8a79;
    font-size: 12px;
}
.terminal__dot {
    width: 10px; height: 10px;
    border-radius: 50%;
    background: #3a5a46;
    flex-shrink: 0;
}
.terminal__bar span:last-child { margin-left: 8px; }
.terminal__body { padding: 20px 22px; color: var(--muted-on-dark); }
.terminal__body .t-prompt { color: var(--cta); }
.terminal__body .t-dim { color: #6f8a79; }
.terminal__body .t-green { color: var(--cta); }
.terminal__cursor {
    display: inline-block;
    width: 9px; height: 17px;
    background: var(--cta);
    vertical-align: -3px;
    margin-left: 4px;
    animation: t-blink 1.1s step-end infinite;
}
@keyframes t-blink { 0%, 49% { opacity: 1; } 50%, 100% { opacity: 0; } }

@media (max-width: 960px) {
    .hero-grid { grid-template-columns: 1fr; gap: 44px; padding-block: 56px 64px; }
}

/* ---------------------------------------------------------------------------
   Cards
   ------------------------------------------------------------------------ */

.course-card {
    display: flex;
    flex-direction: column;
    border: 1px solid var(--border);
    border-radius: var(--r-card);
    overflow: hidden;
    background: var(--surface);
    color: var(--ink);
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.course-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 14px 30px rgba(13, 31, 21, 0.10);
    color: var(--ink);
}
.course-card__thumb {
    position: relative;
    aspect-ratio: 16 / 9;
    background: linear-gradient(135deg, #0d1f15, #1d5a37);
    display: grid;
    place-items: center;
    overflow: hidden;
}
.course-card__thumb img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.course-card__glyph {
    font-family: var(--font-mono);
    font-weight: 600;
    font-size: 32px;
    color: rgba(255, 255, 255, 0.92);
}
.course-card__flag {
    position: absolute;
    top: 10px;
    inset-inline-start: 10px;
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 500;
    background: rgba(13, 31, 21, 0.75);
    color: var(--mint);
    padding: 4px 8px;
    border-radius: var(--r-badge);
    z-index: 1;
}
.course-card__body {
    padding: 16px 16px 14px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    flex: 1;
}
.course-card__title {
    font-weight: 600;
    font-size: 15.5px;
    line-height: 1.35;
    color: var(--ink);
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
    overflow: hidden;
}
.course-card__meta {
    margin-block-start: auto;
    display: flex;
    gap: 12px;
    font-size: 12.5px;
    color: var(--faint);
    flex-wrap: wrap;
}
.course-card__instructor {
    font-size: 13px;
    color: var(--muted);
    border-block-start: 1px solid var(--hairline);
    padding-block-start: 9px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.category-card {
    display: block;
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 20px 20px 18px;
    background: var(--surface);
    color: var(--ink);
    transition: border-color 0.15s ease, transform 0.15s ease;
}
.category-card:hover {
    border-color: var(--link);
    transform: translateY(-2px);
    color: var(--ink);
}
.category-card__index {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--link);
    margin-block-end: 10px;
}
.category-card__name { font-weight: 600; font-size: 16.5px; margin-block-end: 4px; }
.category-card__count { font-size: 13.5px; color: var(--faint); }

.article-card {
    display: flex;
    flex-direction: column;
    gap: 12px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--r-card);
    padding: 24px;
    color: var(--ink);
    transition: transform 0.15s ease;
}
a.article-card:hover { transform: translateY(-3px); color: var(--ink); }
.article-card__kind {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--link);
}
.article-card__title {
    font-family: var(--font-head);
    font-weight: 700;
    font-size: 20px;
    line-height: 1.25;
    letter-spacing: -0.01em;
    color: var(--ink);
    text-wrap: balance;
}
:lang(ar) .article-card__title { letter-spacing: 0; }
.article-card__excerpt {
    font-size: 14.5px;
    line-height: 1.55;
    color: var(--muted);
    flex: 1;
}
.article-card__byline {
    font-size: 13.5px;
    color: var(--faint);
    border-block-start: 1px solid var(--hairline);
    padding-block-start: 12px;
}

