/* ============ tokens ============ */
:root {
  --bg: #faf7f2;
  --bg-2: #f2ece3;
  --surface: #ffffff;
  --surface-2: #fdfaf5;
  --border: #ebe3d7;
  --border-strong: #d8cbb9;
  --text: #232221;
  --text-2: #5d5750;
  --text-3: #938a7f;
  --primary: #2f2e2d;
  --primary-2: #454341;
  --primary-soft: color-mix(in srgb, var(--brand) 15%, #fff);
  --primary-ink: #ffffff;
  --brand: #fca942;
  --brand-2: #f28c1c;
  --brand-text: color-mix(in srgb, var(--brand-2) 68%, #000);
  --success: #0f9d6b;
  --success-soft: #e3f7ef;
  --danger: #dc3a4a;
  --danger-soft: #fdecee;
  --warn: #c7820a;
  --warn-soft: #fff4dc;
  --shadow-sm: 0 1px 2px rgba(28, 26, 46, .06), 0 1px 1px rgba(28, 26, 46, .04);
  --shadow: 0 8px 24px -8px rgba(60, 40, 15, .16), 0 2px 6px rgba(40, 30, 20, .05);
  --shadow-lg: 0 24px 60px -16px rgba(60, 40, 15, .28);
  --radius: 16px;
  --radius-sm: 10px;
  --font: "IBM Plex Sans Arabic", "Segoe UI", Tahoma, system-ui, sans-serif;
  --font-en: "Inter", "Segoe UI", system-ui, sans-serif;
  --reader-size: 17px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #131211; --bg-2: #1d1b19; --surface: #1c1a18; --surface-2: #23211e; --border: #322e2a; --border-strong: #48423b;
    --text: #f3eee8; --text-2: #beb5a9; --text-3: #8b8378; --primary: var(--brand); --primary-2: color-mix(in srgb, var(--brand) 80%, #fff); --primary-soft: color-mix(in srgb, var(--brand) 20%, #1c1a18); --primary-ink: #1c1712; --brand-text: color-mix(in srgb, var(--brand) 72%, #fff);
    --success: #3ccf95; --success-soft: #11322a; --danger: #ff6b7a; --danger-soft: #3a1820; --warn: #f2b544; --warn-soft: #3a2c10;
    --shadow-sm: 0 1px 2px rgba(0,0,0,.4); --shadow: 0 8px 24px -8px rgba(0,0,0,.6); --shadow-lg: 0 24px 60px -16px rgba(0,0,0,.7);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #131211; --bg-2: #1d1b19; --surface: #1c1a18; --surface-2: #23211e; --border: #322e2a; --border-strong: #48423b;
  --text: #f3eee8; --text-2: #beb5a9; --text-3: #8b8378; --primary: var(--brand); --primary-2: color-mix(in srgb, var(--brand) 80%, #fff); --primary-soft: color-mix(in srgb, var(--brand) 20%, #1c1a18); --primary-ink: #1c1712; --brand-text: color-mix(in srgb, var(--brand) 72%, #fff);
  --success: #3ccf95; --success-soft: #11322a; --danger: #ff6b7a; --danger-soft: #3a1820; --warn: #f2b544; --warn-soft: #3a2c10;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.4); --shadow: 0 8px 24px -8px rgba(0,0,0,.6); --shadow-lg: 0 24px 60px -16px rgba(0,0,0,.7);
  color-scheme: dark;
}

/* Accent themes (the color picker next to the dark-mode toggle). Only the two brand colors change. */
:root[data-accent="emerald"] { --brand: #34d399; --brand-2: #10b981; }
:root[data-accent="violet"]  { --brand: #a78bfa; --brand-2: #8b5cf6; }
:root[data-accent="rose"]    { --brand: #f472b6; --brand-2: #e0458f; }
:root[data-accent="ocean"]   { --brand: #60a5fa; --brand-2: #3b82f6; }
:root[data-accent="coffee"]  { --brand: #d4a373; --brand-2: #b07d4f; }
:root[data-accent="teal"]    { --brand: #2dd4bf; --brand-2: #0d9488; }

/* ============ base ============ */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; font-family: var(--font); background: var(--bg); color: var(--text);
  font-size: 15.5px; line-height: 1.7; -webkit-font-smoothing: antialiased; min-height: 100dvh;
}
h1, h2, h3, h4 { line-height: 1.35; margin: 0 0 .5em; font-weight: 700; }
h1 { font-size: clamp(1.4rem, 3vw, 1.85rem); }
h2 { font-size: 1.25rem; }
h3 { font-size: 1.05rem; }
p { margin: 0 0 .8em; }
a { color: var(--brand-text); text-decoration: none; }
.logo-d { display: none !important; }
:root[data-theme="dark"] .logo-l { display: none !important; }
:root[data-theme="dark"] .logo-d { display: block !important; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .logo-l { display: none !important; }
  :root:not([data-theme="light"]) .logo-d { display: block !important; }
}
button, input, select, textarea { font: inherit; color: inherit; }
[dir="ltr"], .en { font-family: var(--font-en); }
.muted { color: var(--text-2); }
.faint { color: var(--text-3); font-size: .88em; }
.hidden { display: none !important; }
:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; border-radius: 6px; }
::selection { background: color-mix(in srgb, var(--brand) 35%, transparent); }

