/* ==========================================================================
   Arabic-first design system. One file, no framework, no build step needed.
   - RTL by default (html[dir=rtl]); LTR works with the same rules because every
     direction-sensitive property is LOGICAL (inline-start/end, block-start/end).
   - Order of precedence is fixed by cascade layers, so overrides never need !important.
   - Change the look by editing tokens only; components never hard-code a color or size.
   ========================================================================== */
@layer reset, tokens, base, layout, components, utilities;

/* Fonts: self-hosted (SIL Open Font License, see fonts/licenses/). The @font-face rules for the fonts the academy
   chose are in /brand.css, generated from Admin → Branding together with the colors below. */

/* --------------------------------------------------------------- reset */
@layer reset {
  *, *::before, *::after { box-sizing: border-box; }
  * { margin: 0; }
  html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
  img, picture, svg, video { display: block; max-inline-size: 100%; block-size: auto; }
  input, button, textarea, select { font: inherit; color: inherit; }
  button { cursor: pointer; }
  :where(ul, ol)[role="list"] { list-style: none; padding: 0; }
  @media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
  }
}

/* --------------------------------------------------------------- tokens */
@layer tokens {
  /* Each color is defined ONCE for both themes with light-dark(light, dark).
     The theme follows the OS; data-theme="light|dark" on <html> forces one (see theme toggle in app.js). */
  :root { color-scheme: light dark; }
  :root[data-theme="light"] { color-scheme: light; }
  :root[data-theme="dark"]  { color-scheme: dark; }
  :root {
    /* color: the academy's identity (defaults = the approved «الريحان»: sage for actions and links, basil-flower
       purple for the one thing that marks "you are here"). Admin → Branding overrides these through /brand.css, which
       derives every value (and the whole dark theme) from four colors. Status colors only for status. */
    --bg:          light-dark(#F6F3FA, #151219);
    --surface:     light-dark(#FDFCFE, #1F1B25);
    --surface-2:   light-dark(#ECE9F0, #292331);
    --text:        light-dark(#262130, #EDEAF0);
    --muted:       light-dark(#716E79, #A7A1AF);
    --line:        light-dark(#DBD8E0, #393144);
    --accent:      light-dark(#4D7758, #88B292);
    --accent-ink:  light-dark(#FFFFFF, #121C15);
    --accent-soft: light-dark(#E8ECEA, #303336);
    --gold:        light-dark(#6D4C8F, #B59ECC);
    --gold-ink:    light-dark(#FFFFFF, #170F1F);
    --side-bg:     light-dark(#223527, #0F0D12);
    --mark:        light-dark(#4F7A5A, #6F9278);
    --mark-2:      light-dark(#6D4C8F, #B59ECC);
    --mark-soft:   #DFD8E6;
    --mark-night:  #6F9278;
    --side-text:   #dbe4ee;
    --side-muted:  #93a6bb;
    --side-strong: #ffffff;
    --side-hover:  rgb(255 255 255 / .07);
    --side-active: rgb(255 255 255 / .1);
    --side-line:   rgb(255 255 255 / .12);
    --on-success:  #ffffff;
    --scrim:       rgb(10 18 28 / .45);
    --warn:        #b7791f;
    --danger:      light-dark(#a3352a, #f19185);
    --success:     light-dark(#2e6b4f, #7fcf9f);
    --focus: #2f7de1;
    --player-bg: #000;
    --watermark: rgb(255 255 255 / .35);
    --watermark-shadow: rgb(0 0 0 / .6);

    /* type: one family that covers Arabic and Latin, system fallbacks that do too */
    --font: "Readex Pro", "Segoe UI", Tahoma, "Noto Sans Arabic", system-ui, sans-serif;
    --font-book: "Readex Pro", "Segoe UI", Tahoma, system-ui, sans-serif;   /* headings */
    --heading-weight: 600;
    --font-mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
    --leading: 1.8;            /* Arabic needs more line height than Latin */
    --step--1: clamp(.875rem, .85rem + .1vw, .94rem);
    --step-0:  clamp(1.0625rem, 1rem + .25vw, 1.125rem);
    --step-1:  clamp(1.25rem, 1.15rem + .5vw, 1.45rem);
    --step-2:  clamp(1.5rem, 1.3rem + 1vw, 2rem);
    --step-3:  clamp(1.9rem, 1.5rem + 2vw, 2.9rem);

    /* space: one scale for everything */
    --space-1: .25rem; --space-2: .5rem; --space-3: .75rem; --space-4: 1rem;
    --space-5: 1.5rem; --space-6: 2rem;  --space-7: 3rem;   --space-8: 5rem;

    --radius: .75rem; --radius-sm: .375rem;
    --shadow: 0 6px 24px rgb(15 26 39 / .14);
    --container: 72rem; --measure: 68ch;
    --ease: cubic-bezier(.2, .7, .2, 1); --fast: 150ms; --slow: 300ms;
  }
  /* English (and other LTR languages) get Latin-tuned rhythm; Arabic keeps the roomier defaults */
  :root:lang(en), :root:lang(fr), :root:lang(es), :root:lang(de) { --leading: 1.65; }
}

/* --------------------------------------------------------------- base */
@layer base {
  html { scroll-behavior: smooth; }
  body {
    background: var(--bg); color: var(--text);
    font-family: var(--font); font-size: var(--step-0); line-height: var(--leading);
    text-rendering: optimizeLegibility; -webkit-font-smoothing: antialiased;
  }
  /* titles in naskh, interface in sans: the book and the tool */
  h1, h2, h3 { font-family: var(--font-book); line-height: 1.45; font-weight: var(--heading-weight); text-wrap: balance; }
  h4 { line-height: 1.4; font-weight: 600; }
  h1 { font-size: var(--step-3); } h2 { font-size: var(--step-2); } h3 { font-size: var(--step-1); }
  p, li { max-inline-size: var(--measure); text-wrap: pretty; }
  a { color: var(--accent); text-underline-offset: .25em; text-decoration-thickness: 1px; }
  a:hover { text-decoration-thickness: 2px; }
  :focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; border-radius: var(--radius-sm); }
  ::selection { background: var(--accent-soft); }
  /* Never letter-space or uppercase Arabic: it breaks letter joining. Latin-only labels opt in with .caps */
  :lang(en) .caps { text-transform: uppercase; letter-spacing: .06em; font-size: var(--step--1); }
  /* Embedded opposite-direction text (names, code, URLs) keeps its own direction */
  bdi, .ltr { unicode-bidi: isolate; }
  .ltr { direction: ltr; }
  code, kbd, pre { font-family: var(--font-mono); direction: ltr; unicode-bidi: isolate; }
  /* Directional icons flip in RTL; neutral icons (search, close) don't use this class */
  [dir="rtl"] .icon-dir { transform: scaleX(-1); }
}

/* --------------------------------------------------------------- layout primitives */
@layer layout {
  .container { inline-size: min(100% - 2 * var(--space-4), var(--container)); margin-inline: auto; }
  .stack { display: flex; flex-direction: column; gap: var(--stack, var(--space-4)); }
  [data-gap="sm"] { --stack: var(--space-2); --cluster: var(--space-2); --grid-gap: var(--space-3); }
  [data-gap="lg"] { --stack: var(--space-5); --cluster: var(--space-4); --grid-gap: var(--space-6); }
  .cluster { display: flex; flex-wrap: wrap; align-items: center; gap: var(--cluster, var(--space-3)); }
  .grid { display: grid; gap: var(--grid-gap, var(--space-5));
          grid-template-columns: repeat(auto-fill, minmax(min(100%, var(--grid-min, 18rem)), 1fr)); }
  .section { padding-block: var(--space-8); }
  .section + .section { padding-block-start: 0; }
  .split { display: grid; gap: var(--space-6); align-items: center; }
  @media (min-width: 48rem) { .split { grid-template-columns: 1.1fr .9fr; } }
}

/* --------------------------------------------------------------- components */
@layer components {
  .skip-link { position: absolute; inset-inline-start: var(--space-4); inset-block-start: -10rem;
               background: var(--surface); padding: var(--space-2) var(--space-4); border-radius: var(--radius); z-index: 100; }
  .skip-link:focus { inset-block-start: var(--space-4); }

  /* site header: brand | main links ........ language, theme, bell, account menu (phones: one toggle) */
  .site-header { position: sticky; inset-block-start: 0; z-index: 50; background: var(--surface); border-block-end: 1px solid var(--line); }
  .site-header > .container { display: flex; align-items: center; gap: var(--space-5); min-block-size: 4.25rem; }
  .brand { display: inline-flex; align-items: center; gap: var(--space-2); color: var(--text); text-decoration: none;
           font-family: var(--font-book); font-weight: var(--heading-weight); font-size: var(--step-1); white-space: nowrap; }
  .brand-mark { flex: none; inline-size: auto; }
  .brand-logo { block-size: 2.25rem; inline-size: auto; max-inline-size: 12rem; object-fit: contain; }
  .brand-mark .m1 { fill: var(--mark); } .brand-mark .m2 { fill: var(--mark-2); } .brand-mark .m3 { fill: var(--mark-soft); } .brand-mark .w { fill: #fff; }
  .brand-mark .m1-line { fill: none; stroke: var(--mark); } .brand-mark .m2-line { fill: none; stroke: var(--mark-2); } .brand-mark .w-line { fill: none; stroke: #fff; }
  .sidebar .brand-mark .m1 { fill: var(--mark-night); } .sidebar .brand-mark .m1-line { stroke: var(--mark-night); }
  .nav { flex: 1; display: flex; align-items: center; justify-content: space-between; gap: var(--space-4); }
  .nav-main, .nav-end { display: flex; align-items: center; gap: var(--space-1); }
  .nav-main a, .nav-login { color: var(--muted); text-decoration: none; padding: var(--space-2) var(--space-3); min-block-size: 2.75rem;
                            display: inline-flex; align-items: center; border-block-end: 2px solid transparent; }
  .nav-main a:hover, .nav-login:hover { color: var(--text); }
  .nav-main a[aria-current="page"] { color: var(--text); border-block-end-color: var(--gold); }
  .nav-end { gap: var(--space-3); }
  .nav-toggle { display: none; align-items: center; gap: var(--space-2); min-block-size: 2.75rem; padding-inline: var(--space-3);
                background: none; color: var(--text); border: 1px solid var(--line); border-radius: var(--radius); }
  @media (max-width: 52rem) {
    .site-header > .container { justify-content: space-between; }
    .nav-toggle { display: inline-flex; }
    .nav { position: absolute; inset-inline: 0; inset-block-start: 100%; flex-direction: column; align-items: stretch; gap: var(--space-3);
           padding: var(--space-3) var(--space-4) var(--space-5); background: var(--surface); border-block-end: 1px solid var(--line);
           visibility: hidden; opacity: 0; transition: opacity var(--fast), visibility var(--fast); }
    .nav[data-open] { visibility: visible; opacity: 1; }
    .nav-main { flex-direction: column; align-items: stretch; }
    .nav-main a { border-block-end: 0; border-inline-start: 2px solid transparent; }
    .nav-main a[aria-current="page"] { border-inline-start-color: var(--gold); }
    .nav-end { flex-wrap: wrap; justify-content: space-between; border-block-start: 1px solid var(--line); padding-block-start: var(--space-3); }
  }