/* Featured article (2-column) */
.featured-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    border: 1px solid var(--border);
    border-radius: 20px;
    overflow: hidden;
    background: var(--surface);
    color: var(--ink);
    margin-block-end: 40px;
    transition: box-shadow 0.15s ease;
}
a.featured-card:hover { box-shadow: 0 18px 40px rgba(13, 31, 21, 0.10); color: var(--ink); }
.featured-card__visual {
    background: linear-gradient(135deg, #0d1f15, #1d5a37);
    display: grid;
    place-items: center;
    min-height: 280px;
    font-family: var(--font-mono);
    font-weight: 600;
    font-size: 56px;
    color: rgba(255, 255, 255, 0.9);
}
.featured-card__content {
    padding: 40px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    justify-content: center;
}
.featured-card__title {
    font-family: var(--font-head);
    font-weight: 800;
    font-size: clamp(22px, 2.8vw, 30px);
    line-height: 1.15;
    letter-spacing: var(--tracking-head);
    text-wrap: balance;
}
@media (max-width: 800px) {
    .featured-card { grid-template-columns: 1fr; }
    .featured-card__visual { min-height: 180px; }
    .featured-card__content { padding: 24px; }
}

/* Deterministic gradient thumbs for content without imagery */
.g-0 { background: linear-gradient(135deg, #0d1f15, #1d5a37); }
.g-1 { background: linear-gradient(135deg, #12303f, #2a6f6f); }
.g-2 { background: linear-gradient(135deg, #3b2a12, #8a5a1d); }
.g-3 { background: linear-gradient(135deg, #2a1230, #5a1d4e); }
.g-4 { background: linear-gradient(135deg, #101d2e, #2d4a7a); }
.g-5 { background: linear-gradient(135deg, #301a12, #7a3d2d); }

/* ---------------------------------------------------------------------------
   Breadcrumbs, pagination, misc navigation
   ------------------------------------------------------------------------ */

.crumbs {
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--faint);
    margin-block-end: 10px;
}
.crumbs ol {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}
.crumbs li { display: flex; gap: 6px; align-items: baseline; }
.crumbs li + li::before { content: "/"; color: var(--faint); }
.crumbs a { color: var(--faint); }
.crumbs a:hover { color: var(--link); }
.crumbs--on-dark, .crumbs--on-dark a { color: var(--faint-on-dark); }
.crumbs--on-dark a:hover { color: var(--mint); }
.crumbs--on-dark li + li::before { color: var(--faint-on-dark); }

.pager {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    margin-block-start: 36px;
    font-family: var(--font-mono);
    font-size: 14px;
    flex-wrap: wrap;
    list-style: none;
    padding: 0;
}
.pager li { margin: 0; }
.pager a, .pager span {
    min-width: 38px;
    height: 38px;
    padding-inline: 10px;
    border-radius: var(--r-btn-sm);
    border: 1px solid var(--border);
    color: var(--ink);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
.pager a:hover { border-color: var(--link); color: var(--ink); }
.pager .is-current {
    background: var(--dark);
    border-color: var(--dark);
    color: var(--mint);
}
.pager .is-disabled { opacity: 0.4; }

.results-count {
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--faint);
    margin-block-end: 18px;
}

/* ---------------------------------------------------------------------------
   Catalog (topic / category / all-categories) layout
   ------------------------------------------------------------------------ */

.catalog-layout {
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: 36px;
    align-items: start;
}

.filter-panel {
    display: flex;
    flex-direction: column;
    gap: 28px;
    position: sticky;
    top: 92px;
}
.filter-panel__group { display: flex; flex-direction: column; gap: 12px; }
.filter-panel__label {
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--faint);
}
.check {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14.5px;
    cursor: pointer;
}
.check input[type="checkbox"] {
    accent-color: var(--link);
    width: 16px;
    height: 16px;
    margin: 0;
    flex-shrink: 0;
}

