/* ============ IELTS practice – design tokens ============ */
:root {
  --bg: #f5f6fb;
  --surface: #ffffff;
  --surface-2: #f8f9fd;
  --soft: #eef0fd;
  --soft-2: #e4e7fb;
  --border: #e3e6f0;
  --border-strong: #cfd4e6;
  --text: #141828;
  --text-2: #4b5168;
  --muted: #7a809a;
  --primary: #4f46e5;
  --primary-2: #4338ca;
  --primary-soft: #e8e7fd;
  --primary-ink: #3730a3;
  --green: #22a35a;
  --green-soft: #e3f6ea;
  --red: #e0475b;
  --red-soft: #fde8eb;
  --amber: #e8a317;
  --amber-soft: #fdf3dc;
  --orange: #c2611f;
  --violet: #7c5cf0;
  --teal: #0f9a8a;
  --c-listening: #e05267;
  --c-reading: #7c5cf0;
  --c-writing: #22a35a;
  --c-speaking: #e8a317;
  --shadow: 0 1px 2px rgba(20, 24, 40, .04), 0 4px 16px rgba(20, 24, 40, .05);
  --shadow-lg: 0 10px 40px rgba(20, 24, 40, .14);
  --radius: 16px;
  --radius-sm: 10px;
  --font: 'Be Vietnam Pro', 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, Arial, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, 'Cascadia Mono', Consolas, monospace;
  --reading-size: 16px;
  color-scheme: light;
}
:root[data-theme="dark"] {
  --bg: #0f1220;
  --surface: #171b2e;
  --surface-2: #1c2136;
  --soft: #232a4a;
  --soft-2: #2b3358;
  --border: #2a3050;
  --border-strong: #3a4268;
  --text: #eef0fa;
  --text-2: #c2c7de;
  --muted: #8f96b5;
  --primary: #7b74ff;
  --primary-2: #6c63ff;
  --primary-soft: #2a2b5c;
  --primary-ink: #c9c6ff;
  --green-soft: #183a29;
  --red-soft: #45202a;
  --amber-soft: #3f321a;
  --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 4px 16px rgba(0, 0, 0, .25);
  color-scheme: dark;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body { font-family: var(--font); background: var(--bg); color: var(--text); font-size: 15px; line-height: 1.5; -webkit-font-smoothing: antialiased; }
a { color: var(--primary); text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }
h1, h2, h3, h4 { margin: 0; line-height: 1.25; letter-spacing: -.01em; }
h1 { font-size: 26px; font-weight: 800; }
h2 { font-size: 21px; font-weight: 800; }
h3 { font-size: 17px; font-weight: 700; }
h4 { font-size: 15px; font-weight: 700; }
p { margin: 0 0 .6em; }
.ic { flex-shrink: 0; vertical-align: middle; }
hr { border: 0; border-top: 1px solid var(--border); margin: 16px 0; }
::selection { background: #c7c4ff; }

/* ============ layout ============ */
.topbar { position: sticky; top: 0; z-index: 40; background: color-mix(in srgb, var(--surface) 88%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--border); }
.topbar-in { max-width: 1320px; margin: 0 auto; display: flex; align-items: center; gap: 18px; padding: 10px 24px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 17px; color: var(--text); white-space: nowrap; }
.brand-logo { width: 34px; height: 34px; border-radius: 10px; background: linear-gradient(135deg, var(--primary), #8b5cf6); color: #fff; display: grid; place-items: center; font-weight: 800; font-size: 14px; letter-spacing: -.02em; }
.nav { display: flex; gap: 2px; flex: 1; overflow-x: auto; scrollbar-width: none; }
.nav::-webkit-scrollbar { display: none; }
.nav a { display: flex; align-items: center; gap: 7px; padding: 8px 12px; border-radius: 10px; color: var(--text-2); font-weight: 600; white-space: nowrap; font-size: 14.5px; }
.nav a:hover { background: var(--soft); color: var(--text); }
.nav a.active { background: var(--primary-soft); color: var(--primary-ink); }
.top-right { display: flex; align-items: center; gap: 8px; }
.pill-stat { display: flex; align-items: center; gap: 5px; padding: 6px 10px; border-radius: 999px; background: var(--surface-2); border: 1px solid var(--border); font-weight: 700; font-size: 13.5px; white-space: nowrap; }
.pill-stat .ic { color: var(--orange); }
.icon-btn { width: 36px; height: 36px; border-radius: 10px; border: 1px solid var(--border); background: var(--surface); display: inline-grid; place-items: center; cursor: pointer; color: var(--text-2); padding: 0; }