.boot { display: grid; place-items: center; min-height: 100dvh; }
.spinner { width: 34px; height: 34px; border-radius: 50%; border: 3px solid var(--border); border-top-color: var(--primary); animation: spin .8s linear infinite; }
.spinner.sm { width: 18px; height: 18px; border-width: 2px; display: inline-block; vertical-align: middle; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ============ buttons & inputs ============ */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5em; border: 1px solid transparent;
  background: var(--primary); color: var(--primary-ink); padding: .62em 1.15em; border-radius: 12px; font-weight: 600;
  cursor: pointer; transition: transform .12s, background .15s, box-shadow .15s, opacity .15s; white-space: nowrap; min-height: 42px;
  box-shadow: 0 6px 16px -8px color-mix(in srgb, var(--primary) 70%, transparent);
}
.btn:hover { background: var(--primary-2); }
.btn:active { transform: translateY(1px) scale(.99); }
.btn:disabled { opacity: .55; cursor: not-allowed; }
.btn.ghost { background: transparent; color: var(--text); border-color: var(--border-strong); box-shadow: none; }
.btn.ghost:hover { background: var(--surface-2); }
.btn.soft { background: var(--primary-soft); color: var(--primary); box-shadow: none; }
.btn.soft:hover { background: color-mix(in srgb, var(--primary-soft) 70%, var(--primary) 12%); }
.btn.danger { background: var(--danger-soft); color: var(--danger); box-shadow: none; }
.btn.sm { padding: .38em .8em; min-height: 34px; font-size: .9em; border-radius: 10px; }
.btn.block { width: 100%; }
.icon-btn { background: none; border: 0; padding: 8px; border-radius: 10px; cursor: pointer; color: var(--text-2); display: inline-grid; place-items: center; }
.icon-btn:hover { background: var(--bg-2); color: var(--text); }
.icon { width: 20px; height: 20px; flex: none; }

label.field { display: block; margin-bottom: 14px; }
label.field > span { display: block; font-weight: 600; font-size: .92em; margin-bottom: 6px; color: var(--text-2); }
.input, textarea.input, select.input {
  width: 100%; padding: .7em .9em; background: var(--surface); border: 1.5px solid var(--border); border-radius: 12px;
  transition: border-color .15s, box-shadow .15s; outline: none; min-height: 44px;
}
.input:focus { border-color: var(--brand); box-shadow: 0 0 0 4px color-mix(in srgb, var(--brand) 22%, transparent); }
textarea.input { resize: vertical; min-height: 120px; line-height: 1.6; }

.chip { display: inline-flex; align-items: center; gap: .35em; padding: .15em .7em; border-radius: 99px; font-size: .8em; font-weight: 600; background: var(--bg-2); color: var(--text-2); }
.chip.easy { background: var(--success-soft); color: var(--success); }
.chip.medium { background: var(--warn-soft); color: var(--warn); }
.chip.hard { background: var(--danger-soft); color: var(--danger); }
.chip.primary { background: var(--primary-soft); color: var(--primary); }

.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow-sm); }
.card + .card { margin-top: 14px; }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.row.between { justify-content: space-between; }
.grow { flex: 1; min-width: 0; }
.stack > * + * { margin-top: 14px; }
.grid { display: grid; gap: 14px; }
.grid.cols-2 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.grid.cols-3 { grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); }
.grid.stats { grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); }

/* ============ auth ============ */
.auth { min-height: 100dvh; display: grid; grid-template-columns: 1.1fr 1fr; }
.auth-hero {
  position: relative; overflow: hidden; color: #fff; padding: 56px; display: flex; flex-direction: column; justify-content: space-between;
  background: radial-gradient(900px 480px at 110% -10%, color-mix(in srgb, var(--brand) 55%, transparent) 0%, transparent 60%), radial-gradient(700px 480px at -20% 110%, rgba(235, 211, 190, .3) 0%, transparent 55%), linear-gradient(150deg, #2f2e2d, #1c1b1a);
}
.auth-hero h1 { font-size: clamp(2rem, 4vw, 3rem); margin-bottom: .3em; }
.auth-hero p { font-size: 1.1rem; opacity: .88; max-width: 34ch; }
.auth-hero ul { list-style: none; padding: 0; margin: 28px 0 0; display: grid; gap: 12px; }
.auth-hero li { display: flex; gap: 12px; align-items: center; background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.16); padding: 12px 16px; border-radius: 14px; backdrop-filter: blur(6px); max-width: 420px; }
.auth-hero li .icon { width: 22px; height: 22px; }
.auth-form { display: grid; place-items: center; padding: 32px 20px; }
.auth-form .card { width: 100%; max-width: 420px; padding: 32px; box-shadow: var(--shadow); }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.25rem; }
.brand-mark { width: 40px; height: 40px; display: grid; place-items: center; flex: none; }
.brand-mark img { width: 40px; height: auto; }
.auth-logo { width: 150px; height: auto; }
.form-logo { display: block; width: 96px; height: auto; margin: 0 auto 14px; }
.tabs-2 { display: grid; grid-template-columns: 1fr 1fr; background: var(--bg-2); padding: 4px; border-radius: 12px; margin: 18px 0 22px; }
.tabs-2 button { border: 0; background: none; padding: .55em; border-radius: 9px; cursor: pointer; font-weight: 600; color: var(--text-2); }
.tabs-2 button.on { background: var(--surface); color: var(--text); box-shadow: var(--shadow-sm); }
.form-error { color: var(--danger); background: var(--danger-soft); padding: .6em .9em; border-radius: 10px; font-size: .92em; margin-bottom: 12px; }
@media (max-width: 860px) {
  .auth { grid-template-columns: 1fr; }
  .auth-hero { padding: 28px 20px 36px; }
  .auth-hero ul { display: none; }
  .auth-form { padding: 0 16px 32px; margin-top: -20px; }
}