.input {
    height: 44px;
    border: 1px solid var(--border);
    border-radius: var(--r-btn-sm);
    background: var(--surface);
    padding-inline: 14px;
    font-size: 14.5px;
    font-family: var(--font-body);
    color: var(--ink);
    outline: none;
    width: 100%;
}
.input:focus { border-color: var(--link); }
.input::placeholder { color: var(--faint); }

.select {
    height: 42px;
    border: 1px solid var(--border);
    border-radius: var(--r-btn-sm);
    background: var(--surface);
    padding-inline: 12px;
    font-family: var(--font-body);
    font-size: 14.5px;
    color: var(--ink);
}

.sort-row {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: var(--muted);
    white-space: nowrap;
}

.input-row { display: flex; gap: 8px; }
.icon-btn {
    display: inline-grid;
    place-items: center;
    width: 44px;
    height: 44px;
    border: 1px solid var(--border);
    border-radius: var(--r-btn-sm);
    background: var(--surface);
    color: var(--muted);
    cursor: pointer;
    flex-shrink: 0;
}
.icon-btn:hover { border-color: var(--link); color: var(--link); }

.link-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.link-list a {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 10px;
    font-size: 14.5px;
    color: var(--ink);
    padding: 8px 10px;
    border-radius: 8px;
}
.link-list a:hover { background: var(--row-hover); color: var(--link); }
.link-list a span {
    color: var(--faint);
    font-family: var(--font-mono);
    font-size: 12.5px;
}

@media (max-width: 900px) {
    .catalog-layout { grid-template-columns: 1fr; }
    .filter-panel { position: static; }
}

/* ---------------------------------------------------------------------------
   Course detail
   ------------------------------------------------------------------------ */

.course-hero-grid {
    display: grid;
    grid-template-columns: 1fr 380px;
    gap: 56px;
    align-items: start;
    padding-block: 52px 56px;
}
.course-hero-grid h1 {
    font-weight: 800;
    font-size: clamp(30px, 4.2vw, 46px);
    line-height: 1.1;
    letter-spacing: var(--tracking-tight);
    margin: 0 0 18px;
}
.course-hero__desc {
    font-size: 17px;
    line-height: 1.6;
    color: var(--muted-on-dark);
    margin: 0 0 26px;
    max-width: 560px;
    text-wrap: pretty;
}
.stat-row {
    display: flex;
    gap: 26px;
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--faint-on-dark);
    flex-wrap: wrap;
}

.course-panel {
    background: var(--surface);
    border-radius: 18px;
    overflow: hidden;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.4);
    color: var(--ink);
}
.course-panel__preview {
    display: grid;
    place-items: center;
    height: 200px;
    position: relative;
    color: #fff;
    overflow: hidden;
}
.course-panel__preview img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.play-circle {
    position: absolute;
    width: 62px;
    height: 62px;
    border-radius: 50%;
    background: var(--cta);
    display: grid;
    place-items: center;
    color: var(--dark);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
    z-index: 1;
    transition: background 0.15s ease;
}
.course-panel__preview:hover .play-circle { background: var(--cta-hover); }
.course-panel__body {
    padding: 22px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}
.spec-table {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    font-size: 13.5px;
    margin: 0;
}
.spec-table dt { color: var(--faint); margin: 0; }
.spec-table dd { text-align: end; font-weight: 500; margin: 0; }
.spec-table .spec-free { font-weight: 600; color: var(--link); }

.content-card {
    border: 1px solid var(--border);
    border-radius: var(--r-card);
    background: var(--surface);
    overflow: hidden;
}
.curriculum__row {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 15px 20px;
    border-block-end: 1px solid var(--hairline);
    color: var(--ink);
}
a.curriculum__row:hover { background: var(--row-hover); color: var(--ink); }
.curriculum__num {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--link);
    width: 24px;
    flex-shrink: 0;
}
.curriculum__title { font-size: 15px; flex: 1; min-width: 0; }
.curriculum__time {
    font-family: var(--font-mono);
    font-size: 12.5px;
    color: var(--faint);
    flex-shrink: 0;
}
.curriculum__row .icon-check { color: var(--link); flex-shrink: 0; }
.curriculum__more { padding: 14px 20px; text-align: center; }
.curriculum__more button {
    background: none;
    border: 0;
    color: var(--link);
    font-weight: 600;
    font-size: 14.5px;
    cursor: pointer;
    font-family: var(--font-body);
}
.curriculum__more button:hover { color: var(--link-hover); }
.curriculum.is-collapsed .curriculum__row:nth-of-type(n + 11) { display: none; }