.icon-btn:hover { background: var(--soft); color: var(--text); }
.icon-btn.round { border-radius: 999px; width: 44px; height: 44px; }
.page { max-width: 1320px; margin: 0 auto; padding: 26px 24px 80px; }
.page.narrow { max-width: 980px; }
.page-head { display: flex; align-items: center; gap: 14px; margin-bottom: 20px; flex-wrap: wrap; }
.page-head .grow { flex: 1; }
.sub { color: var(--muted); font-size: 14px; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.xs { font-size: 12px; }
.bold { font-weight: 700; }
.row { display: flex; align-items: center; }
.col { display: flex; flex-direction: column; }
.wrap { flex-wrap: wrap; }
.grow { flex: 1; min-width: 0; }
.gap-1 { gap: 4px; } .gap-2 { gap: 8px; } .gap-3 { gap: 12px; } .gap-4 { gap: 16px; } .gap-6 { gap: 24px; }
.justify-end { justify-content: flex-end; } .between { justify-content: space-between; } .center { justify-content: center; } .items-start { align-items: flex-start; }
.mt-1 { margin-top: 4px; } .mt-2 { margin-top: 8px; } .mt-3 { margin-top: 12px; } .mt-4 { margin-top: 16px; } .mt-6 { margin-top: 24px; } .mt-8 { margin-top: 32px; }
.mb-1 { margin-bottom: 4px; } .mb-2 { margin-bottom: 8px; } .mb-3 { margin-bottom: 12px; } .mb-4 { margin-bottom: 16px; } .mb-6 { margin-bottom: 24px; }
.p-4 { padding: 16px; } .p-5 { padding: 20px; } .p-6 { padding: 24px; }
.grid { display: grid; gap: 18px; }
.g-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.g-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.g-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.dash-grid { display: grid; grid-template-columns: minmax(0, 1.65fr) minmax(0, 1fr); gap: 20px; align-items: start; }
.dash-grid > * { min-width: 0; }
.cont-grid { grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); }
.mine-grid { grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr); }
.hide { display: none !important; }
.nowrap { white-space: nowrap; }
.ellipsis { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ============ cards ============ */
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); }
.card.soft { background: var(--soft); border-color: var(--soft-2); box-shadow: none; }
.card.hl { border: 2px solid var(--primary); }
.card-title { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.stat { padding: 20px; text-align: center; }
.stat .num { font-size: 40px; font-weight: 800; letter-spacing: -.02em; line-height: 1.1; }
.stat .lbl { margin-top: 6px; font-size: 12.5px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--text-2); display: flex; align-items: center; justify-content: center; gap: 6px; }
.stat.left { text-align: left; }
.stat.left .lbl { justify-content: flex-start; }
.num.orange { color: var(--orange); } .num.primary { color: var(--primary); }
.icon-tile { width: 46px; height: 46px; border-radius: 12px; background: var(--primary-soft); color: var(--primary); display: grid; place-items: center; flex-shrink: 0; }
.icon-tile.lg { width: 60px; height: 60px; border-radius: 16px; }
.icon-tile.dark { background: #161a2c; color: #fff; }
:root[data-theme="dark"] .icon-tile.dark { background: #2d3458; }

/* ============ buttons ============ */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 10px 18px; border-radius: 12px; border: 1px solid var(--border-strong); background: var(--surface); font-weight: 700; cursor: pointer; color: var(--text); box-shadow: 0 3px 0 var(--border); transition: transform .06s, box-shadow .06s, background .15s; white-space: nowrap; font-size: 14.5px; line-height: 1.2; text-decoration: none; }
.btn:hover { background: var(--surface-2); }
.btn:active { transform: translateY(2px); box-shadow: 0 1px 0 var(--border); }
.btn:disabled, .btn.disabled { opacity: .5; cursor: not-allowed; pointer-events: none; }