  /* language + theme */
  .prefs { display: flex; align-items: center; gap: var(--space-1); }
  .pref { display: inline-grid; place-items: center; min-inline-size: 2.75rem; min-block-size: 2.75rem; padding-inline: var(--space-2);
          color: var(--muted); background: none; border: 0; border-radius: var(--radius); text-decoration: none; font-size: var(--step--1); }
  .pref:hover { color: var(--text); background: var(--surface-2); }

  /* account menu (a <details>): avatar + name, opens a panel */
  .menu { position: relative; }
  .menu > summary { list-style: none; display: inline-flex; align-items: center; gap: var(--space-2); min-block-size: 2.75rem;
                    padding-inline: var(--space-1) var(--space-2); border-radius: 999px; cursor: pointer; color: var(--text); }
  .menu > summary::-webkit-details-marker { display: none; }
  .menu > summary:hover { background: var(--surface-2); }
  .menu[open] > summary svg { rotate: 180deg; }
  .avatar { display: inline-grid; place-items: center; inline-size: 2.1rem; block-size: 2.1rem; border-radius: 50%;
            background: var(--accent); color: var(--accent-ink); font-weight: 700; }
  .menu-name { max-inline-size: 10rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .menu-panel { position: absolute; inset-inline-end: 0; inset-block-start: calc(100% + var(--space-2)); z-index: 60; min-inline-size: 15rem;
                display: grid; padding: var(--space-2); background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
  .menu-panel a, .menu-panel button { display: flex; align-items: center; gap: var(--space-3); min-block-size: 2.75rem; padding-inline: var(--space-3);
                                      color: var(--text); text-decoration: none; background: none; border: 0; border-radius: var(--radius-sm); text-align: start; inline-size: 100%; }
  .menu-panel a:hover, .menu-panel button:hover { background: var(--surface-2); }
  .menu-panel svg { color: var(--muted); }
  .menu-panel hr { border: 0; border-block-start: 1px solid var(--line); margin-block: var(--space-2); }
  .menu-who { display: grid; padding: var(--space-2) var(--space-3) var(--space-3); border-block-end: 1px solid var(--line); margin-block-end: var(--space-2); font-size: var(--step--1); }
  .menu-who span { color: var(--muted); text-align: start; overflow-wrap: anywhere; }
  @media (max-width: 52rem) {
    /* inside the opened phone menu the account menu unfolds in place */
    .site-header .menu-panel { position: static; box-shadow: none; margin-block-start: var(--space-2); }
    .site-header .menu { flex-basis: 100%; }
  }

  .btn { display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2);
         min-block-size: 2.75rem; padding-inline: var(--space-5); border-radius: var(--radius); border: 1px solid transparent;
         font-weight: 600; text-decoration: none; line-height: 1.2;
         transition: background var(--fast), color var(--fast), border-color var(--fast), transform var(--fast); }
  .btn:active { transform: translateY(1px); }
  .btn-primary { background: var(--accent); color: var(--accent-ink); }
  .btn-primary:hover { background: color-mix(in srgb, var(--accent) 88%, black); }
  .btn-ghost { background: transparent; color: var(--text); border-color: var(--line); }
  .btn-ghost:hover { background: var(--surface-2); }
  .btn-danger { background: transparent; color: var(--danger); border-color: color-mix(in srgb, var(--danger) 45%, var(--line)); }
  .btn-danger:hover { background: color-mix(in srgb, var(--danger) 10%, var(--surface)); }
  .btn[aria-busy="true"] { opacity: .7; pointer-events: none; }

  .card, .panel { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: var(--space-5); }
  .card h3 { margin-block-end: var(--space-2); }
  .card p { color: var(--muted); }

  .hero { padding-block: var(--space-8) var(--space-7); }
  .hero p { font-size: var(--step-1); color: var(--muted); }
  .hero h1 { font-size: clamp(2.2rem, 1.6rem + 3vw, 3.6rem); line-height: 1.35; }

  /* forms */
  .field { display: grid; gap: var(--space-1); }
  .field label { font-weight: 600; font-size: var(--step--1); }
  .input { inline-size: 100%; min-block-size: 2.75rem; padding: var(--space-2) var(--space-3); background: var(--surface);
           border: 1px solid var(--line); border-radius: var(--radius-sm); transition: border-color var(--fast), box-shadow var(--fast); }
  .input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
  textarea.input { min-block-size: 8rem; resize: vertical; }
  .input[aria-invalid="true"] { border-color: var(--danger); }
  .field-error { color: var(--danger); font-size: var(--step--1); }
  input[type="email"], input[type="tel"], input[type="url"] { direction: ltr; text-align: start; }
  [dir="rtl"] input[type="email"], [dir="rtl"] input[type="tel"], [dir="rtl"] input[type="url"] { text-align: end; }

  .notice { padding: var(--space-3) var(--space-4); border-radius: var(--radius); background: var(--accent-soft); }
  .notice[data-type="error"] { background: color-mix(in srgb, var(--danger) 12%, var(--surface)); color: var(--danger); }
  .notice[data-type="warning"] { background: color-mix(in srgb, var(--warn) 14%, var(--surface)); color: var(--text); border-inline-start: 3px solid var(--warn); }

  /* content pages */
  .prose { max-inline-size: calc(var(--measure) + 2 * var(--space-4)); }
  .prose img { border-radius: var(--radius); }
  .media-card { display: grid; gap: var(--space-3); align-content: start; }
  .media-card img { border-radius: var(--radius-sm); aspect-ratio: 16 / 9; object-fit: cover; inline-size: 100%; }
  .media-card time { font-size: var(--step--1); }

  .pagination, .shell-top { display: flex; align-items: center; justify-content: space-between; gap: var(--space-3); }
  .pagination [aria-disabled="true"] { opacity: .45; pointer-events: none; }

  /* data tables (admin): scroll inside their box on phones, never widen the page */
  .table-wrap { position: relative; overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface);
                /* a soft shadow at an edge that has more columns behind it (pure CSS: the shadows scroll away at the ends) */
                background-image: linear-gradient(to right, var(--surface) 30%, transparent), linear-gradient(to left, var(--surface) 30%, transparent),
                  radial-gradient(farthest-side at 0 50%, color-mix(in srgb, var(--text) 16%, transparent), transparent), radial-gradient(farthest-side at 100% 50%, color-mix(in srgb, var(--text) 16%, transparent), transparent);
                background-position: left center, right center, left center, right center; background-repeat: no-repeat;
                background-size: 2.5rem 100%, 2.5rem 100%, .9rem 100%, .9rem 100%; background-attachment: local, local, scroll, scroll; }
  .table-wrap:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
  .table { background: transparent; }
  /* secondary columns step aside on phones, so the name, status and the action link stay in view */
  @media (max-width: 40rem) { .table .opt { display: none; } }
  .table { inline-size: 100%; border-collapse: collapse; font-size: var(--step--1); }
  .table th, .table td { padding: var(--space-3) var(--space-4); text-align: start; border-block-end: 1px solid var(--line); white-space: nowrap; }
  .table tr:last-child td, .table tr:last-child th { border-block-end: 0; }
  .table tbody th { color: inherit; font-weight: 600; } /* a row's name cell reads like the rest of the row */
  .table th { color: var(--muted); font-weight: 600; }
  .badge { display: inline-block; padding: 0 var(--space-2); border-radius: 999px; font-size: var(--step--1); background: var(--surface-2); color: var(--muted); }
  .badge[data-state="on"] { background: var(--accent-soft); color: var(--accent); }
  .link-button { background: none; border: 0; padding: 0; color: var(--danger); text-decoration: underline; text-underline-offset: .25em; }
  /* row actions: comfortable 44px tap targets without making the table look heavy */
  .table td a, .table .link-button { display: inline-flex; align-items: center; min-block-size: 2.75rem; padding-inline: var(--space-2); }

  fieldset { border: 1px solid var(--line); }
  legend { font-weight: 700; padding-inline: var(--space-2); }
  .field-hint { font-size: var(--step--1); }
  .field:has(input[type="checkbox"]) { grid-template-columns: auto 1fr; align-items: center; }
  .field:has(input[type="checkbox"]) label { order: 2; font-weight: 400; min-block-size: 2.75rem; display: flex; align-items: center; cursor: pointer; }
  .field:has(input[type="checkbox"]) .field-error, .field:has(input[type="checkbox"]) .field-hint { order: 3; grid-column: 2 / -1; }
  input[type="checkbox"] { inline-size: 1.25rem; block-size: 1.25rem; accent-color: var(--accent); }

  .site-footer { border-block-start: 1px solid var(--line); padding-block: var(--space-6); color: var(--muted); font-size: var(--step--1); }
  .site-footer .container { display: flex; flex-wrap: wrap; justify-content: space-between; gap: var(--space-4); }
  .site-footer nav a { display: inline-flex; align-items: center; min-block-size: 2.75rem; } /* easy to tap */

  /* reveal on scroll: visible by default; JS adds .js-reveal only when motion is allowed */
  .js-reveal [data-reveal] { opacity: 0; translate: 0 1rem; transition: opacity var(--slow) var(--ease), translate var(--slow) var(--ease); }
  .js-reveal [data-reveal].is-visible { opacity: 1; translate: 0 0; }

  .toast { position: fixed; inset-inline: var(--space-4); inset-block-end: var(--space-4); margin-inline: auto; max-inline-size: 28rem;
           background: var(--text); color: var(--bg); padding: var(--space-3) var(--space-4); border-radius: var(--radius); box-shadow: var(--shadow);
           opacity: 0; translate: 0 1rem; transition: opacity var(--fast), translate var(--fast) var(--ease); pointer-events: none; }
  .toast[data-show] { opacity: 1; translate: 0 0; }
}