.aside-card {
    border: 1px solid var(--border);
    border-radius: var(--r-card);
    background: var(--surface);
    padding: 22px;
}
.aside-card__label {
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--faint);
    margin-block-end: 14px;
}
.learn-list { display: flex; flex-direction: column; gap: 10px; font-size: 14.5px; line-height: 1.5; }
.learn-list > div { display: flex; gap: 10px; }
.learn-list .icon-check { color: var(--link); flex-shrink: 0; }

.instructor-card { display: flex; gap: 14px; align-items: center; }
.instructor-card__avatar {
    width: 46px;
    height: 46px;
    border-radius: 50%;
    background: linear-gradient(135deg, #0d1f15, #1d5a37);
    color: var(--mint);
    display: grid;
    place-items: center;
    font-family: var(--font-mono);
    font-weight: 600;
    font-size: 15px;
    flex-shrink: 0;
    overflow: hidden;
}
.instructor-card__avatar img { width: 100%; height: 100%; object-fit: cover; }
.instructor-card__name { font-weight: 600; font-size: 15.5px; }
.instructor-card__sub { font-size: 13.5px; color: var(--faint); }

.course-body-grid {
    display: grid;
    grid-template-columns: 1fr 380px;
    gap: 56px;
    align-items: start;
    padding-block: 56px 80px;
}
.course-body-grid > aside { display: flex; flex-direction: column; gap: 24px; }

.share-row {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-block-start: 24px;
    flex-wrap: wrap;
}
.share-row__label { font-family: var(--font-mono); font-size: 12px; color: var(--faint); text-transform: uppercase; letter-spacing: 0.1em; }
.share-row a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border: 1px solid var(--border);
    border-radius: var(--r-btn-sm);
    color: var(--muted);
}
.share-row a:hover { border-color: var(--link); color: var(--link); }
.hero-dark .share-row a { border-color: var(--border-dark-2); color: var(--faint-on-dark); }
.hero-dark .share-row a:hover { border-color: var(--cta); color: var(--mint); }

@media (max-width: 960px) {
    .course-hero-grid, .course-body-grid { grid-template-columns: 1fr; gap: 36px; }
    .course-hero-grid { padding-block: 36px 40px; }
}

/* ---------------------------------------------------------------------------
   FAQ / accordions (native details)
   ------------------------------------------------------------------------ */

.faq { display: flex; flex-direction: column; gap: 12px; }
.acc {
    border: 1px solid var(--border);
    border-radius: var(--r-card);
    background: var(--surface);
}
.acc summary {
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 16px 20px;
    font-weight: 600;
    font-size: 15.5px;
    cursor: pointer;
}
.acc summary::-webkit-details-marker { display: none; }
.acc summary .chev { flex-shrink: 0; transition: transform 0.15s ease; color: var(--faint); }
.acc[open] summary .chev { transform: rotate(180deg); }
.acc__body { padding: 0 20px 18px; color: var(--muted); font-size: 14.5px; line-height: 1.6; }
.acc__body p:last-child { margin-bottom: 0; }

/* ---------------------------------------------------------------------------
   Related topics (SEO internal links, ported styling)
   ------------------------------------------------------------------------ */