.btn.primary { background: var(--primary); border-color: var(--primary-2); color: #fff; box-shadow: 0 3px 0 var(--primary-ink); }
.btn.primary:hover { background: var(--primary-2); }
.btn.soft { background: var(--primary-soft); border-color: transparent; color: var(--primary-ink); box-shadow: 0 3px 0 var(--soft-2); }
.btn.soft:hover { filter: brightness(.97); }
.btn.ghost { background: transparent; border-color: transparent; box-shadow: none; color: var(--text-2); }
.btn.ghost:hover { background: var(--soft); }
.btn.danger { color: var(--red); }
.btn.green { background: var(--green); color: #fff; border-color: #1b8a4b; box-shadow: 0 3px 0 #17773f; }
.btn.dark { background: #161a2c; color: #fff; border-color: #161a2c; box-shadow: 0 3px 0 #000; }
.btn.sm { padding: 7px 12px; font-size: 13.5px; border-radius: 10px; }
.btn.lg { padding: 13px 22px; font-size: 15.5px; }
.btn.block { width: 100%; }
.chip { display: inline-flex; align-items: center; gap: 6px; padding: 7px 14px; border-radius: 999px; border: 1px solid var(--border); background: var(--surface); font-weight: 600; cursor: pointer; font-size: 14px; color: var(--text-2); white-space: nowrap; }
.chip:hover { background: var(--soft); }
.chip.active { background: var(--primary-soft); color: var(--primary-ink); border-color: transparent; }
.chip .cnt { font-weight: 700; color: var(--muted); font-size: 12.5px; }
.chip.active .cnt { color: var(--primary-ink); }
.seg { display: inline-flex; border: 1px solid var(--border); border-radius: 14px; padding: 4px; background: var(--surface); gap: 2px; flex-wrap: wrap; }
.seg button { border: 0; background: transparent; padding: 8px 14px; border-radius: 10px; font-weight: 700; cursor: pointer; color: var(--text-2); display: inline-flex; align-items: center; gap: 6px; }
.seg button.active { background: var(--primary-soft); color: var(--primary-ink); }
.seg button .cnt { font-weight: 600; color: var(--muted); font-size: 12.5px; }
.badge { display: inline-flex; align-items: center; gap: 5px; padding: 3px 9px; border-radius: 8px; font-size: 12px; font-weight: 700; background: var(--soft); color: var(--text-2); white-space: nowrap; }
.badge.green { background: var(--green-soft); color: var(--green); }
.badge.red { background: var(--red-soft); color: var(--red); }
.badge.amber { background: var(--amber-soft); color: #9a6a06; }
.badge.primary { background: var(--primary-soft); color: var(--primary-ink); }
.badge.new { background: var(--primary); color: #fff; }
.badge.skill { text-transform: uppercase; letter-spacing: .06em; padding: 4px 10px; }
.badge.listening { background: #fde9ec; color: var(--c-listening); }
.badge.reading { background: #efeafe; color: var(--c-reading); }
.badge.writing { background: var(--green-soft); color: var(--c-writing); }
.badge.speaking { background: var(--amber-soft); color: #a8740a; }
:root[data-theme="dark"] .badge.listening { background: #46202a; }
:root[data-theme="dark"] .badge.reading { background: #2e2557; }
.band-pill { min-width: 46px; text-align: center; padding: 4px 10px; border-radius: 10px; background: var(--primary-soft); color: var(--primary-ink); font-weight: 800; font-size: 14px; }

/* ============ tabs ============ */
.tabs { display: flex; gap: 6px; border-bottom: 1px solid var(--border); margin-bottom: 22px; overflow-x: auto; scrollbar-width: thin; }
.tabs a, .tabs button { display: inline-flex; align-items: center; gap: 8px; padding: 12px 16px; font-weight: 700; color: var(--text-2); border: 0; background: none; cursor: pointer; border-bottom: 3px solid transparent; margin-bottom: -1px; white-space: nowrap; font-size: 15.5px; }
.tabs a:hover, .tabs button:hover { color: var(--text); }
.tabs .active { color: var(--primary); border-bottom-color: var(--primary); }
.tabs .active.t-listening { color: var(--teal); border-bottom-color: var(--teal); }