/* --------------------------------------------------------------- learning platform */
@layer components {
  /* staff area: dark lapis sidebar (always there on laptops; a drawer on smaller screens) + top bar */
  body.admin { background: var(--bg); }
  .shell { display: grid; grid-template-columns: minmax(0, 1fr); min-block-size: 100dvh; }
  @media (min-width: 60rem) { .shell { grid-template-columns: 15.5rem minmax(0, 1fr); } }
  .sidebar { background: var(--side-bg); color: var(--side-text); padding: var(--space-4) var(--space-3); display: flex; flex-direction: column; gap: var(--space-4);
             position: sticky; inset-block-start: 0; block-size: 100dvh; overflow-y: auto; }
  .sidebar .brand { color: var(--side-strong); padding-inline: var(--space-2); min-block-size: 2.75rem; }
  .side-nav { display: flex; flex-direction: column; gap: 2px; flex: 1; }
  .side-group { color: var(--side-muted); font-size: var(--step--1); padding: var(--space-4) var(--space-3) var(--space-1); }
  .side-nav a, .side-site { display: flex; align-items: center; gap: var(--space-3); min-block-size: 2.6rem; padding-inline: var(--space-3);
                            border-radius: var(--radius-sm); color: var(--side-text); text-decoration: none; border-inline-start: 3px solid transparent; }
  .side-nav a:hover, .side-site:hover { background: var(--side-hover); }
  .side-nav a[aria-current="page"] { background: var(--side-active); border-inline-start-color: var(--gold); color: var(--side-strong); font-weight: 600; }
  .side-nav a span:not(.count) { flex: 1; }
  .side-nav .count { background: var(--gold); color: var(--gold-ink); border-radius: 999px; padding-inline: var(--space-2); font-size: var(--step--1); line-height: 1.6; font-weight: 700; }
  .side-site { color: var(--side-muted); border-block-start: 1px solid var(--side-line); border-radius: 0; padding-block-start: var(--space-2); }
  .topbar { display: flex; align-items: center; justify-content: space-between; gap: var(--space-3); min-block-size: 4rem;
            padding-inline: var(--space-5); background: var(--surface); border-block-end: 1px solid var(--line); position: sticky; inset-block-start: 0; z-index: 40; }
  .topbar-end { display: flex; align-items: center; gap: var(--space-3); margin-inline-start: auto; }
  .admin .nav-toggle { display: none; }
  .scrim { position: fixed; inset: 0; background: var(--scrim); z-index: 70; }
  @media (max-width: 59.99rem) {
    .admin .nav-toggle { display: inline-flex; }
    .sidebar { position: fixed; inset-block: 0; inset-inline-start: 0; inline-size: min(18rem, 85vw); z-index: 80;
               translate: 100% 0; visibility: hidden; transition: translate var(--slow) var(--ease), visibility var(--slow); }
    [dir="ltr"] .sidebar { translate: -100% 0; }
    .sidebar[data-open] { translate: 0 0; visibility: visible; }
    .topbar { padding-inline: var(--space-4); }
  }
  @media (max-width: 40rem) { .topbar .menu-name { display: none; } }
  .shell-main { padding-block: var(--space-6) var(--space-8); min-inline-size: 0; }
  .page-head { display: flex; flex-wrap: wrap; align-items: end; justify-content: space-between; gap: var(--space-3);
               padding-block-end: var(--space-4); border-block-end: 1px solid var(--line); }
  .page-head h1 { font-size: var(--step-2); }
  .page-head .muted { font-size: var(--step--1); }

  /* home */
  .home-hero { padding-block: var(--space-8) var(--space-7); border-block-end: 1px solid var(--line); background: var(--surface); }
  .home-hero-grid { display: grid; gap: var(--space-6); align-items: center; }
  @media (min-width: 56rem) { .home-hero-grid { grid-template-columns: 1.4fr 1fr; } }
  .home-hero h1 { font-size: clamp(2.3rem, 1.5rem + 3.5vw, 3.9rem); line-height: 1.4; }
  .home-hero .lead { font-size: var(--step-1); color: var(--muted); }
  .home-pattern { inline-size: 100%; max-inline-size: 22rem; justify-self: center; color: var(--accent); opacity: .55; }
  .home-pattern .dot { fill: var(--gold); }
  @media (max-width: 55.99rem) { .home-pattern { display: none; } }
  .steps { list-style: none; padding: 0; margin: 0; display: grid; gap: var(--space-5); counter-reset: step; }
  @media (min-width: 48rem) { .steps { grid-template-columns: repeat(3, 1fr); } }
  .steps li { counter-increment: step; display: grid; gap: var(--space-1); padding-block-start: var(--space-3); border-block-start: 2px solid var(--line); }
  .steps li::before { content: counter(step); font-family: var(--font-book); font-size: var(--step-2); color: var(--gold); line-height: 1; }
  .steps p { color: var(--muted); }
  .path-rows { list-style: none; padding: 0; margin: 0; border-block-start: 1px solid var(--line); }
  .path-rows a { display: grid; gap: var(--space-1); padding-block: var(--space-4); border-block-end: 1px solid var(--line); text-decoration: none; color: var(--text); }
  .path-rows a:hover .path-rows-title { color: var(--accent); }
  .path-rows-title { font-family: var(--font-book); font-size: var(--step-1); font-weight: 700; }
  /* only a real sequence (the lessons of a path) is numbered */
  ul.lesson-list .lesson-item { grid-template-columns: 1fr auto; }
  ul.lesson-list .lesson-item::before { display: none; }

  /* filter bars: inputs share a row and wrap only when they must */
  .cluster > .input { inline-size: auto; flex: 1 1 12rem; max-inline-size: 24rem; }
  .search-input { inline-size: auto; min-inline-size: min(100%, 14rem); flex: 1 1 14rem; }
  /* lists with a column of actions */
  .row-links { display: flex; gap: var(--space-1); }
  /* profile / settings: section links beside the sections */
  .profile-head { display: flex; align-items: center; gap: var(--space-4); padding-block-end: var(--space-4); border-block-end: 1px solid var(--line); }
  .avatar-lg { inline-size: 3.5rem; block-size: 3.5rem; font-size: var(--step-1); }
  .settings { display: grid; gap: var(--space-5); }
  @media (min-width: 52rem) { .settings { grid-template-columns: 13rem minmax(0, 1fr); align-items: start; } }
  .settings-nav { display: flex; flex-wrap: wrap; gap: var(--space-1); }
  @media (min-width: 52rem) { .settings-nav { flex-direction: column; position: sticky; inset-block-start: 5.5rem; } }
  .settings-nav a { display: flex; align-items: center; min-block-size: 2.75rem; padding-inline: var(--space-3); color: var(--muted);
                    text-decoration: none; border-radius: var(--radius-sm); }
  .settings-nav a:hover { color: var(--text); background: var(--surface-2); }
  .panel > h2 { font-size: var(--step-1); }
  .form-row { display: grid; gap: var(--space-4); }
  @media (min-width: 40rem) { .form-row { grid-template-columns: 1fr 1fr; } }
  [id] { scroll-margin-block-start: 5.5rem; }

  /* staff overview */
  .quick-actions { display: flex; flex-wrap: wrap; gap: var(--space-2); }
  .quick-actions .btn { padding-inline: var(--space-4); }
  .quick-actions svg { color: var(--accent); }
  .section-title { font-size: var(--step-1); }
  .todo { list-style: none; padding: 0; margin: 0; display: grid; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
  .todo li { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2) var(--space-4); padding: var(--space-3) var(--space-4); max-inline-size: none; }
  .todo li + li { border-block-start: 1px solid var(--line); }
  .todo-count { font-family: var(--font-book); font-size: var(--step-2); font-weight: 700; color: var(--gold); min-inline-size: 2.5rem; text-align: center; line-height: 1; font-variant-numeric: tabular-nums; }
  .todo-label { flex: 1; }
  .figures { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 10rem), 1fr)); margin: 0;
             border-block: 1px solid var(--line); }
  .figures > div { padding: var(--space-3) var(--space-4); }
  .figures > div + div { border-inline-start: 1px solid var(--line); }
  .figures dt { color: var(--muted); font-size: var(--step--1); }
  .figures dd { margin: 0; font-size: var(--step-1); font-weight: 700; font-variant-numeric: tabular-nums; }
  .row-item { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--space-3);
              padding-block: var(--space-3); border-block-end: 1px solid var(--line); }
  .link-list { list-style: none; padding: 0; margin: 0; display: grid; gap: var(--space-1); }
  .link-list a { display: inline-flex; align-items: center; gap: var(--space-2); min-block-size: 2.75rem; }
  /* two big choices (email or Telegram) */
  .choice-cards { border: 0; padding: 0; margin: 0; display: grid; gap: var(--space-2); grid-template-columns: repeat(auto-fit, minmax(min(100%, 14rem), 1fr)); }
  .choice-cards legend { font-weight: 600; font-size: var(--step--1); margin-block-end: var(--space-2); }
  .choice-card { display: flex; gap: var(--space-3); align-items: flex-start; padding: var(--space-3) var(--space-4); cursor: pointer;
                 border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
  .choice-card:has(input:checked) { border-color: var(--accent); background: var(--accent-soft); }
  .choice-card input { inline-size: 1.25rem; block-size: 1.25rem; margin-block-start: .15rem; accent-color: var(--accent); flex: none; }
  .choice-card > span { display: grid; gap: var(--space-1); }
  .choice-card .muted { font-size: var(--step--1); }
  .steps-list { margin: 0; padding-inline-start: 1.25rem; display: grid; gap: var(--space-2); }
  /* Telegram's blue, darkened enough for white text (contrast above 4.5:1) */
  .btn-telegram { background: #1c6aa3; border-color: #1c6aa3; color: #fff; }
  .btn-telegram:hover { background: #165a8b; border-color: #165a8b; }
  .btn-telegram-outline { border-color: #1c6aa3; color: light-dark(#1c6aa3, #8cc4ef); }
  .upload-list { list-style: none; padding: 0; margin: 0; display: grid; gap: var(--space-2); }
  .upload-list li { max-inline-size: none; display: grid; gap: var(--space-1); padding: var(--space-2) var(--space-3); border: 1px solid var(--line); border-radius: var(--radius-sm); }
  .upload-list .upload-name { overflow-wrap: anywhere; font-weight: 600; text-align: end; }
  .upload-list li[data-state="done"] { border-color: var(--success); }
  .upload-list li[data-state="failed"] { border-color: var(--danger); }
  .upload-list li[data-state="failed"] .lesson-meta { color: var(--danger); }
  .danger-zone { border-color: color-mix(in srgb, var(--danger) 45%, var(--line)); }
  .danger-zone h2 { color: var(--danger); }
  /* a scrollable list of tick boxes (choosing students): works with touch, no Ctrl/⌘ needed */
  .pick-list { border: 1px solid var(--line); border-radius: var(--radius); padding: var(--space-2) var(--space-3); margin: 0;
               max-block-size: 18rem; overflow-y: auto; display: grid; gap: var(--space-1); }
  .pick-list legend { padding-inline: var(--space-1); font-weight: 600; }
  .pick { display: flex; flex-wrap: wrap; align-items: baseline; gap: var(--space-2); padding-block: var(--space-1); min-block-size: 2.75rem; }
  .pick .muted { font-size: var(--step--1); }
  .activity { list-style: none; padding: 0; margin: 0; display: grid; gap: var(--space-2); font-size: var(--step--1); }
  .activity .lesson-meta { display: block; }
  /* stat tiles (kept for other pages) */
  .stats { display: grid; gap: var(--space-3); grid-template-columns: repeat(auto-fit, minmax(min(100%, 9rem), 1fr)); }
  .stat { border-block-start: 2px solid var(--line); padding-block: var(--space-2); display: grid; gap: var(--space-1); text-decoration: none; color: inherit; }
  .stat strong { font-size: var(--step-1); line-height: 1.2; font-variant-numeric: tabular-nums; }
  .stat span { color: var(--muted); font-size: var(--step--1); }
  a.stat:hover { border-color: var(--accent); }