.related-topics {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    list-style: none;
    padding: 0;
    margin: 0;
}
.related-topics li { margin: 0; }
.related-topics a {
    display: inline-flex;
    align-items: baseline;
    gap: 8px;
    padding: 9px 16px;
    border: 1px solid var(--border);
    border-radius: var(--r-btn-sm);
    background: var(--surface);
    color: var(--ink);
    font-weight: 500;
    line-height: 1.4;
    transition: border-color 0.15s ease, color 0.15s ease;
}
.related-topics a:hover, .related-topics a:focus-visible {
    border-color: var(--link);
    color: var(--link);
}
.related-topics__count { font-size: 13px; font-weight: 400; opacity: 0.75; }

/* ---------------------------------------------------------------------------
   Search suggestions (vanilla autocomplete)
   ------------------------------------------------------------------------ */

.suggest {
    position: absolute;
    top: calc(100% + 6px);
    inset-inline: 0;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--r-btn);
    box-shadow: 0 18px 40px rgba(13, 31, 21, 0.14);
    list-style: none;
    margin: 0;
    padding: 6px;
    max-height: 260px;
    overflow-y: auto;
    z-index: 40;
    text-align: start;
}
.suggest[hidden] { display: none; }
.suggest li { margin: 0; }
.suggest a {
    display: block;
    padding: 10px 14px;
    border-radius: 8px;
    color: var(--ink);
    font-size: 14.5px;
}
.suggest a:hover, .suggest .is-active a {
    background: var(--badge-bg);
    color: var(--link);
}

/* ---------------------------------------------------------------------------
   CTA section
   ------------------------------------------------------------------------ */

.cta-section {
    text-align: center;
    padding-block: 80px;
}
.cta-section h2 {
    font-weight: 800;
    font-size: clamp(30px, 4.2vw, 44px);
    letter-spacing: var(--tracking-tight);
    margin: 0 0 14px;
}
.cta-section p { font-size: 17px; color: var(--muted); margin: 0 0 30px; }

/* ---------------------------------------------------------------------------
   Newsletter panel (footer + articles)
   ------------------------------------------------------------------------ */

.newsletter-panel {
    background: var(--dark);
    border: 1px solid var(--border-dark);
    border-radius: 20px;
    padding: 44px;
    display: flex;
    align-items: center;
    gap: 40px;
    flex-wrap: wrap;
}
.newsletter-panel__text { flex: 1; min-width: 280px; }
.newsletter-panel__title {
    font-family: var(--font-head);
    font-weight: 700;
    font-size: 26px;
    color: var(--ink-on-dark);
    letter-spacing: var(--tracking-head);
    margin: 0 0 8px;
}
.newsletter-panel__sub { font-size: 15px; color: var(--muted-on-dark); line-height: 1.5; margin: 0; }

.newsletter-form { flex: 1; min-width: 300px; }
.newsletter-form__row { display: flex; gap: 10px; }
.newsletter-form input[type="email"] {
    flex: 1;
    min-width: 0;
    height: 48px;
    border-radius: 11px;
    border: 1px solid var(--border-dark-2);
    background: var(--input-dark);
    color: var(--ink-on-dark);
    padding-inline: 16px;
    font-size: 15px;
    font-family: var(--font-body);
    outline: none;
}
.newsletter-form input::placeholder { color: var(--faint-on-dark); }
.newsletter-form input:focus { border-color: var(--cta); }
.newsletter-form .btn-cta { height: 48px; padding-inline: 22px; border-radius: 11px; flex-shrink: 0; }
.newsletter-form__msg {
    display: none;
    margin-block-start: 10px;
    padding: 8px 12px;
    border-radius: 8px;
    font-size: 14px;
}
.newsletter-form__msg.is-success {
    display: block;
    background: rgba(77, 222, 128, 0.15);
    color: var(--mint);
    border: 1px solid var(--border-dark-2);
}
.newsletter-form__msg.is-error {
    display: block;
    background: rgba(220, 60, 60, 0.15);
    color: #ffb4b4;
    border: 1px solid rgba(220, 60, 60, 0.4);
}
@media (max-width: 600px) {
    .newsletter-panel { padding: 28px 20px; }
    .newsletter-form__row { flex-direction: column; }
}