.tabs .cnt { font-size: 12.5px; background: var(--soft); padding: 2px 8px; border-radius: 999px; color: var(--text-2); }
.tabs .active .cnt { background: var(--primary-soft); color: var(--primary-ink); }

/* ============ forms ============ */
.input, select.input, textarea.input { width: 100%; padding: 10px 12px; border-radius: 10px; border: 1px solid var(--border-strong); background: var(--surface); outline: none; transition: border .15s, box-shadow .15s; }
.input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-soft); }
textarea.input { resize: vertical; min-height: 90px; line-height: 1.6; }
label.field { display: block; margin-bottom: 14px; }
label.field > span { display: block; font-weight: 700; font-size: 13.5px; margin-bottom: 6px; color: var(--text-2); }
.switch { display: inline-flex; align-items: center; gap: 8px; cursor: pointer; font-weight: 600; }
.switch input { width: 18px; height: 18px; accent-color: var(--primary); }

/* ============ progress ============ */
.bar { height: 8px; border-radius: 99px; background: var(--soft-2); overflow: hidden; display: flex; }
.bar > i { display: block; height: 100%; }
.bar .g { background: var(--green); } .bar .p { background: var(--primary); } .bar .a { background: var(--amber); } .bar .r { background: var(--red); }
.legend { display: flex; gap: 14px; flex-wrap: wrap; font-size: 13.5px; font-weight: 600; color: var(--text-2); margin-top: 10px; }
.legend i { display: inline-block; width: 9px; height: 9px; border-radius: 50%; margin-right: 5px; }
.ring { position: relative; width: 92px; height: 92px; }
.ring svg { transform: rotate(-90deg); }
.ring .lbl { position: absolute; inset: 0; display: grid; place-items: center; text-align: center; font-weight: 800; font-size: 20px; line-height: 1.1; }
.ring .lbl small { display: block; font-size: 12px; color: var(--muted); font-weight: 600; }

/* ============ dashboard ============ */
.hello { display: flex; align-items: center; gap: 14px; margin-bottom: 18px; }
.hello .avatar { width: 52px; height: 52px; border-radius: 16px; background: linear-gradient(135deg, #ffb36b, #ff7a59); display: grid; place-items: center; color: #fff; font-weight: 800; font-size: 22px; }
.plan-item { display: flex; align-items: center; gap: 14px; padding: 16px 18px; border-radius: 14px; border: 1px solid var(--border); background: var(--surface); margin-top: 12px; }
.plan-item.done { background: var(--surface-2); }
.plan-item.done .t { text-decoration: line-through; color: var(--muted); }
.plan-item.featured { border: 2px solid var(--primary); background: var(--soft); }
.plan-ico { width: 44px; height: 44px; border-radius: 50%; display: grid; place-items: center; font-weight: 800; flex-shrink: 0; }
.plan-ico.L { background: #fde9ec; color: var(--c-listening); } .plan-ico.R { background: #efeafe; color: var(--c-reading); }
.plan-ico.W { background: var(--green-soft); color: var(--c-writing); } .plan-ico.S { background: var(--amber-soft); color: #a8740a; }
.plan-ico.V { background: var(--primary-soft); color: var(--primary); } .plan-ico.ok { background: var(--green-soft); color: var(--green); }
.callout { border-left: 4px solid var(--primary); background: var(--soft); padding: 12px 16px; border-radius: 10px; color: var(--text-2); }
.section-label { font-size: 12.5px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; color: var(--primary); margin: 18px 0 4px; }
.skill-row { display: grid; grid-template-columns: 110px 1fr 56px; align-items: center; gap: 10px; padding: 10px 0; }
.skill-row .nm { display: flex; align-items: center; gap: 8px; font-weight: 700; }
.skill-row .nm i { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }
.skill-row .val { text-align: right; font-weight: 800; font-size: 19px; line-height: 1.1; }
.skill-row .delta { font-size: 12.5px; font-weight: 700; }
.delta.up { color: var(--green); } .delta.down { color: var(--red); } .delta.flat { color: var(--muted); }