  /* filter chips (status tabs) */
  .chips, .row-actions { display: flex; flex-wrap: wrap; gap: var(--space-2); }
  .chip { display: inline-flex; align-items: center; gap: var(--space-2); min-block-size: 2.75rem; padding-inline: var(--space-4); border: 1px solid var(--line);
          border-radius: 999px; color: var(--muted); text-decoration: none; background: var(--surface); }
  .chip[aria-current="true"] { background: var(--accent-soft); border-color: var(--accent); color: var(--accent); font-weight: 600; }

  /* progress */
  progress.progress { appearance: none; inline-size: 100%; block-size: .5rem; border: 0; border-radius: 999px; background: var(--surface-2); overflow: hidden; color: var(--accent); }
  progress.progress::-webkit-progress-bar { background: var(--surface-2); }
  progress.progress::-webkit-progress-value { background: var(--accent); border-radius: 999px; }
  progress.progress::-moz-progress-bar { background: var(--accent); border-radius: 999px; }
  .progress-row { display: flex; align-items: center; gap: var(--space-3); }
  .progress-row .progress { flex: 1; }

  /* lesson list in a path */
  .lesson-list { display: grid; gap: var(--space-2); padding: 0; list-style: none; counter-reset: lesson; }
  .lesson-item { counter-increment: lesson; display: grid; grid-template-columns: 2.25rem 1fr auto; align-items: center; gap: var(--space-3);
                 padding: var(--space-3) var(--space-4); background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); max-inline-size: none; }
  .lesson-item::before { content: counter(lesson); display: grid; place-items: center; inline-size: 2.25rem; block-size: 2.25rem; border-radius: 50%;
                         border: 1px solid var(--line); color: var(--gold); font-family: var(--font-book); font-weight: 700; font-size: var(--step-1); line-height: 1; }
  .lesson-item[data-state="done"]::before { content: "✓"; background: var(--success); border-color: var(--success); color: var(--on-success); font-family: var(--font); font-size: var(--step-0); }
  .lesson-item[data-state="locked"] { background: var(--bg); }
  .lesson-item[data-state="locked"] .lesson-title { color: var(--muted); }
  .lesson-title { font-weight: 600; text-decoration: none; color: var(--text); }
  a.lesson-title:hover { color: var(--accent); }
  .lesson-meta { font-size: var(--step--1); color: var(--muted); }

  /* protected player with a moving watermark */
  /* on wide screens the video stays a comfortable size instead of filling the whole width */
  .player { position: relative; aspect-ratio: 16 / 9; max-inline-size: 64rem; margin-inline: auto; inline-size: 100%; background: var(--player-bg); border-radius: var(--radius); overflow: hidden; }
  .player video, .player iframe { position: absolute; inset: 0; inline-size: 100%; block-size: 100%; border: 0; }
  .player-end { position: absolute; inset: 0; z-index: 3; display: grid; place-content: center; justify-items: center; gap: var(--space-4);
                background: var(--player-bg); color: var(--side-strong); text-align: center; padding: var(--space-5); }
  .player-end[hidden] { display: none; }
  .player-end .btn-ghost { color: var(--side-strong); border-color: var(--side-line); }
  .player-end .btn-ghost:hover { background: var(--side-hover); }
  .player-end p { font-family: var(--font-book); font-size: var(--step-2); }
  .watermark { position: absolute; inset-block-start: 10%; inset-inline-start: 8%; z-index: 2; pointer-events: none; user-select: none;
               color: var(--watermark); font-size: var(--step--1); text-shadow: 0 0 2px var(--watermark-shadow); transition: inset 1.2s var(--ease); direction: ltr; }
  [data-protected] { -webkit-user-select: none; user-select: none; -webkit-touch-callout: none; }

  /* lock / notice panels */
  .lock { display: grid; justify-items: center; text-align: center; gap: var(--space-3); padding-block: var(--space-7); }
  .lock svg { color: var(--muted); }

  /* quiz paper */
  .question { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: var(--space-5); display: grid; gap: var(--space-3); }
  .question legend { font-weight: 600; padding: 0; margin-block-end: var(--space-2); max-inline-size: var(--measure); }
  .question fieldset { border: 0; padding: 0; display: grid; gap: var(--space-2); }
  .option { display: flex; align-items: center; gap: var(--space-3); min-block-size: 2.75rem; padding: var(--space-2) var(--space-3); border: 1px solid var(--line);
            border-radius: var(--radius-sm); cursor: pointer; }
  .option:has(input:checked) { border-color: var(--accent); background: var(--accent-soft); }
  .option input { inline-size: 1.25rem; block-size: 1.25rem; accent-color: var(--accent); flex: none; }
  .option[data-result="correct"] { border-color: var(--success); background: color-mix(in srgb, var(--success) 10%, var(--surface)); }
  .option[data-result="wrong"] { border-color: var(--danger); background: color-mix(in srgb, var(--danger) 8%, var(--surface)); }
  .option-tag { margin-inline-start: auto; font-size: var(--step--1); font-weight: 600; white-space: nowrap; }
  .option[data-result="correct"] .option-tag { color: var(--success); }
  .option[data-result="wrong"] .option-tag { color: var(--danger); }
  .timer { position: sticky; inset-block-start: 4.5rem; z-index: 5; justify-self: end; background: var(--text); color: var(--bg); padding: var(--space-1) var(--space-4);
           border-radius: 999px; font-variant-numeric: tabular-nums; direction: ltr; }
  .timer[data-low] { background: var(--danger); }