/* ---------------------------------------------------------------------------
   Footer
   ------------------------------------------------------------------------ */

.site-footer {
    background: var(--dark);
    color: var(--faint-on-dark);
    margin-block-start: 80px;
}
.site-footer a { color: var(--faint-on-dark); }
.site-footer a:hover { color: var(--mint); }
.site-footer__newsletter { padding-block: 40px 8px; }
.site-footer__cols {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr;
    gap: 40px;
    padding-block: 40px;
}
.site-footer__about p { font-size: 14.5px; line-height: 1.65; margin: 14px 0 0; max-width: 420px; }
.site-footer__heading {
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: #6f8a79;
    margin: 0 0 14px;
}
.site-footer__links { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.site-footer__links a { font-size: 14.5px; }
.site-footer__lang { margin-block-start: 18px; }
.site-footer__bottom {
    border-block-start: 1px solid var(--border-dark);
    padding-block: 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
    font-size: 14px;
}
.site-footer__credit {
    font-family: var(--font-mono);
    font-size: 12px;
}
.site-footer__credit a { color: var(--faint-on-dark); }
.site-footer .social {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: 14px;
}
.site-footer .social li { display: inline-flex; margin: 0; }
.site-footer .social a { color: var(--faint-on-dark); display: inline-flex; }
.site-footer .social a:hover { color: var(--mint); }
@media (max-width: 800px) {
    .site-footer__cols { grid-template-columns: 1fr; gap: 28px; }
}

/* Header/mobile/aside social lists share the markup partial */
.aside-card .social {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: 12px;
}
.aside-card .social li { display: inline-flex; margin: 0; }
.aside-card .social a { color: var(--muted); display: inline-flex; }
.aside-card .social a:hover { color: var(--link); }

.site-header .social, .mobile-nav .social {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: 12px;
}
.site-header .social li, .mobile-nav .social li { display: inline-flex; margin: 0; }
.site-header .social a, .mobile-nav .social a { color: var(--muted); display: inline-flex; }
.site-header .social a:hover, .mobile-nav .social a:hover { color: var(--link); }

/* ---------------------------------------------------------------------------
   Language switcher (markup unchanged; restyled for the new surfaces).
   Dark variant is the default (footer); .mobile-nav hosts the light variant.
   ------------------------------------------------------------------------ */

.language-switcher { display: inline-block; }
.language-switcher .language-dropdown {
    position: relative;
    display: inline-block;
    min-width: 150px;
    border-radius: var(--r-btn-sm);
}
.language-switcher .selected-language {
    display: flex !important;
    align-items: center;
    gap: 8px;
    width: 100%;
    margin: 0;
    padding: 8px 12px;
    background: var(--input-dark);
    border: 1px solid var(--border-dark-2);
    border-radius: var(--r-btn-sm);
    color: var(--ink-on-dark) !important;
    font: inherit;
    font-size: 14px;
    line-height: 1.2;
    text-align: start;
    cursor: pointer;
}
.language-switcher .selected-language img,
.language-switcher .language-options li img {
    width: 20px;
    height: 15px;
    flex: 0 0 auto;
    object-fit: cover;
    border-radius: 2px;
}
.language-switcher .selected-language span { white-space: nowrap; }
.language-switcher .selected-language .chev {
    margin-inline-start: auto;
    transition: transform 0.2s ease;
    flex-shrink: 0;
}
.language-switcher .language-dropdown.is-open .selected-language .chev { transform: rotate(180deg); }
.language-switcher .language-options {
    position: absolute;
    top: 100%;
    inset-inline-start: 0;
    width: 100%;
    margin: 0;
    padding: 0;
    list-style: none;
    background-color: var(--dark-2);
    border-radius: 0 0 var(--r-btn-sm) var(--r-btn-sm);
    overflow: hidden;
    max-height: 0;
    transition: max-height 0.3s ease;
    z-index: 1000;
}
.language-switcher .language-options li { margin: 0; }
.language-switcher .language-options li a {
    display: flex !important;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    color: var(--ink-on-dark) !important;
    text-decoration: none;
    text-align: start;
    white-space: nowrap;
    font-size: 14px;
    transition: background-color 0.2s;
}
.language-switcher .language-options li a::after { display: none !important; }
.language-switcher .language-options li a:hover,
.language-switcher .language-options li a:focus-visible {
    background-color: var(--border-dark);
    color: var(--ink-on-dark) !important;
}
.language-switcher .language-options li a[aria-current="true"] {
    background-color: var(--border-dark);
    color: var(--mint) !important;
    font-weight: 600;
}
.language-switcher .language-dropdown.is-open .language-options,
.language-switcher .language-dropdown:focus-within .language-options {
    max-height: 240px;
}
@media (hover: hover) and (pointer: fine) {
    .language-switcher .language-dropdown:hover .language-options { max-height: 240px; }
}