.spark { width: 100%; height: 62px; }
.mastery-row { display: flex; align-items: center; gap: 10px; padding: 8px 0; border-bottom: 1px dashed var(--border); font-size: 14px; }
.mastery-row:last-child { border-bottom: 0; }
.heat { display: grid; grid-template-columns: repeat(14, 1fr); gap: 4px; }
.heat i { aspect-ratio: 1; border-radius: 4px; background: var(--soft-2); display: block; }
.heat i.l1 { background: #c9c5fb; } .heat i.l2 { background: #9c94f8; } .heat i.l3 { background: var(--primary); } .heat i.today { outline: 2px solid var(--amber); }

/* ============ practice library ============ */
.test-card { padding: 20px; display: flex; flex-direction: column; gap: 10px; border-color: #d4eedd; }
.test-card.reading { border-color: #e2dbfb; } .test-card.writing { border-color: #cfeedc; } .test-card.speaking { border-color: #f6e6bf; }
.test-card.listening { border-color: #cfe9e4; }
:root[data-theme="dark"] .test-card { border-color: var(--border); }
.test-card .grp { font-size: 13px; font-weight: 800; letter-spacing: .06em; text-transform: uppercase; color: var(--text-2); }
.test-card .ttl { font-size: 20px; font-weight: 800; margin-top: -6px; }
.test-card .meta { display: flex; gap: 14px; flex-wrap: wrap; color: var(--text-2); font-size: 14px; }
.test-card .meta span { display: inline-flex; align-items: center; gap: 5px; }
.test-card .prog { border: 1px solid var(--border); border-radius: 12px; padding: 10px 14px; font-size: 13.5px; color: var(--text-2); background: var(--surface-2); }
.test-card .prog b { color: var(--text); }
.test-card .actions { display: flex; gap: 10px; margin-top: auto; padding-top: 4px; }
.test-card .actions .btn:first-child { flex: 1; }
.skill-badge-row { display: flex; align-items: center; justify-content: space-between; }
.continue-card { display: flex; align-items: center; gap: 16px; padding: 18px 22px; }
.continue-card .play { width: 54px; height: 54px; border-radius: 50%; background: var(--primary); color: #fff; display: grid; place-items: center; flex-shrink: 0; border: 0; cursor: pointer; }
.empty { text-align: center; padding: 50px 20px; color: var(--muted); }
.empty .icon-tile { margin: 0 auto 12px; }

/* ============ runners (common) ============ */
body.runner-mode .topbar { display: none; }
.runner { height: 100vh; display: flex; flex-direction: column; background: var(--bg); }
.runner-top { display: flex; align-items: center; gap: 12px; padding: 10px 18px; background: var(--surface); border-bottom: 1px solid var(--border); flex-wrap: wrap; }
.runner-top .ttl { font-weight: 800; font-size: 16px; }
.timer { display: inline-flex; align-items: center; gap: 6px; font-weight: 800; font-variant-numeric: tabular-nums; font-size: 17px; padding: 6px 14px; border-radius: 10px; background: var(--soft); color: var(--primary-ink); }
.timer.warn { background: var(--amber-soft); color: #9a6a06; }
.timer.danger { background: var(--red-soft); color: var(--red); animation: pulse 1s infinite; }
@keyframes pulse { 50% { opacity: .6; } }
.runner-body { flex: 1; display: flex; min-height: 0; }
.pane { overflow: auto; min-width: 0; }
.pane.left { flex: 1 1 52%; }
.pane.right { flex: 1 1 48%; background: var(--surface); border-left: 1px solid var(--border); }
.splitter { width: 8px; cursor: col-resize; background: var(--border); flex-shrink: 0; position: relative; }
.splitter::after { content: ''; position: absolute; left: 2px; top: 50%; width: 4px; height: 40px; margin-top: -20px; background: var(--border-strong); border-radius: 4px; }
.splitter:hover, .splitter.drag { background: var(--primary-soft); }
.pdf-frame { width: 100%; height: 100%; border: 0; display: block; background: #525659; }
.pdf-missing { padding: 40px; text-align: center; }
.palette { display: flex; align-items: center; gap: 10px; padding: 8px 14px; background: var(--surface); border-top: 1px solid var(--border); overflow-x: auto; }