  /* misc */
  .badge[data-state="warn"] { background: color-mix(in srgb, var(--warn) 15%, var(--surface)); color: light-dark(#92400e, #fbbf24); }
  .badge[data-state="danger"] { background: color-mix(in srgb, var(--danger) 12%, var(--surface)); color: var(--danger); }
  .kv { display: grid; grid-template-columns: max-content 1fr; gap: var(--space-2) var(--space-5); }
  .kv dt { color: var(--muted); }
  .kv dd { margin: 0; }
  .inline-form { display: inline; }
  .lesson-body { white-space: pre-line; }
  .bell { position: relative; display: inline-flex; align-items: center; gap: var(--space-1); }
  @media (min-width: 48rem) { .bell .bell-label { position: absolute; inline-size: 1px; block-size: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; } }
  a.panel { text-decoration: none; color: inherit; }
  a.panel:hover { border-color: var(--accent); }
  a.panel strong { color: var(--accent); }
  .bell .count { background: var(--accent); color: var(--accent-ink); border-radius: 999px; padding-inline: 0.4em; font-size: var(--step--1); line-height: 1.5; font-variant-numeric: tabular-nums; }
  .notice-list a { display: grid; gap: var(--space-1); padding: var(--space-3) var(--space-4); background: var(--surface); border: 1px solid var(--line);
                   border-radius: var(--radius); text-decoration: none; color: var(--text); }
  .notice-list a:hover { border-color: var(--accent); }
  .notice-list [data-unread] { border-inline-start: 3px solid var(--accent); }
  .notice-list [data-unread] strong::before { content: "● "; color: var(--accent); }
  .announcement { border-inline-start: 3px solid var(--accent); }
  .verified { display: flex; gap: var(--space-2); align-items: center; inline-size: 100%; max-inline-size: none; }
  .certificate { position: relative; display: grid; justify-items: center; gap: var(--space-3); text-align: center;
                 padding: clamp(var(--space-6), 6vw, var(--space-8)) clamp(var(--space-4), 5vw, var(--space-8));
                 background: var(--surface); border: 1px solid var(--gold); outline: 6px double color-mix(in srgb, var(--gold) 55%, transparent);
                 outline-offset: -14px; border-radius: var(--radius); }
  .certificate p { margin: 0; }
  .cert-seal { inline-size: 3.5rem; block-size: 3.5rem; color: var(--gold); }
  .cert-academy { font-family: var(--font-book, inherit); color: var(--muted); letter-spacing: .02em; }
  .cert-title { font-family: var(--font-book, inherit); font-size: var(--step-3); color: var(--accent); margin: 0; }
  .certificate .cert-name { font-family: var(--font-book, inherit); font-size: var(--step-3); font-weight: 700; line-height: 1.3;
                            border-block-end: 1px solid var(--gold); padding-inline: var(--space-4); }
  .certificate .cert-path { font-size: var(--step-2); color: var(--accent); font-weight: 600; }
  .cert-foot { display: grid; grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr)); gap: var(--space-4); inline-size: 100%;
               margin-block-start: var(--space-4); padding-block-start: var(--space-4); border-block-start: 1px solid var(--line); }
  .cert-foot > div { display: grid; gap: var(--space-1); }
  .cert-sign strong { font-family: var(--font-book, inherit); }
  .cert-url { overflow-wrap: normal; }
  .nowrap { white-space: nowrap; }
  details.panel:not([open]) { padding-block: var(--space-3); } /* a closed section is just its title line */
  @media print {
    .site-header, .site-footer, .no-print, .skip-link { display: none !important; }
    body { background: none; }
    .certificate { break-inside: avoid; margin-block-start: 15vh; }
  }
  .btn[aria-pressed="true"] { background: var(--accent-soft); border-color: var(--accent); color: var(--accent); }
  .file-list li { display: flex; flex-wrap: wrap; gap: var(--space-2); align-items: center; }
  .setup summary { cursor: pointer; display: flex; flex-wrap: wrap; gap: var(--space-2); align-items: baseline; }
  .notice-list, .file-list, .setup-list { list-style: none; padding: 0; margin: 0; display: grid; gap: var(--space-2); }
  /* server checks: a round status mark, the label, the detail; thin lines between rows (no side bars) */
  .setup-list { gap: 0; }
  .setup-list li { display: grid; grid-template-columns: 1.5rem minmax(10rem, 16rem) minmax(0, 1fr); gap: var(--space-1) var(--space-3);
                   align-items: baseline; padding-block: var(--space-3); border-block-end: 1px solid var(--line); }
  .setup-list li:last-child { border-block-end: 0; }
  .setup-list li::before { content: "✓" / ""; display: inline-grid; place-items: center; inline-size: 1.5rem; block-size: 1.5rem; align-self: start;
                           border-radius: 50%; font-size: .8rem; font-weight: 700; line-height: 1; background: var(--accent-soft); color: var(--accent); }
  .setup-list li[data-state="warn"]::before { content: "!" / ""; background: color-mix(in srgb, var(--warn) 18%, var(--surface)); color: light-dark(#7a4b00, #fbbf24); }
  .setup-list li[data-state="off"]::before { content: "–" / ""; background: var(--surface-2); color: var(--muted); }
  .setup-list li[data-state="off"] { color: var(--muted); }
  .setup-list li > :nth-child(2) { color: var(--muted); overflow-wrap: anywhere; justify-self: start; }
  .setup-list li > .row-actions { grid-column: 2 / -1; }
  @media (max-width: 40rem) { .setup-list li { grid-template-columns: 1.5rem minmax(0, 1fr); } .setup-list li > :nth-child(n+2) { grid-column: 2; } }
  .score { font-size: var(--step-3); font-weight: 700; line-height: 1.2; font-variant-numeric: tabular-nums; }
  select.input { appearance: auto; }
  .options-editor { display: grid; gap: var(--space-2); }
  .option-row { display: grid; grid-template-columns: 1fr 1fr auto; gap: var(--space-2); align-items: center; }
  @media (max-width: 40rem) { .option-row { grid-template-columns: 1fr; } }
  [hidden] { display: none !important; }
  .empty { text-align: center; color: var(--muted); padding: var(--space-7) var(--space-4); }
  .code-box { font-family: var(--font-mono); background: var(--surface-2); padding: var(--space-2) var(--space-3); border-radius: var(--radius-sm); direction: ltr; overflow-wrap: anywhere; }
  .code-link { display: block; text-align: start; user-select: all; font-size: var(--text-sm, .875rem); }
  .two-col { display: grid; gap: var(--space-5); }
  /* Side by side only when the space for the content (not the window) is wide enough: in the staff area the sidebar
     takes 15.5rem, so at a 1024px window the side column would be too narrow for date fields. */
  main { container-type: inline-size; }
  @container (min-width: 60rem) { .two-col { grid-template-columns: 2fr 1fr; align-items: start; } }
  .input { min-inline-size: 0; max-inline-size: 100%; }
  input[type="datetime-local"].input, input[type="date"].input { inline-size: 100%; }
  /* grid children may shrink below their content (wide tables scroll inside .table-wrap instead of widening the page) */
  .two-col > *, .grid > *, .split > * { min-inline-size: 0; }
  select.input { max-inline-size: 100%; }
  .table td.wrap { white-space: normal; min-inline-size: 14rem; }
  .table input[type="checkbox"] { margin: 0; }
  .table .check { inline-size: 2.75rem; }
  .table label.tap { display: inline-grid; place-items: center; min-inline-size: 2.75rem; min-block-size: 2.75rem; cursor: pointer; }
}

/* --------------------------------------------------------------- utilities (few, on purpose) */
@layer utilities {
  /* Screen-reader-only text. Keep a positioned ancestor (header, .table-wrap, .field...) nearby: an absolute box inside
     an RTL scroller can otherwise land off-screen and widen the whole page. */
  .visually-hidden { position: absolute !important; inline-size: 1px; block-size: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
  .muted { color: var(--muted); }
  .center { text-align: center; margin-inline: auto; }
}

/* smooth page-to-page changes on same-origin links (ignored where unsupported) */
@media (prefers-reduced-motion: no-preference) { @view-transition { navigation: auto; } }

/* --------------------------------------------------------------- Admin → Branding */
@layer components {
  .branding { display: grid; gap: var(--space-5); align-items: start; }
  @media (min-width: 64rem) { .branding { grid-template-columns: minmax(0, 1fr) 22rem; } .branding-preview { position: sticky; inset-block-start: var(--space-5); } }
  .branding-pair { display: grid; gap: var(--space-4); grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); }
  .preset-grid { display: grid; gap: var(--space-3); grid-template-columns: repeat(auto-fill, minmax(9.5rem, 1fr)); }
  .preset-card { display: flex; flex-direction: column; align-items: center; gap: var(--space-2); padding: var(--space-4) var(--space-3);
                 background: var(--surface); color: var(--text); border: 1px solid var(--line); border-radius: var(--radius); min-block-size: 9rem; }
  .preset-card:hover { border-color: var(--accent); }
  .preset-card[aria-pressed="true"] { border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent); }
  .preset-name { font-size: var(--step-0); line-height: 1.4; text-align: center; }
  .mark-choices { display: flex; flex-wrap: wrap; gap: var(--space-3); }
  .mark-choice { display: flex; flex-direction: column; align-items: center; gap: var(--space-1); padding: var(--space-3); min-inline-size: 6.5rem;
                 border: 1px solid var(--line); border-radius: var(--radius); cursor: pointer; font-size: var(--step--1); }
  .mark-choice:has(input:checked) { border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent); }
  .mark-choice input { position: absolute; opacity: 0; pointer-events: none; }
  .mark-choice:has(input:focus-visible) { outline: 3px solid var(--focus); outline-offset: 2px; }
  .current-asset { display: flex; align-items: center; gap: var(--space-2); }
  .current-asset img { block-size: 2.25rem; inline-size: auto; background: var(--surface-2); border-radius: var(--radius-sm); padding: 2px; }
  .color-grid { display: grid; gap: var(--space-4); grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr)); }
  .color-field { display: grid; grid-template-columns: auto 1fr; align-items: center; gap: var(--space-1) var(--space-3); }
  .color-field input[type="color"] { inline-size: 3rem; block-size: 2.75rem; padding: 2px; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--surface); }
  .color-field label { display: flex; flex-direction: column; line-height: 1.5; }
  .color-field .field-error { grid-column: 1 / -1; }
  .preview-head { justify-content: space-between; }
  .preview-head h2 { font-size: var(--step-1); }
  .seg { display: inline-flex; gap: 0; }
  .seg .btn { min-block-size: 2.75rem; padding-block: var(--space-1); }
  .seg .btn[aria-pressed="true"] { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
  .seg .btn:first-child { border-start-end-radius: 0; border-end-end-radius: 0; }
  .seg .btn:last-child { border-start-start-radius: 0; border-end-start-radius: 0; }
  .ff-readex { font-family: "Readex Pro", sans-serif; } .ff-plex { font-family: "IBM Plex Sans Arabic", sans-serif; } .ff-amiri { font-family: "Amiri", serif; }
  .ff-reem { font-family: "Reem Kufi", sans-serif; } .ff-tajawal { font-family: "Tajawal", sans-serif; } .ff-ruqaa { font-family: "Aref Ruqaa", serif; }
  .ff-naskh { font-family: "Noto Naskh Arabic", serif; } .ff-messiri { font-family: "El Messiri", sans-serif; } .ff-almarai { font-family: "Almarai", sans-serif; }

  /* the preview: a small page painted with the --bp-* values the script computes (without JS: the saved look) */
  .bp { --bp-bg: var(--bg); --bp-surface: var(--surface); --bp-text: var(--text); --bp-muted: var(--muted); --bp-line: var(--line);
        --bp-accent: var(--accent); --bp-accent-ink: var(--accent-ink); --bp-gold: var(--gold); --bp-gold-ink: var(--gold-ink);
        --bp-soft: var(--accent-soft); --bp-font: var(--font); --bp-head: var(--font-book); --bp-weight: var(--heading-weight); --bp-radius: var(--radius);
        background: var(--bp-bg); color: var(--bp-text); font-family: var(--bp-font);
        border: 1px solid var(--bp-line); border-radius: var(--bp-radius); overflow: hidden; }
  .bp .brand-mark .m1 { fill: var(--bp-m1, var(--mark)); } .bp .brand-mark .m2 { fill: var(--bp-m2, var(--mark-2)); } .bp .brand-mark .m3 { fill: var(--bp-m3, var(--mark-soft)); }
  .bp .brand-mark .m1-line { stroke: var(--bp-m1, var(--mark)); } .bp .brand-mark .m2-line { stroke: var(--bp-m2, var(--mark-2)); }
  .bp-top { display: flex; align-items: center; justify-content: space-between; gap: var(--space-2); padding: var(--space-3) var(--space-4);
            background: var(--bp-surface); border-block-end: 1px solid var(--bp-line); }
  .bp-brand { display: inline-flex; align-items: center; gap: var(--space-2); }
  .bp-logo { block-size: 1.75rem; inline-size: auto; }
  .bp-name { font-family: var(--bp-head); font-weight: var(--bp-weight); font-size: var(--step-1); color: var(--bp-accent); }
  .bp-body { display: flex; flex-direction: column; gap: var(--space-3); padding: var(--space-4); }
  .bp-title { font-family: var(--bp-head); font-weight: var(--bp-weight); font-size: var(--step-2); line-height: 1.3; }
  .bp-text { color: var(--bp-muted); font-size: var(--step--1); }
  .bp-bar { block-size: .5rem; border-radius: 99px; background: var(--bp-line); overflow: hidden; }
  .bp-bar span { display: block; inline-size: 40%; block-size: 100%; background: var(--bp-accent); }
  .bp-row { display: flex; justify-content: space-between; align-items: center; gap: var(--space-2); padding: var(--space-2) var(--space-3);
            background: var(--bp-surface); border: 1px solid var(--bp-line); border-radius: var(--bp-radius); font-size: var(--step--1); }
  .bp-row-now { border: 2px solid var(--bp-gold); }
  .bp-pill { font-size: .8rem; padding: 0 var(--space-2); border-radius: 99px; background: var(--bp-soft); color: var(--bp-accent); }
  .bp-pill-now { background: var(--bp-gold); color: var(--bp-gold-ink); }
  .bp-btn { display: inline-block; background: var(--bp-accent); color: var(--bp-accent-ink); border-radius: var(--bp-radius); padding: var(--space-1) var(--space-4); font-size: var(--step--1); font-weight: 500; }
  .bp-btn-alt { background: var(--bp-gold); color: var(--bp-gold-ink); }
}