/* ============ app shell ============ */
.shell { display: grid; grid-template-columns: 264px 1fr; min-height: 100dvh; }
.shell > div { min-width: 0; }
html, body { overflow-x: clip; }
.sidebar {
  position: sticky; top: 0; height: 100dvh; overflow-y: auto; background: var(--surface); border-inline-start: 0; border-inline-end: 1px solid var(--border);
  padding: 20px 14px; display: flex; flex-direction: column; gap: 6px;
}
.sidebar .brand { padding: 4px 8px 16px; }
.nav-link { display: flex; align-items: center; gap: 12px; padding: 10px 12px; border-radius: 12px; color: var(--text-2); font-weight: 500; }
.nav-link:hover { background: var(--bg-2); color: var(--text); }
.nav-link.on { background: var(--primary-soft); color: var(--primary); font-weight: 600; }
.nav-title { font-size: .78em; color: var(--text-3); font-weight: 600; margin: 16px 12px 4px; letter-spacing: .02em; }
.nav-course { display: flex; align-items: center; gap: 10px; padding: 8px 12px; border-radius: 10px; color: var(--text-2); font-size: .94em; }
.nav-course:hover { background: var(--bg-2); color: var(--text); }
.nav-course.on { background: var(--bg-2); color: var(--text); font-weight: 600; }
.dot { width: 10px; height: 10px; border-radius: 4px; flex: none; }
.sidebar-foot { margin-top: auto; padding-top: 14px; border-top: 1px solid var(--border); display: flex; align-items: center; gap: 10px; }
.avatar { width: 36px; height: 36px; border-radius: 50%; background: var(--primary-soft); color: var(--primary); display: grid; place-items: center; font-weight: 700; flex: none; }
.main { min-width: 0; padding: 28px clamp(16px, 3vw, 40px) 60px; max-width: 1180px; width: 100%; margin: 0 auto; }
.topbar { display: none; }
.bottom-nav { display: none; }

@media (max-width: 900px) {
  .shell { grid-template-columns: 1fr; }
  .sidebar { display: none; }
  .topbar {
    display: flex; position: sticky; top: 0; z-index: 20; align-items: center; justify-content: space-between; gap: 10px;
    padding: 10px 16px; padding-top: max(10px, env(safe-area-inset-top)); background: color-mix(in srgb, var(--bg) 85%, transparent);
    backdrop-filter: blur(12px); border-bottom: 1px solid var(--border);
  }
  .topbar .brand { font-size: 1.08rem; }
  .topbar .brand-mark { width: 32px; height: 32px; border-radius: 10px; }
  .main { padding: 18px 16px calc(96px + env(safe-area-inset-bottom)); }
  .bottom-nav {
    display: grid; grid-template-columns: repeat(4, 1fr); position: fixed; bottom: 0; inset-inline: 0; z-index: 30;
    background: color-mix(in srgb, var(--surface) 92%, transparent); backdrop-filter: blur(14px); border-top: 1px solid var(--border);
    padding: 6px 6px calc(6px + env(safe-area-inset-bottom));
  }
  .bottom-nav a { display: flex; flex-direction: column; align-items: center; gap: 2px; font-size: .72rem; color: var(--text-3); padding: 6px 0; border-radius: 12px; font-weight: 500; }
  .bottom-nav a.on { color: var(--text); font-weight: 600; }
  .bottom-nav a.on .icon { color: var(--brand-2); }
  .bottom-nav a.fab .icon { background: var(--primary); color: var(--primary-ink); border-radius: 12px; padding: 5px; width: 32px; height: 32px; box-shadow: var(--shadow); }
}

/* ============ page header ============ */
.page-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-bottom: 22px; }
.page-head h1 { margin: 0; }
.crumbs { color: var(--text-3); font-size: .9em; margin-bottom: 4px; display: flex; gap: 6px; align-items: center; }
.crumbs a { color: var(--text-3); }
.crumbs a:hover { color: var(--primary); }