.palette .part-lbl { font-weight: 800; font-size: 13px; white-space: nowrap; color: var(--text-2); padding: 0 4px; cursor: pointer; }
.palette .part-lbl.active { color: var(--primary); }
.qnum { min-width: 30px; height: 30px; border-radius: 8px; border: 1px solid var(--border-strong); background: var(--surface); font-weight: 700; font-size: 13px; cursor: pointer; padding: 0 4px; position: relative; flex-shrink: 0; }
.qnum.answered { background: var(--primary-soft); border-color: var(--primary); color: var(--primary-ink); }
.qnum.current { outline: 2px solid var(--primary); outline-offset: 1px; }
.qnum.flagged::after { content: ''; position: absolute; top: -4px; right: -4px; width: 9px; height: 9px; border-radius: 50%; background: var(--amber); border: 2px solid var(--surface); }
.qnum.ok { background: var(--green-soft); border-color: var(--green); color: var(--green); }
.qnum.bad { background: var(--red-soft); border-color: var(--red); color: var(--red); }
.parts-sep { width: 1px; height: 24px; background: var(--border); flex-shrink: 0; }

/* answer sheet (cambridge) */
.sheet { padding: 18px 22px 60px; }
.sheet-part { margin-bottom: 22px; }
.sheet-part h4 { display: flex; align-items: center; gap: 8px; margin-bottom: 10px; }
.sheet-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px 16px; }
.ans-row { display: flex; align-items: center; gap: 8px; }
.ans-row .n { width: 30px; height: 30px; border-radius: 8px; background: var(--soft); display: grid; place-items: center; font-weight: 800; font-size: 13px; flex-shrink: 0; }
.ans-row input { flex: 1; min-width: 0; padding: 7px 10px; border-radius: 9px; border: 1px solid var(--border-strong); background: var(--surface); outline: none; }
.ans-row input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-soft); }
.ans-row .flag { border: 0; background: none; color: var(--border-strong); cursor: pointer; padding: 4px; }
.ans-row .flag.on { color: var(--amber); }
.ans-row.ok input { border-color: var(--green); background: var(--green-soft); }
.ans-row.bad input { border-color: var(--red); background: var(--red-soft); }
.audio-box { padding: 14px 22px; border-bottom: 1px solid var(--border); background: var(--surface-2); }
.audio-box audio { width: 100%; height: 40px; }
.track-tabs { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 10px; }

/* interactive reading/listening */
.passage { padding: 26px 34px 80px; font-size: var(--reading-size); line-height: 1.75; max-width: 900px; }
.passage h2 { margin-bottom: 6px; }
.passage .intro { color: var(--muted); font-size: 14px; margin-bottom: 18px; font-style: italic; }
.passage p { margin: 0 0 1em; }
.passage .plabel { font-weight: 800; color: var(--primary); margin-right: 8px; }
mark.hl { background: #fff1a8; color: inherit; border-radius: 3px; padding: 0 1px; cursor: pointer; }
:root[data-theme="dark"] mark.hl { background: #6b5a12; }
mark.hl.note { background: #c8f0d6; }
.qpane { padding: 22px 26px 100px; font-size: var(--reading-size); }
.qgroup { margin-bottom: 28px; }
.qgroup .qhead { font-weight: 800; margin-bottom: 4px; }
.qgroup .instr { color: var(--text-2); margin-bottom: 12px; font-size: .94em; background: var(--surface-2); border: 1px solid var(--border); padding: 10px 14px; border-radius: 10px; }
.q { margin: 0 0 14px; padding: 12px 14px; border-radius: 12px; border: 1px solid transparent; scroll-margin-top: 90px; }
.q.current { border-color: var(--primary-soft); background: color-mix(in srgb, var(--primary-soft) 35%, transparent); }
.q .qn { display: inline-grid; place-items: center; min-width: 28px; height: 28px; border-radius: 8px; background: var(--primary); color: #fff; font-weight: 800; font-size: 13px; margin-right: 8px; padding: 0 6px; }
.q .qt { font-weight: 600; }
.opts { display: flex; flex-direction: column; gap: 6px; margin-top: 10px; }