/* --------------------------------------------------------------- path overview (about, readings) */
@layer components {
  .path-actions { gap: var(--space-4); }
  .jump-links { display: flex; flex-wrap: wrap; gap: var(--space-4); font-size: var(--step--1); }
  .intro-video { aspect-ratio: 16 / 9; inline-size: 100%; max-inline-size: 52rem; border-radius: var(--radius); overflow: hidden; background: var(--player-bg); }
  .intro-video iframe { display: block; inline-size: 100%; block-size: 100%; border: 0; }
  .path-facts { display: flex; flex-wrap: wrap; gap: var(--space-1) var(--space-4); color: var(--muted); font-size: var(--step--1); }
  .path-facts span + span::before { content: "·"; margin-inline-end: var(--space-4); color: var(--line); }
  .prerequisites h3 { font-size: var(--step-0); }
  .reading-list { display: grid; gap: var(--space-3); padding: 0; }
  .reading-item { display: flex; gap: var(--space-3); align-items: flex-start; padding: var(--space-3) var(--space-4);
                  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); }
  .reading-item > svg { flex: none; color: var(--gold); margin-block-start: .25rem; }
  .reading-title { font-weight: 600; }
  .overview-fields { border: 1px solid var(--line); border-radius: var(--radius); padding: var(--space-4); }
  .field-heading { font-size: var(--step-0); font-family: var(--font); }
  .reading-row { display: grid; gap: var(--space-3); grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr));
                 padding-block-end: var(--space-3); border-block-end: 1px dashed var(--line); }
}

/* --------------------------------------------------------------- paths (sets of courses) */
@layer components {
  .program-kind { display: inline-flex; align-items: center; gap: var(--space-1); color: var(--accent); font-weight: 500; }
  .stage-title { font-size: var(--step-0); color: var(--muted); font-weight: 600; }
  .continue-grid { display: grid; gap: var(--space-4); grid-template-columns: repeat(auto-fill, minmax(min(100%, 17rem), 1fr)); }
  .continue-card { display: grid; gap: var(--space-2); text-decoration: none; color: inherit; }
  .continue-card:hover strong, .continue-card:focus-visible strong { color: var(--accent); }
  .continue-card .lesson-meta { overflow-wrap: anywhere; }
}

/* --------------------------------------------------------------- certificate design (staff) */
@layer components {
  .cert-stage { position: relative; inline-size: 100%; max-inline-size: 60rem; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden;
    background: #fff; cursor: crosshair; direction: ltr; aspect-ratio: 297 / 210; }
  .cert-stage > [data-surface] { display: block; inline-size: 100%; block-size: 100%; object-fit: fill; }
  .cert-marker { position: absolute; transform: translate(-50%, -50%); text-align: center; white-space: nowrap; overflow: hidden; line-height: 1.5;
    outline: 1px dashed color-mix(in srgb, var(--accent) 60%, transparent); outline-offset: 2px; pointer-events: none; }
  .cert-marker[data-active="true"] { outline: 2px solid var(--accent); background: color-mix(in srgb, var(--accent) 8%, transparent); }
  .cert-stage[data-failed] { cursor: default; }
  .cert-fields { display: grid; gap: var(--space-4); grid-template-columns: repeat(auto-fit, minmax(min(100%, 18rem), 1fr)); }
  .cert-grid { display: grid; gap: var(--space-3); grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .cert-grid input[type="color"] { min-block-size: 2.5rem; padding: var(--space-1); }
}

/* --------------------------------------------------------------- content & marketing */
@layer components {
  .tabs { display: flex; flex-wrap: wrap; gap: var(--space-1); border-block-end: 1px solid var(--line); }
  .tabs a { padding: var(--space-2) var(--space-4); text-decoration: none; color: var(--muted); border-block-end: 2px solid transparent; margin-block-end: -1px; }
  .tabs a[aria-current="page"] { color: var(--text); border-block-end-color: var(--accent); font-weight: 600; }
  .thumb-sm { inline-size: 3.5rem; block-size: 2.25rem; object-fit: cover; border-radius: calc(var(--radius) / 2); vertical-align: middle; margin-inline-end: var(--space-2); }
  .thumb-preview { max-block-size: 6rem; max-inline-size: 12rem; border-radius: calc(var(--radius) / 2); vertical-align: middle; }
  .with-thumb { display: flex; align-items: center; flex-wrap: wrap; gap: var(--space-2); }

  /* a card with a picture on top (courses, paths, posts) */
  .card-media { margin: calc(var(--space-5) * -1) calc(var(--space-5) * -1) 0; aspect-ratio: 16 / 9; overflow: hidden;
    border-start-start-radius: inherit; border-start-end-radius: inherit; background: var(--surface-2, var(--line)); }
  .card-media img { display: block; inline-size: 100%; block-size: 100%; object-fit: cover; transition: transform .4s ease; }
  .card:hover .card-media img { transform: scale(1.03); }
  @media (prefers-reduced-motion: reduce) { .card:hover .card-media img { transform: none; } }

  /* posts */
  .post-date { color: var(--muted); font-size: var(--step--1); }
  .post-article { max-inline-size: 46rem; margin-inline: auto; }
  .post-hero { aspect-ratio: 16 / 9; border-radius: var(--radius); overflow: hidden; }
  .post-hero img { inline-size: 100%; block-size: 100%; object-fit: cover; display: block; }