/* ============ dashboard ============ */
.hello { position: relative; overflow: hidden; border-radius: 22px; padding: 26px; margin-bottom: 20px; color: #fff; background: radial-gradient(600px 260px at 0% 0%, color-mix(in srgb, var(--brand) 70%, transparent), transparent 65%), linear-gradient(120deg, #2f2e2d, #3b342c); box-shadow: var(--shadow); }
.hello h1 { color: #fff; margin-bottom: 4px; }
.hello p { opacity: .9; margin: 0; }
.hello::after { content: ""; position: absolute; inset-inline-start: -40px; bottom: -90px; width: 220px; height: 220px; border-radius: 50%; background: rgba(235, 211, 190, .12); }
.stat { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; }
.stat b { display: block; font-size: 1.6rem; line-height: 1.2; }
.stat span { color: var(--text-2); font-size: .88em; }
.course-card { position: relative; display: flex; flex-direction: column; gap: 12px; background: var(--surface); border: 1px solid var(--border); border-radius: 18px; padding: 18px; color: var(--text); transition: transform .15s, box-shadow .15s, border-color .15s; overflow: hidden; }
.course-card:hover { transform: translateY(-2px); box-shadow: var(--shadow); border-color: var(--border-strong); }
.course-card::before { content: ""; position: absolute; inset-block-start: 0; inset-inline: 0; height: 5px; background: var(--c); }
.course-card h3 { margin: 0; font-size: 1.08rem; }
.course-icon { width: 44px; height: 44px; border-radius: 13px; display: grid; place-items: center; background: color-mix(in srgb, var(--c) 16%, transparent); color: var(--c); font-weight: 700; font-family: var(--font-en); font-size: .85rem; }
.progress { height: 8px; background: var(--bg-2); border-radius: 99px; overflow: hidden; }
.progress > i { display: block; height: 100%; background: linear-gradient(90deg, var(--brand-2), var(--brand)); border-radius: inherit; transition: width .4s; }
.progress.green > i { background: linear-gradient(90deg, #0f9d6b, #3ccf95); }
.mini-bars { display: grid; gap: 8px; font-size: .82em; color: var(--text-2); }
.mini-bars div { display: grid; grid-template-columns: 64px 1fr 34px; gap: 8px; align-items: center; }
.add-card { display: grid; place-items: center; text-align: center; gap: 8px; border: 2px dashed var(--border-strong); border-radius: 18px; padding: 24px; color: var(--text-2); min-height: 180px; transition: border-color .15s, background .15s; }
.add-card:hover { border-color: var(--brand); background: var(--primary-soft); color: var(--text); }
.empty { text-align: center; padding: 48px 20px; color: var(--text-2); }
.empty .icon { width: 56px; height: 56px; color: var(--text-3); margin-bottom: 10px; }

/* ============ upload ============ */
.drop { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 4px; min-height: 190px; border: 2px dashed var(--border-strong); border-radius: 18px; padding: 36px 20px; text-align: center; cursor: pointer; transition: all .15s; background: var(--surface-2); }
.drop:hover, .drop.over { border-color: var(--brand); background: var(--primary-soft); }
.drop .icon { width: 44px; height: 44px; color: var(--brand-2); margin-bottom: 4px; }
.drop h3 { margin: 4px 0 0; }
.drop input { display: none; }
.file-pill { display: flex; align-items: center; gap: 12px; padding: 12px 14px; border-radius: 12px; background: var(--primary-soft); color: var(--primary); font-weight: 600; margin-top: 12px; }
.colors { display: flex; gap: 8px; flex-wrap: wrap; }
.colors label { cursor: pointer; }
.colors input { position: absolute; opacity: 0; pointer-events: none; }
.colors span { display: block; width: 32px; height: 32px; border-radius: 10px; background: var(--c); border: 3px solid transparent; box-shadow: inset 0 0 0 2px rgba(255,255,255,.4); }
.colors input:checked + span { border-color: var(--text); }
.colors input:focus-visible + span { outline: 2px solid var(--primary); outline-offset: 2px; }