/* Light-context variant (inside the mobile off-canvas panel) */
.mobile-nav .language-switcher .selected-language {
    background: var(--surface);
    border-color: var(--border);
    color: var(--ink) !important;
}
.mobile-nav .language-switcher .language-options {
    background: var(--surface);
    border: 1px solid var(--border);
    border-block-start: 0;
}
.mobile-nav .language-switcher .language-options li a { color: var(--ink) !important; }
.mobile-nav .language-switcher .language-options li a:hover,
.mobile-nav .language-switcher .language-options li a:focus-visible {
    background: var(--row-hover);
    color: var(--link) !important;
}
.mobile-nav .language-switcher .language-options li a[aria-current="true"] {
    background: var(--badge-bg);
    color: var(--link) !important;
}

/* ---------------------------------------------------------------------------
   Forms, auth, account
   ------------------------------------------------------------------------ */

.auth-card {
    max-width: 460px;
    margin-inline: auto;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--r-card);
    padding: 32px;
    margin-block: 64px;
}
.auth-card h1 {
    font-weight: 800;
    font-size: 28px;
    margin: 0 0 6px;
}
.auth-card__sub { font-size: 14.5px; color: var(--muted); margin: 0 0 24px; }
.auth-card__alt {
    font-size: 14px;
    color: var(--muted);
    text-align: center;
    margin: 18px 0 0;
}
.auth-card__divider {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--faint);
    font-family: var(--font-mono);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-block: 18px;
}
.auth-card__divider::before, .auth-card__divider::after {
    content: "";
    flex: 1;
    height: 1px;
    background: var(--hairline);
}

.field { display: flex; flex-direction: column; gap: 6px; margin-block-end: 16px; }
.field label { font-size: 14px; font-weight: 500; }
.field .input { height: 48px; }
.field textarea.input { height: auto; min-height: 120px; padding-block: 12px; resize: vertical; }
.field__error { font-size: 13px; color: #b32626; }
.field__hint { font-size: 13px; color: var(--faint); }

.flash {
    padding: 12px 16px;
    border-radius: var(--r-btn-sm);
    font-size: 14.5px;
    margin-block-end: 20px;
}
.flash--success { background: var(--badge-bg); color: var(--link-hover); border: 1px solid #bfe8cf; }
.flash--error { background: #fbeaea; color: #b32626; border: 1px solid #f0c4c4; }

.progress-track {
    height: 5px;
    border-radius: 3px;
    background: var(--hairline);
    overflow: hidden;
}
.progress-fill {
    height: 100%;
    border-radius: 3px;
    background: var(--link);
}
.progress-fill.is-complete { background: var(--cta); }

.empty-state {
    text-align: center;
    padding-block: 64px;
    border: 1px dashed var(--border);
    border-radius: var(--r-card);
    background: var(--surface);
}
.empty-state h2 { font-size: 22px; margin-block-end: 8px; }
.empty-state p { color: var(--muted); margin-block-end: 20px; }