  /* home banners: one at a time; arrows and dots when there are several */
  .banners { position: relative; border-radius: var(--radius); overflow: hidden; background: var(--accent); color: var(--accent-ink); isolation: isolate; }
  .banner { display: grid; min-block-size: clamp(14rem, 34vw, 24rem); align-items: end; }
  .banner[hidden] { display: none; }
  .banner > img { grid-area: 1 / 1; inline-size: 100%; block-size: 100%; object-fit: cover; z-index: -2; }
  .banner > .banner-body { grid-area: 1 / 1; padding: clamp(1.25rem, 4vw, 3rem); max-inline-size: 42rem; }
  .banner.has-image::after { content: ""; grid-area: 1 / 1; z-index: -1;
    background: linear-gradient(to top, rgb(0 0 0 / .62), rgb(0 0 0 / .15) 70%, transparent); }
  .banner.has-image { color: #fff; }
  .banner h2 { color: inherit; font-size: var(--step-3); margin-block-end: var(--space-2); }
  .banner p { color: inherit; opacity: .92; }
  .banner .btn { margin-block-start: var(--space-3); }
  .banner.has-image .btn-primary { background: #fff; color: #1d1d1d; }
  .banner-controls { position: absolute; inset-block-start: var(--space-3); inset-inline-end: var(--space-3); display: flex; gap: var(--space-1); align-items: center; }
  .banner-controls button { inline-size: 2.25rem; block-size: 2.25rem; border-radius: 50%; border: 0; background: rgb(0 0 0 / .35); color: #fff;
    display: grid; place-items: center; cursor: pointer; }
  .banner-controls button:focus-visible { outline: 2px solid #fff; outline-offset: 2px; }
  .banner-dots { display: flex; gap: var(--space-1); margin-inline: var(--space-2); }
  .banner-dots button { inline-size: .7rem; block-size: .7rem; padding: 0; }
  .banner-dots button[aria-current="true"] { background: #fff; }
}
@layer components { [data-banner-prev] svg { rotate: 180deg; } }
@layer components {
  .section-tight { padding-block: var(--space-4) 0; }
  .section-head { justify-content: space-between; align-items: baseline; }
}
@layer components {
  .lesson-thumb { inline-size: 5.5rem; aspect-ratio: 16 / 9; object-fit: cover; border-radius: calc(var(--radius) / 2); flex: none; }
  @media (max-width: 30rem) { .lesson-thumb { inline-size: 4rem; } }
}
@layer components {
  .lesson-item:has(> .lesson-thumb) { grid-template-columns: 2.25rem auto 1fr auto; }
  ul.lesson-list .lesson-item:has(> .lesson-thumb) { grid-template-columns: auto 1fr auto; }
}
@layer components {
  .banner { grid-template-columns: minmax(0, 1fr); }
  /* on the plain colour (no picture) the button is drawn the other way round so it stands out */
  .banner:not(.has-image) .btn-primary { background: var(--accent-ink); color: var(--accent); }
}
@layer components {
  /* room above the text for the arrows and dots, so they never sit on the title */
  .banners:has([data-banner-controls]:not([hidden])) .banner-body { padding-block-start: 3.75rem; }
}
@layer components {
  .lesson-done { display: inline-flex; align-items: center; gap: var(--space-2); color: var(--accent); font-weight: 600; }
  .next-hint { flex: 1 1 14rem; text-align: center; align-self: center; }
}
@layer components { .pagination { flex-wrap: wrap; } }
@layer components {
  .course-tabs button { background: none; border: 0; border-block-end: 2px solid transparent; margin-block-end: -1px; padding: var(--space-2) var(--space-4);
    font: inherit; color: var(--muted); cursor: pointer; display: inline-flex; gap: var(--space-2); align-items: center; }
  .course-tabs button[aria-selected="true"] { color: var(--text); border-block-end-color: var(--accent); font-weight: 600; }
  .course-tabs button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
  .course-tabs .count { font-size: var(--step--1); color: var(--muted); }
}
@layer components {
  .home-hero-image { inline-size: 100%; max-block-size: 26rem; object-fit: cover; border-radius: var(--radius); }
}
@layer components {
  .home-section { border: 1px solid var(--line); border-radius: var(--radius); padding: var(--space-3) var(--space-4); background: var(--surface); }
  .home-section summary { cursor: pointer; color: var(--muted); font-size: var(--step--1); }
  .home-section details[open] > summary { margin-block-end: var(--space-3); }
  .home-section-head { display: inline-flex; align-items: center; gap: var(--space-3); }
  .order-input { inline-size: 4.5rem; }
}
@layer components {
  .recorder audio { inline-size: 100%; max-inline-size: 32rem; }
  .rec-dot { inline-size: .65rem; block-size: .65rem; border-radius: 50%; background: currentColor; display: inline-block; }
  .is-recording { background: var(--danger); border-color: var(--danger); color: #fff; }
  .is-recording .rec-dot { animation: rec-pulse 1s ease-in-out infinite; }
  @keyframes rec-pulse { 50% { opacity: .25; } }
  @media (prefers-reduced-motion: reduce) { .is-recording .rec-dot { animation: none; } }
  .field-label { font-weight: 600; }
  .assignment-list { display: grid; gap: var(--space-3); padding: 0; list-style: none; }
  .assignment-item { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--space-2) var(--space-4); }
  .answer-box { white-space: pre-wrap; overflow-wrap: anywhere; }
}
@layer components {
  .btn-small { padding: var(--space-1) var(--space-3); font-size: var(--step--1); }
  .seo-fields > summary { cursor: pointer; display: flex; flex-wrap: wrap; gap: var(--space-2); align-items: baseline; }
  .seo-fields[open] > summary { margin-block-end: var(--space-3); }
  .ai-suggest { margin-block-start: calc(var(--space-2) * -1); }
}
@layer components {
  .nav-search { display: inline-flex; align-items: center; gap: var(--space-1); color: var(--text); text-decoration: none; }
  @media (min-width: 48rem) { .nav-search .nav-search-label { position: absolute; inline-size: 1px; block-size: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; } }
  .search-form { display: flex; gap: var(--space-2); max-inline-size: 40rem; }
  .search-form .input { flex: 1; min-inline-size: 0; }
  .search-results { list-style: none; padding: 0; display: grid; gap: var(--space-3); }
  .search-results li { display: grid; gap: var(--space-1); padding-block-end: var(--space-3); border-block-end: 1px solid var(--line); }
  .search-results p { margin: 0; }
  .section-title .count, h2 .count { font-size: var(--step--1); color: var(--muted); font-weight: 400; }
}
@layer components {
  .staff-search { position: relative; flex: 1; max-inline-size: 30rem; display: flex; align-items: center; gap: var(--space-2);
    background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding-inline: var(--space-3); color: var(--muted); }
  .staff-search:focus-within { border-color: var(--accent); }
  .staff-search .input { border: 0; background: transparent; padding-inline: 0; flex: 1; min-inline-size: 0; box-shadow: none; outline: none; }
  .staff-search-kbd { font: inherit; font-size: .75rem; border: 1px solid var(--line); border-radius: 6px; padding: 0 .4em; color: var(--muted); white-space: nowrap; }
  @media (max-width: 40rem) { .staff-search-kbd { display: none; } }
  .staff-search-panel { position: absolute; inset-block-start: calc(100% + 4px); inset-inline: 0; z-index: 30; max-block-size: min(70vh, 30rem); overflow: auto;
    background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: 0 10px 30px rgb(0 0 0 / .12); padding: var(--space-2); }
  .staff-search-group { margin: var(--space-2) var(--space-2) var(--space-1); font-size: var(--step--1); color: var(--muted); font-weight: 600; }
  .staff-search-option { display: flex; justify-content: space-between; gap: var(--space-3); padding: var(--space-2); border-radius: calc(var(--radius) / 2); color: var(--text); text-decoration: none; }
  .staff-search-option:hover, .staff-search-option[aria-selected="true"] { background: var(--surface-2); }
  .staff-search-option .lesson-meta { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-inline-size: 45%; }
}

/* --------------------------------------------------------------- phones: app-like bottom bar, its sheet, cards for tables
   The bar shows only on phone widths (portrait phones, small tablets and folded foldables); wider screens keep the header
   and the staff sidebar. Notches and the home indicator are kept clear with the safe-area insets (viewport-fit=cover). */
@layer layout {
  /* the side insets of a phone held sideways (physical left/right: that's how the notch is reported) */
  body { padding-left: env(safe-area-inset-left); padding-right: env(safe-area-inset-right); }
}
@layer components {
  .tabbar { display: none; --tabbar-h: 3.75rem; }
  @media (max-width: 47.99rem) {
    .tabbar { display: grid; grid-auto-flow: column; grid-auto-columns: minmax(0, 1fr); justify-content: center;
              position: fixed; inset-inline: 0; inset-block-end: 0; z-index: 60;
              background: color-mix(in srgb, var(--surface) 94%, transparent); border-block-start: 1px solid var(--line);
              padding-block-end: env(safe-area-inset-bottom); padding-left: env(safe-area-inset-left); padding-right: env(safe-area-inset-right);
              transition: translate var(--slow) var(--ease); }
    @supports (backdrop-filter: blur(1px)) { .tabbar { background: color-mix(in srgb, var(--surface) 82%, transparent); backdrop-filter: saturate(1.6) blur(14px); } }
    body:has(> .tabbar), .admin:has(.tabbar) { padding-block-end: calc(3.75rem + env(safe-area-inset-bottom)); }
    /* out of the way while typing (the on-screen keyboard is up) */
    .is-typing .tabbar { translate: 0 110%; }
    body:has(.tabbar) .toast { inset-block-end: calc(3.75rem + env(safe-area-inset-bottom) + var(--space-3)); }
  }
  /* wide phones and open foldables: the buttons stay thumb-sized, centred, instead of stretching */
  @media (min-width: 30rem) and (max-width: 47.99rem) { .tabbar { grid-auto-columns: minmax(0, 7rem); } }

  .tab { position: relative; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: .15rem;
         min-block-size: 3.75rem; padding: .3rem .1rem; color: var(--muted); background: none; border: 0; text-decoration: none;
         font-size: .72rem; line-height: 1.25; -webkit-tap-highlight-color: transparent; touch-action: manipulation; }
  .tab-label { max-inline-size: 100%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; padding-inline: .1rem; }
  .tab-icon { position: relative; display: grid; place-items: center; inline-size: min(3.5rem, 100%); block-size: 1.95rem; border-radius: 999px;
              transition: background var(--fast), scale var(--fast); }
  .tab:hover { color: var(--text); }
  .tab[aria-current="page"], .tab.is-active, .tab[aria-expanded="true"] { color: var(--accent); font-weight: 600; }
  .tab[aria-current="page"] .tab-icon, .tab.is-active .tab-icon, .tab[aria-expanded="true"] .tab-icon { background: var(--accent-soft); }
  .tab:active .tab-icon { scale: .9; }
  .tab:focus-visible { outline: none; }
  .tab:focus-visible .tab-icon { outline: 2px solid var(--accent); outline-offset: 2px; }
  .tab-badge { position: absolute; inset-block-start: -.2rem; inset-inline-end: .3rem; min-inline-size: 1.15rem; block-size: 1.15rem; padding-inline: .25rem;
               display: grid; place-items: center; border-radius: 999px; background: var(--danger); color: #fff; font-size: .66rem; font-weight: 700; line-height: 1;
               box-shadow: 0 0 0 2px var(--surface); }
  /* small phones (320–360 px): a little tighter */
  @media (max-width: 22.5rem) { .tab { font-size: .66rem; } .tab-icon { block-size: 1.8rem; } }
  @media (max-width: 20.5rem) { .tab { font-size: .6rem; } }

  /* a group's items: a sheet rising from the bottom, or a pop-up in the middle. It is a [popover] (top layer, Escape
     and tap-outside close it); without popover support lms.js toggles .is-open instead. */
  .tab-sheet { display: none; position: fixed; z-index: 90; margin: 0; border: 0; color: var(--text); background: var(--surface);
               box-shadow: 0 -8px 40px rgb(0 0 0 / .22); padding: var(--space-3) var(--space-4) calc(var(--space-4) + env(safe-area-inset-bottom));
               max-block-size: 85dvh; overflow-y: auto; overscroll-behavior: contain; }
  .tab-sheet.is-open { display: block; }
  @supports selector(:popover-open) { .tab-sheet:popover-open { display: block; } }
  .tab-sheet[data-style="sheet"] { inset: auto 0 0 0; inline-size: 100%; max-inline-size: 100%; border-radius: 1.4rem 1.4rem 0 0;
                                   padding-left: max(var(--space-4), env(safe-area-inset-left)); padding-right: max(var(--space-4), env(safe-area-inset-right)); }
  .tab-sheet[data-style="popup"] { inset: 0; margin: auto; inline-size: min(23rem, calc(100% - 2rem)); block-size: fit-content; border-radius: 1.4rem;
                                   padding-block-end: var(--space-4); box-shadow: var(--shadow); }
  .tab-sheet::backdrop { background: var(--scrim); }
  .tab-sheet-backdrop { position: fixed; inset: 0; z-index: 89; background: var(--scrim); } /* (older browsers only) */
  @media (prefers-reduced-motion: no-preference) {
    .tab-sheet { transition: translate var(--slow) var(--ease), opacity var(--slow) var(--ease), scale var(--slow) var(--ease), overlay var(--slow) allow-discrete, display var(--slow) allow-discrete; }
    .tab-sheet::backdrop { transition: opacity var(--slow), overlay var(--slow) allow-discrete, display var(--slow) allow-discrete; opacity: 0; }
    .tab-sheet:popover-open::backdrop { opacity: 1; }
    @starting-style { .tab-sheet:popover-open::backdrop { opacity: 0; } }
    .tab-sheet[data-style="sheet"]:not(:popover-open):not(.is-open) { translate: 0 100%; }
    .tab-sheet[data-style="popup"]:not(:popover-open):not(.is-open) { opacity: 0; scale: .94; }
    @starting-style { .tab-sheet[data-style="sheet"]:popover-open { translate: 0 100%; } .tab-sheet[data-style="popup"]:popover-open { opacity: 0; scale: .94; } }
    .tab-sheet.is-dragging { transition: none; }
  }
  .tab-sheet-grip { inline-size: 2.6rem; block-size: .3rem; border-radius: 999px; background: var(--line); margin: 0 auto var(--space-3); }
  .tab-sheet[data-style="popup"] .tab-sheet-grip { display: none; }
  .tab-sheet-head { display: flex; align-items: center; justify-content: space-between; gap: var(--space-3); margin-block-end: var(--space-3); }
  .tab-sheet-head h2 { font-size: var(--step-1, 1.15rem); }
  .tab-sheet-close { display: inline-grid; place-items: center; inline-size: 2.75rem; block-size: 2.75rem; border-radius: 50%; border: 0;
                     background: var(--surface-2); color: var(--text); }
  .tab-sheet-grid { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(5.4rem, 1fr)); gap: var(--space-2); }
  .tab-sheet-item { display: flex; flex-direction: column; align-items: center; gap: var(--space-2); padding: var(--space-2) var(--space-1);
                    border-radius: var(--radius); color: var(--text); text-decoration: none; text-align: center; font-size: var(--step--1); line-height: 1.3;
                    -webkit-tap-highlight-color: transparent; }
  .tab-sheet-item:hover, .tab-sheet-item:focus-visible { background: var(--surface-2); }
  .tab-sheet-tile { position: relative; display: grid; place-items: center; inline-size: 3.4rem; block-size: 3.4rem; border-radius: 1.05rem;
                    background: var(--accent-soft); color: var(--accent); transition: scale var(--fast); }
  .tab-sheet-item:active .tab-sheet-tile { scale: .92; }
  .tab-sheet-item[aria-current="page"] .tab-sheet-tile { background: var(--accent); color: var(--accent-ink); }
  .tab-sheet-tile .tab-badge { inset-inline-end: -.3rem; inset-block-start: -.3rem; }
  .tab-sheet-foot { display: flex; justify-content: center; margin-block-start: var(--space-3); padding-block-start: var(--space-3); border-block-start: 1px solid var(--line); }
  .tab-sheet-foot .btn { display: inline-flex; align-items: center; gap: var(--space-2); }