/* ============ course page ============ */
.course-hero { display: flex; gap: 16px; align-items: center; margin-bottom: 18px; flex-wrap: wrap; }
.course-hero .course-icon { width: 56px; height: 56px; font-size: 1rem; border-radius: 16px; }
@media (max-width: 600px) { .course-hero { gap: 12px; } .course-hero > .grow { min-width: calc(100% - 72px); } .course-hero > .row { width: 100%; justify-content: flex-start; } }
.tabs { display: flex; gap: 4px; overflow-x: auto; scrollbar-width: none; border-bottom: 1px solid var(--border); margin-bottom: 22px; position: sticky; top: 0; z-index: 10; background: var(--bg); }
@media (max-width: 900px) { .tabs { top: 57px; margin-inline: -16px; padding-inline: 16px; } }
.tabs::-webkit-scrollbar { display: none; }
.tabs a { display: flex; align-items: center; gap: 8px; padding: 12px 14px; color: var(--text-2); font-weight: 500; border-bottom: 2.5px solid transparent; white-space: nowrap; margin-bottom: -1px; }
.tabs a:hover { color: var(--text); }
.tabs a.on { color: var(--text); border-bottom-color: var(--brand); font-weight: 600; }
.tabs .icon { width: 18px; height: 18px; }
.job { display: flex; gap: 14px; align-items: center; padding: 14px 16px; border-radius: 14px; background: var(--primary-soft); color: var(--primary); margin-bottom: 18px; }
.job.failed { background: var(--danger-soft); color: var(--danger); }
.job .grow .progress { margin-top: 8px; background: color-mix(in srgb, var(--brand) 22%, transparent); }
.action-tile { display: flex; gap: 14px; align-items: flex-start; }
.action-tile .tile-icon { width: 46px; height: 46px; border-radius: 14px; display: grid; place-items: center; flex: none; }
.tile-icon.a { background: color-mix(in srgb, #3b6fe8 15%, transparent); color: #3b6fe8; }
.tile-icon.b { background: color-mix(in srgb, #12a36f 15%, transparent); color: #12a36f; }
.tile-icon.c { background: color-mix(in srgb, #dd7a0b 15%, transparent); color: #dd7a0b; }
.tile-icon.d { background: color-mix(in srgb, #9a4fe0 15%, transparent); color: #9a4fe0; }

.big-idea { display: flex; gap: 14px; padding: 14px 0; border-bottom: 1px solid var(--border); }
.big-idea:last-child { border-bottom: 0; }
.big-idea .num { width: 30px; height: 30px; border-radius: 10px; flex: none; display: grid; place-items: center; background: var(--primary-soft); color: var(--primary); font-weight: 700; font-size: .9em; }
.steps { counter-reset: s; list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.steps li { counter-increment: s; display: flex; gap: 12px; }
.steps li::before { content: counter(s); width: 26px; height: 26px; border-radius: 50%; flex: none; display: grid; place-items: center; background: var(--success-soft); color: var(--success); font-weight: 700; font-size: .85em; }

.section-list { display: grid; gap: 10px; }
.section-item { display: flex; align-items: center; gap: 14px; padding: 14px 16px; background: var(--surface); border: 1px solid var(--border); border-radius: 14px; color: var(--text); transition: border-color .15s, box-shadow .15s; }
.section-item:hover { border-color: var(--brand); box-shadow: var(--shadow-sm); }
.section-item .idx { font-family: var(--font-en); font-weight: 600; color: var(--text-3); width: 28px; text-align: center; }
.badges { display: flex; gap: 6px; flex-wrap: wrap; }
.badge-ok { color: var(--success); background: var(--success-soft); }

/* ============ reader ============ */
.reader-bar { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin-bottom: 16px; }
.seg { display: inline-flex; background: var(--bg-2); padding: 4px; border-radius: 12px; overflow-x: auto; max-width: 100%; scrollbar-width: none; }
.seg button { border: 0; background: none; padding: .45em .95em; border-radius: 9px; cursor: pointer; font-weight: 600; color: var(--text-2); white-space: nowrap; font-size: .92em; }
.seg button.on { background: var(--surface); color: var(--text); box-shadow: var(--shadow-sm); }
.prose { font-size: var(--reader-size); line-height: 1.95; }
.prose h1, .prose h2, .prose h3 { margin-top: 1.2em; }
.prose h2 { font-size: 1.25em; } .prose h3 { font-size: 1.1em; }
.prose table { width: 100%; border-collapse: collapse; margin: 1em 0; font-size: .92em; display: block; overflow-x: auto; }
.prose th, .prose td { border: 1px solid var(--border); padding: 8px 10px; text-align: start; }
.prose th { background: var(--bg-2); }
.prose code { background: var(--bg-2); padding: .1em .4em; border-radius: 6px; font-size: .9em; direction: ltr; unicode-bidi: embed; }
.prose pre { background: var(--bg-2); padding: 14px; border-radius: 12px; overflow-x: auto; direction: ltr; }
.prose blockquote { margin: 1em 0; padding: .4em 1em; border-inline-start: 4px solid var(--brand); background: var(--surface-2); border-radius: 8px; }
.prose strong { color: var(--text); background: linear-gradient(transparent 62%, color-mix(in srgb, var(--brand) 30%, transparent) 0); }
.prose ul, .prose ol { padding-inline-start: 1.4em; }
.prose.en { direction: ltr; text-align: left; font-size: calc(var(--reader-size) - 1px); line-height: 1.8; white-space: pre-wrap; }
.pg { display: inline-flex; align-items: center; gap: 4px; margin: 1em 0 .4em; font-size: 12px; font-weight: 600; color: var(--text-3); background: var(--bg-2); border-radius: 99px; padding: 2px 10px; font-family: var(--font); direction: rtl; white-space: nowrap; }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 0; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; background: var(--surface); }
.split-row { display: contents; }
.split-row > div { padding: 16px 20px; border-bottom: 1px solid var(--border); }
.split-row > div:first-child { border-inline-end: 1px solid var(--border); }
.split-row > .orig { background: var(--surface-2); }
@media (max-width: 760px) { .split { grid-template-columns: 1fr; } .split-row > div:first-child { border-inline-end: 0; } }
.pager { display: flex; justify-content: space-between; gap: 10px; margin-top: 22px; }
.cursor::after { content: "▍"; animation: blink 1s steps(2) infinite; color: var(--brand); }
@keyframes blink { 50% { opacity: 0; } }