.account-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 36px;
    align-items: start;
    padding-block: 48px 80px;
}
@media (max-width: 900px) {
    .account-layout { grid-template-columns: 1fr; }
}

dialog.modal {
    border: 0;
    border-radius: var(--r-card);
    padding: 28px;
    max-width: 420px;
    width: calc(100vw - 40px);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.3);
    color: var(--ink);
    background: var(--surface);
}
dialog.modal::backdrop { background: rgba(13, 31, 21, 0.55); }
.modal__title { font-weight: 700; font-size: 20px; margin: 0 0 8px; }
.modal__actions { display: flex; gap: 10px; justify-content: flex-end; margin-block-start: 20px; }

/* Google sign-in button (markup unchanged; ported from custom.css) */
.gsi-material-button {
    user-select: none;
    appearance: none;
    background-color: #fff;
    border: 1px solid var(--border);
    border-radius: var(--r-btn-sm);
    box-sizing: border-box;
    color: #1f1f1f;
    cursor: pointer;
    font-family: var(--font-body);
    font-size: 14px;
    height: 44px;
    letter-spacing: 0.25px;
    outline: none;
    overflow: hidden;
    padding: 0 12px;
    position: relative;
    text-align: center;
    transition: background-color 0.2s, border-color 0.2s, box-shadow 0.2s;
    vertical-align: middle;
    white-space: nowrap;
    width: 100%;
}
.gsi-material-button .gsi-material-button-icon {
    height: 20px;
    margin-inline-end: 12px;
    min-width: 20px;
    width: 20px;
}
.gsi-material-button .gsi-material-button-content-wrapper {
    align-items: center;
    display: flex;
    flex-direction: row;
    flex-wrap: nowrap;
    height: 100%;
    justify-content: center;
    position: relative;
    width: 100%;
}
.gsi-material-button .gsi-material-button-contents {
    font-weight: 500;
    overflow: hidden;
    text-overflow: ellipsis;
    vertical-align: top;
}
.gsi-material-button .gsi-material-button-state {
    transition: opacity 0.2s;
    inset: 0;
    opacity: 0;
    position: absolute;
}
.gsi-material-button:disabled { cursor: default; background-color: #ffffff61; }
.gsi-material-button:not(:disabled):active .gsi-material-button-state,
.gsi-material-button:not(:disabled):focus .gsi-material-button-state {
    background-color: #303030;
    opacity: 12%;
}
.gsi-material-button:not(:disabled):hover {
    box-shadow: 0 1px 2px 0 rgba(60, 64, 67, 0.3), 0 1px 3px 1px rgba(60, 64, 67, 0.15);
}
.gsi-material-button:not(:disabled):hover .gsi-material-button-state {
    background-color: #303030;
    opacity: 8%;
}

/* ---------------------------------------------------------------------------
   Prose (legals, about)
   ------------------------------------------------------------------------ */

.prose {
    max-width: 760px;
    padding-block: 48px 80px;
}
.prose h1 { font-size: clamp(30px, 4vw, 40px); font-weight: 800; }
.prose h2 { font-size: 24px; margin-block-start: 1.6em; }
.prose h3 { font-size: 19px; margin-block-start: 1.4em; }
.prose p, .prose li { color: var(--muted); font-size: 15.5px; line-height: 1.7; }
.prose ul { padding-inline-start: 22px; }

/* Topic intro copy (SEO landing content; class name kept for continuity) */
.topic__intro { margin-block-end: 30px; }
.topic__intro p {
    color: var(--muted);
    font-size: 16px;
    max-width: 760px;
    margin-bottom: 0;
}
.topic__intro p + p { margin-top: 12px; }

/* ---------------------------------------------------------------------------
   Icons (inline SVG sizing)
   ------------------------------------------------------------------------ */

.icon { width: 1em; height: 1em; display: inline-block; vertical-align: -0.125em; fill: none; stroke: currentColor; }

/* Directional glyphs that must mirror in RTL */
[dir="rtl"] .dir-flip { transform: scaleX(-1); }

/* Mono runs hold latin digits and symbols; isolate them so Arabic context
   does not reorder them. */
.crumbs, .results-count, .curriculum__time, .stat-row span, .hero-stats span {
    unicode-bidi: isolate;
}