  /* tables as cards on narrow screens: lms.js labels each cell with its column (data-cards); without it they scroll */
  @media (max-width: 40rem) {
    .table-wrap:has(> .table[data-cards]) { border: 0; background: none; overflow: visible; }
    .table[data-cards] thead { position: absolute; inline-size: 1px; block-size: 1px; overflow: hidden; clip-path: inset(50%); }
    .table[data-cards], .table[data-cards] tbody, .table[data-cards] tr { display: block; }
    .table[data-cards] tr { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: var(--space-2) var(--space-3); }
    .table[data-cards] tr + tr { margin-block-start: var(--space-3); }
    .table[data-cards] td, .table[data-cards] tbody th { display: grid; grid-template-columns: minmax(5.5rem, 34%) minmax(0, 1fr); gap: var(--space-3); align-items: center;
                                                         padding: var(--space-2) 0; border-block-end: 1px dashed var(--line); white-space: normal; overflow-wrap: anywhere; }
    .table[data-cards] tr > :last-child { border-block-end: 0; }
    .table[data-cards] [data-label]::before { content: attr(data-label); color: var(--muted); font-size: .8rem; font-weight: 600; }
    .table[data-cards] [data-label=""] { display: block; }
    .table[data-cards] [data-label=""]::before { content: none; }
    .table[data-cards] .row-links { display: flex; flex-wrap: wrap; gap: var(--space-3); justify-content: flex-end; }
    .table[data-cards] .row-links::before { content: none; }
    .table[data-cards] .opt { display: grid; } /* every column has room in a card */
  }

  /* admin → Menus: the phone settings, the icon picker and items inside a group */
  .choice-cards { display: grid; gap: var(--space-3); grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); border: 0; padding: 0; }
  .choice-cards legend { margin-block-end: var(--space-2); font-weight: 600; }
  .choice-card { display: grid; grid-template-columns: auto auto 1fr; gap: var(--space-3); align-items: center; padding: var(--space-3);
                 border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); cursor: pointer; }
  .choice-card:has(:checked) { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent); }
  .choice-card strong { display: block; }
  .choice-card .muted { font-size: var(--step--1); }
  .style-demo { position: relative; inline-size: 2.6rem; block-size: 4.2rem; border: 2px solid var(--line); border-radius: .6rem; background: var(--surface-2); overflow: hidden; }
  .style-demo i { position: absolute; background: var(--accent); opacity: .75; }
  .style-demo[data-style="sheet"] i { inset: auto 0 0 0; block-size: 45%; border-radius: .4rem .4rem 0 0; }
  .style-demo[data-style="popup"] i { inset: 30% 15%; border-radius: .35rem; }
  .icon-picker { border: 0; padding: 0; display: flex; flex-wrap: wrap; gap: var(--space-2); }
  .icon-picker legend { margin-block-end: var(--space-2); font-weight: 600; inline-size: 100%; }
  .icon-choice { position: relative; display: inline-grid; place-items: center; min-inline-size: 2.9rem; block-size: 2.9rem; padding-inline: var(--space-2);
                 border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); color: var(--muted); cursor: pointer; }
  .icon-choice input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
  .icon-choice:has(:checked) { color: var(--accent); border-color: var(--accent); background: var(--accent-soft); }
  .icon-choice:has(:focus-visible) { outline: 2px solid var(--accent); outline-offset: 2px; }
  .icon-choice-auto { font-size: var(--step--1); }
  .menu-child td:nth-child(3) { padding-inline-start: var(--space-6, 2rem); }

  /* the page shown by the service worker when there is no connection */
  .offline-page { min-block-size: 100dvh; display: grid; place-items: center; padding: var(--space-5) var(--space-4); }
  .offline-card { max-inline-size: 28rem; text-align: center; align-items: center; }
}
@layer components {
  /* staff topbar on phones: the search is a button-sized icon that opens across the bar when tapped */
  @media (max-width: 40rem) {
    .staff-search { flex: 0 0 2.75rem; block-size: 2.75rem; padding: 0; justify-content: center; border-color: transparent; background: none; color: var(--text); }
    .staff-search > svg { pointer-events: none; }
    .staff-search .input { position: absolute; inset: 0; opacity: 0; cursor: pointer; }
    .staff-search:focus-within { position: absolute; inset-inline: var(--space-3); inset-block: .6rem; block-size: auto; z-index: 5; justify-content: flex-start;
                                 padding-inline: var(--space-3); background: var(--surface); border-color: var(--accent); }
    .staff-search:focus-within .input { position: static; opacity: 1; cursor: text; }
  }
  /* with the staff bar on screen, its "Menu" tab replaces the topbar's menu button */
  @media (max-width: 47.99rem) { .admin:has(.tabbar [data-side-toggle]) .topbar .nav-toggle { display: none; } }
}
@layer components {
  .choice-card-plain { grid-template-columns: auto 1fr; }
}
@layer components {
  /* Progress & access (a student's or a group's lessons, ticked to mark completed, open or close) */
  .check-line { display: flex; align-items: flex-start; gap: var(--space-2); cursor: pointer; }
  .check-line input { margin-block-start: .3em; inline-size: 1.1rem; block-size: 1.1rem; flex: none; }
  .check-line .muted { display: block; font-size: var(--step--1); }
  .progress-tools-head { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2) var(--space-4); }
  .progress-tools-head .check-line { flex: 1 1 14rem; }
  .progress-tools-list { list-style: none; padding: 0; display: grid; }
  .progress-tools-list li { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--space-1) var(--space-3);
                            padding-block: var(--space-2); border-block-start: 1px solid var(--line); }
  .progress-tools-state { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2); }
  .progress-tools-actions { border-color: var(--accent); }
}
@layer components {
  .answers-peek { margin-block-start: var(--space-1); font-size: var(--step--1); }
  .answers-peek > summary { cursor: pointer; color: var(--muted); }
  .answers-peek .kv { margin-block-start: var(--space-2); white-space: normal; }
  .kv.answers { grid-template-columns: minmax(0, 1fr); gap: 0; }
  .kv.answers dt { color: var(--muted); font-size: var(--step--1); }
  .kv.answers dd { white-space: pre-line; margin: 0 0 var(--space-3); }
  .reg-question[hidden] { display: none; }
}

/* --------------------------------------------------------------- help guides (/help and the staff guide) */
@layer components {
  .guide { display: grid; gap: var(--space-5); }
  .guide-toc { padding: var(--space-3) var(--space-4); }
  .guide-toc summary { cursor: pointer; }
  .guide-toc ol { margin-block-start: var(--space-3); padding-inline-start: 1.4em; columns: 2 16rem; column-gap: var(--space-5); }
  .guide-toc li { break-inside: avoid; padding-block: .15rem; }
  .guide-body { gap: var(--space-3); max-inline-size: calc(var(--measure) + 8rem); }
  .guide-body h2 { margin-block-start: var(--space-5); padding-block-start: var(--space-3); border-block-start: 1px solid var(--line); scroll-margin-block-start: 5rem; }
  .guide-body h2:first-child { margin-block-start: 0; border: 0; padding: 0; }
  .guide-body h3 { margin-block-start: var(--space-3); scroll-margin-block-start: 5rem; }
  .guide-body :is(ul, ol) { padding-inline-start: 1.4em; display: grid; gap: var(--space-1); }
  .guide-body li > :is(ul, ol) { margin-block-start: var(--space-1); }
  .guide-body blockquote { margin: 0; padding: var(--space-3) var(--space-4); border-inline-start: 3px solid var(--accent);
                           background: var(--accent-soft); border-radius: var(--radius-sm); }
  .guide-body blockquote p { margin: 0; }
  .guide-body code { font-size: .9em; padding: .1em .35em; border-radius: var(--radius-sm); background: color-mix(in srgb, var(--text) 8%, transparent); word-break: break-word; }
  .guide-body .table-wrap { margin-block: var(--space-2); }
  .guide-body .table :is(th, td) { text-align: start; vertical-align: top; white-space: normal; min-inline-size: 9rem; }
  .guide-body td code { white-space: normal; }
  @media print {
    .guide-toc { display: none; }
    .guide-body h2 { break-after: avoid; }
  }
}

@layer components {
  .reason-menu > summary.btn { border-radius: var(--radius-sm); padding-inline: var(--space-4); }
  .reason-panel { min-inline-size: min(22rem, 85vw); padding: var(--space-3); }
  .reason-panel textarea.input { min-block-size: 5rem; }
}