.idea { border: 1px solid var(--border); border-radius: 14px; padding: 16px; background: var(--surface); }
.idea + .idea { margin-top: 12px; }
.idea h4 { margin: 0 0 6px; display: flex; gap: 8px; align-items: baseline; justify-content: space-between; }
.idea .ex { margin-top: 8px; padding: 10px 12px; border-radius: 10px; background: var(--warn-soft); font-size: .94em; }
.term-table { width: 100%; border-collapse: collapse; }
.term-table td, .term-table th { padding: 10px 12px; border-bottom: 1px solid var(--border); text-align: start; vertical-align: top; }
.term-table th { font-size: .85em; color: var(--text-3); font-weight: 600; }
.term-table .en { font-weight: 600; direction: ltr; text-align: left; }
@media (max-width: 640px) {
  .term-table thead { display: none; }
  .term-table tr { display: block; padding: 10px 0; border-bottom: 1px solid var(--border); }
  .term-table td { display: block; border: 0; padding: 2px 0; }
  .term-table .en { text-align: start; }
}

/* ============ quiz ============ */
.quiz-top { position: sticky; top: 0; z-index: 12; background: color-mix(in srgb, var(--bg) 90%, transparent); backdrop-filter: blur(10px); padding: 12px 0; margin-bottom: 8px; }
@media (max-width: 900px) { .quiz-top { top: 57px; } }
.timer { font-family: var(--font-en); font-weight: 600; padding: .3em .8em; border-radius: 10px; background: var(--bg-2); }
.timer.low { background: var(--danger-soft); color: var(--danger); }
.q-card { background: var(--surface); border: 1px solid var(--border); border-radius: 18px; padding: 20px; scroll-margin-top: 140px; }
.q-card + .q-card { margin-top: 14px; }
.q-head { display: flex; gap: 10px; align-items: center; margin-bottom: 10px; flex-wrap: wrap; }
.q-num { font-weight: 700; color: var(--text-3); }
.q-text { font-size: 1.08rem; font-weight: 600; margin-bottom: 14px; white-space: pre-line; }
.opts { display: grid; gap: 10px; }
.opt { display: flex; align-items: center; gap: 12px; padding: 12px 14px; border: 1.5px solid var(--border); border-radius: 13px; cursor: pointer; transition: all .12s; background: var(--surface); min-height: 50px; }
.opt:hover { border-color: var(--border-strong); background: var(--surface-2); }
.opt input { position: absolute; opacity: 0; pointer-events: none; }
.opt .mark { width: 28px; height: 28px; border-radius: 9px; border: 1.5px solid var(--border-strong); display: grid; place-items: center; font-weight: 700; font-size: .85em; color: var(--text-2); flex: none; font-family: var(--font-en); }
.opt:has(input:checked) { border-color: var(--brand-2); background: var(--primary-soft); }
.opt:has(input:checked) .mark { background: var(--brand); color: #1c1712; border-color: var(--brand); }
.opt:has(input:focus-visible) { outline: 2px solid var(--primary); outline-offset: 2px; }
.opt.correct { border-color: var(--success); background: var(--success-soft); }
.opt.correct .mark { background: var(--success); border-color: var(--success); color: #fff; }
.opt.wrong { border-color: var(--danger); background: var(--danger-soft); }
.opt.wrong .mark { background: var(--danger); border-color: var(--danger); color: #fff; }
.opt.locked { cursor: default; }
.q-dots { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 10px; }
.q-dots a { width: 30px; height: 30px; border-radius: 9px; display: grid; place-items: center; font-size: .8em; font-weight: 600; background: var(--bg-2); color: var(--text-3); font-family: var(--font-en); }
.q-dots a.done { background: var(--primary-soft); color: var(--primary); }
.q-dots a.ok { background: var(--success-soft); color: var(--success); }
.q-dots a.bad { background: var(--danger-soft); color: var(--danger); }
.q-dots a.half { background: var(--warn-soft); color: var(--warn); }
.feedback { margin-top: 14px; border-radius: 14px; padding: 14px 16px; background: var(--surface-2); border: 1px solid var(--border); }
.feedback.ok { border-color: color-mix(in srgb, var(--success) 40%, transparent); background: var(--success-soft); }
.feedback.bad { border-color: color-mix(in srgb, var(--danger) 35%, transparent); background: var(--danger-soft); }
.feedback.half { border-color: color-mix(in srgb, var(--warn) 40%, transparent); background: var(--warn-soft); }
.feedback h4 { margin: 0 0 6px; }
.ref { margin-top: 10px; padding: 10px 12px; border-radius: 10px; background: var(--surface); border: 1px dashed var(--border-strong); font-size: .92em; }
.ref q { display: block; direction: ltr; text-align: left; font-family: var(--font-en); font-style: italic; color: var(--text-2); margin-top: 4px; quotes: "“" "”"; }
.score-ring { --p: 0; width: 150px; height: 150px; border-radius: 50%; display: grid; place-items: center; background: conic-gradient(var(--ring, var(--primary)) calc(var(--p) * 1%), var(--bg-2) 0); flex: none; }
.score-ring > div { width: 118px; height: 118px; border-radius: 50%; background: var(--surface); display: grid; place-items: center; text-align: center; line-height: 1.2; }
.score-ring b { font-size: 2rem; font-family: var(--font-en); }
.result-head { display: flex; gap: 24px; align-items: center; flex-wrap: wrap; justify-content: center; }
.result-head > .grow { min-width: min(100%, 280px); }
.topic-row { display: grid; grid-template-columns: minmax(90px, 1.2fr) 2fr 44px; gap: 10px; align-items: center; padding: 6px 0; font-size: .94em; }
.checks { display: flex; gap: 8px; flex-wrap: wrap; }
.check { display: inline-flex; align-items: center; gap: 8px; padding: 8px 12px; border: 1.5px solid var(--border); border-radius: 12px; cursor: pointer; user-select: none; }
.check:has(input:checked) { border-color: var(--brand-2); background: var(--primary-soft); color: var(--text); font-weight: 600; }
.check input { accent-color: var(--brand-2); }
.sec-pick { max-height: 280px; overflow: auto; border: 1px solid var(--border); border-radius: 12px; padding: 6px; }
.sec-pick label { display: flex; gap: 10px; align-items: center; padding: 8px 10px; border-radius: 8px; cursor: pointer; }
.sec-pick label:hover { background: var(--bg-2); }
.sec-pick input { accent-color: var(--brand-2); width: 18px; height: 18px; }
.history-item { display: flex; align-items: center; gap: 12px; padding: 12px 0; border-bottom: 1px solid var(--border); color: var(--text); }
.history-item:last-child { border-bottom: 0; }
.pct { font-family: var(--font-en); font-weight: 700; padding: .2em .6em; border-radius: 8px; }
.pct.good { background: var(--success-soft); color: var(--success); }
.pct.mid { background: var(--warn-soft); color: var(--warn); }
.pct.low { background: var(--danger-soft); color: var(--danger); }

/* ============ flashcards ============ */
.flash-wrap { perspective: 1400px; max-width: 560px; margin: 0 auto; }
.flash { position: relative; height: 300px; transform-style: preserve-3d; transition: transform .55s cubic-bezier(.2,.8,.2,1); cursor: pointer; }
.flash.flipped { transform: rotateY(180deg); }
.flash > div { position: absolute; inset: 0; backface-visibility: hidden; border-radius: 22px; padding: 28px; display: grid; place-items: center; text-align: center; font-size: 1.15rem; box-shadow: var(--shadow); border: 1px solid var(--border); overflow: auto; }
.flash .front { background: var(--surface); font-weight: 600; }
.flash .back { background: linear-gradient(160deg, var(--primary-soft), var(--surface)); border-color: var(--brand); transform: rotateY(180deg); }
.flash .hint { position: absolute; bottom: 14px; inset-inline: 0; text-align: center; font-size: .78rem; color: var(--text-3); font-weight: 400; }
.flash-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; max-width: 560px; margin: 18px auto 0; }

/* ============ chat ============ */
.chat { display: flex; flex-direction: column; gap: 14px; min-height: 50vh; }
.msg { max-width: 88%; padding: 12px 16px; border-radius: 18px; }
.msg.user { align-self: flex-start; background: var(--primary); color: var(--primary-ink); border-end-start-radius: 6px; }
.msg.assistant { align-self: flex-end; background: var(--surface); border: 1px solid var(--border); border-end-end-radius: 6px; width: 88%; }
.msg.assistant .prose { font-size: 15.5px; line-height: 1.85; }
.msg .prose > :last-child { margin-bottom: 0; }
.chat-input { position: sticky; bottom: 0; padding: 14px 0 6px; background: linear-gradient(transparent, var(--bg) 30%); display: flex; gap: 10px; align-items: flex-end; }
@media (max-width: 900px) { .chat-input { bottom: calc(70px + env(safe-area-inset-bottom)); } }
.chat-input textarea { min-height: 50px; max-height: 160px; resize: none; }
.suggest { display: flex; gap: 8px; flex-wrap: wrap; }
.suggest button { border: 1px solid var(--border); background: var(--surface); border-radius: 99px; padding: .45em 1em; cursor: pointer; font-size: .9em; color: var(--text-2); }
.suggest button:hover { border-color: var(--brand); color: var(--text); }

/* ============ toasts & modal ============ */
#toasts { position: fixed; bottom: 24px; inset-inline-start: 50%; transform: translateX(50%); z-index: 100; display: grid; gap: 8px; width: min(92vw, 420px); }
@media (max-width: 900px) { #toasts { bottom: calc(84px + env(safe-area-inset-bottom)); } }
.toast { background: var(--text); color: var(--bg); padding: 12px 16px; border-radius: 14px; box-shadow: var(--shadow-lg); animation: pop .25s ease; font-weight: 500; }
.toast.error { background: var(--danger); color: #fff; }
.toast.ok { background: var(--success); color: #fff; }
@keyframes pop { from { transform: translateY(10px); opacity: 0; } }
dialog#modal { border: 0; padding: 0; border-radius: 22px; background: var(--surface); color: var(--text); width: min(94vw, 480px); box-shadow: var(--shadow-lg); }
dialog#modal::backdrop { background: rgba(10, 8, 30, .45); backdrop-filter: blur(3px); }
.modal-body { padding: 24px; }
.modal-actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 18px; flex-wrap: wrap; }
.code-box { font-family: var(--font-en); font-size: 2rem; font-weight: 700; letter-spacing: .2em; text-align: center; padding: 16px; border-radius: 14px; background: var(--primary-soft); color: var(--text); border: 2px dashed var(--brand); direction: ltr; }

.skeleton { background: linear-gradient(90deg, var(--bg-2), var(--surface-2), var(--bg-2)); background-size: 200% 100%; animation: sh 1.2s infinite; border-radius: 10px; height: 16px; margin-bottom: 10px; }
@keyframes sh { to { background-position: -200% 0; } }
.fade-in { animation: fade .25s ease; }
@keyframes fade { from { opacity: 0; transform: translateY(4px); } }

@media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation: none !important; transition: none !important; } }

/* ============ print (summaries / translations) ============ */
@media print {
  .sidebar, .topbar, .bottom-nav, .tabs, .reader-bar, .pager, .no-print, #toasts { display: none !important; }
  .shell { display: block; }
  .main { padding: 0; max-width: none; }
  body { background: #fff; color: #000; }
  .card, .idea { box-shadow: none; break-inside: avoid; }
}

/* ============ subscription (preview) ============ */
.paywall {
  min-height: 100dvh; display: grid; place-items: center; padding: 32px 16px calc(32px + env(safe-area-inset-bottom));
  background: radial-gradient(700px 360px at 50% -10%, color-mix(in srgb, var(--brand) 22%, transparent), transparent 70%), var(--bg);
}
.paywall-inner { width: 100%; max-width: 460px; text-align: center; }
.paywall-inner h1 { margin: 12px 0 4px; }
.preview-badge { margin-top: 4px; }
.plan-card {
  text-align: start; margin: 22px 0 14px; padding: 24px; border-radius: 22px; background: var(--surface);
  border: 2px solid var(--brand); box-shadow: var(--shadow-lg);
}
.plan-top { display: flex; justify-content: space-between; align-items: flex-start; gap: 10px; }
.plan-name { font-size: 1.1rem; }
.price { display: flex; align-items: baseline; gap: 6px; margin: 16px 0 6px; }
.price .amount { font-size: 2.8rem; font-weight: 700; line-height: 1; letter-spacing: -.02em; }
.price .cur { font-size: 1.2rem; font-weight: 700; }
.price .per { color: var(--text-2); }
.plan-features { list-style: none; padding: 0; margin: 16px 0 20px; display: grid; gap: 11px; }
.plan-features li { display: flex; gap: 10px; align-items: center; }
.feat-ic { width: 30px; height: 30px; border-radius: 9px; display: grid; place-items: center; flex: none; background: var(--primary-soft); color: var(--brand-2); }
.feat-ic .icon { width: 17px; height: 17px; }
.btn.lg { min-height: 52px; font-size: 1.05rem; border-radius: 14px; }
.pay-methods { display: flex; flex-wrap: wrap; justify-content: center; gap: 6px; margin-top: 14px; }
.pay-methods span { font-size: .78rem; font-weight: 600; padding: .25em .7em; border-radius: 8px; border: 1px solid var(--border-strong); color: var(--text-2); font-family: var(--font-en); }

/* ============ accent picker ============ */
.swatches { display: grid; grid-template-columns: repeat(auto-fill, minmax(96px, 1fr)); gap: 10px; }
.swatch {
  display: flex; flex-direction: column; align-items: center; gap: 8px; padding: 12px 8px; border-radius: 14px; cursor: pointer;
  background: var(--surface-2); border: 2px solid var(--border); font-weight: 600; font-size: .88em; color: var(--text-2); transition: border-color .15s, transform .12s;
}
.swatch:hover { transform: translateY(-1px); border-color: var(--border-strong); }
.swatch[aria-pressed="true"] { border-color: var(--sw); color: var(--text); }
.swatch i { width: 38px; height: 38px; border-radius: 50%; display: grid; place-items: center; color: #1c1712;
  background: linear-gradient(135deg, var(--sw), var(--sw2)); box-shadow: 0 4px 12px -4px var(--sw); }
.swatch i .icon { width: 18px; height: 18px; opacity: 0; }
.swatch[aria-pressed="true"] i .icon { opacity: 1; }
.palette-dot { width: 20px; height: 20px; border-radius: 50%; background: conic-gradient(#fca942 0 60deg, #34d399 0 120deg, #2dd4bf 0 180deg, #60a5fa 0 240deg, #a78bfa 0 300deg, #f472b6 0); }