.opt { display: flex; align-items: flex-start; gap: 10px; padding: 9px 12px; border-radius: 10px; border: 1px solid var(--border); cursor: pointer; background: var(--surface); }
.opt:hover { border-color: var(--primary); }
.opt input { margin-top: 4px; accent-color: var(--primary); }
.opt .lt { font-weight: 800; color: var(--primary); width: 16px; }
.opt.sel { border-color: var(--primary); background: var(--primary-soft); }
.opt.ok { border-color: var(--green); background: var(--green-soft); }
.opt.bad { border-color: var(--red); background: var(--red-soft); }
.tf-row { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 8px; }
.tf-row button { padding: 6px 12px; border-radius: 9px; border: 1px solid var(--border-strong); background: var(--surface); font-weight: 700; cursor: pointer; font-size: 13.5px; }
.tf-row button.sel { background: var(--primary); color: #fff; border-color: var(--primary); }
.tf-row button.ok { background: var(--green); color: #fff; border-color: var(--green); }
.tf-row button.bad { background: var(--red); color: #fff; border-color: var(--red); }
.gapbox { line-height: 2.2; background: var(--surface-2); border: 1px solid var(--border); padding: 14px 18px; border-radius: 12px; }
.gapbox h4 { margin: 2px 0 6px; }
.gapbox .gtitle { font-weight: 800; text-align: center; margin-bottom: 6px; }
.gapbox ul { margin: 0; padding-left: 20px; }
.gapbox table { border-collapse: collapse; width: 100%; margin: 8px 0; font-size: .95em; line-height: 1.6; }
.gapbox td, .gapbox th { border: 1px solid var(--border-strong); padding: 6px 8px; vertical-align: top; }
.gapbox th { background: var(--soft); }
.gap-in { display: inline-flex; align-items: center; gap: 4px; vertical-align: middle; }
.gap-in b { font-size: 12px; background: var(--primary); color: #fff; border-radius: 6px; padding: 1px 6px; }
.gap-in input { width: 150px; height: 30px; line-height: normal; padding: 4px 8px; border-radius: 8px; border: 1px solid var(--border-strong); background: var(--surface); outline: none; font-size: .95em; }
.gap-in input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-soft); }
.gap-in.ok input { border-color: var(--green); background: var(--green-soft); }
.gap-in.bad input { border-color: var(--red); background: var(--red-soft); }
.match-opts { border: 1px solid var(--border); border-radius: 12px; padding: 10px 14px; margin-bottom: 12px; background: var(--surface-2); font-size: .95em; }
.match-opts .mo { display: flex; gap: 10px; padding: 3px 0; }
.match-opts .mo b { min-width: 28px; color: var(--primary); }
.match-row { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; flex-wrap: wrap; }
.match-row select { padding: 6px 10px; border-radius: 9px; border: 1px solid var(--border-strong); background: var(--surface); min-width: 110px; font-weight: 700; }
.match-row select.ok { border-color: var(--green); background: var(--green-soft); }
.match-row select.bad { border-color: var(--red); background: var(--red-soft); }
.expl { margin-top: 8px; padding: 10px 12px; border-radius: 10px; background: var(--amber-soft); font-size: .9em; color: var(--text); }
.expl .ka { font-weight: 800; color: var(--green); }
.listen-player { padding: 16px 22px; border-bottom: 1px solid var(--border); background: var(--surface-2); display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.listen-player .wave { flex: 1; min-width: 140px; height: 8px; border-radius: 99px; background: var(--soft-2); overflow: hidden; }
.listen-player .wave i { display: block; height: 100%; background: var(--primary); width: 0; transition: width .3s; }
.script { padding: 18px 26px; }
.script .ln { padding: 6px 10px; border-radius: 8px; }
.script .ln.now { background: var(--primary-soft); }
.script .sp { font-weight: 800; color: var(--primary); margin-right: 6px; }

/* ============ results ============ */
.result-hero { display: grid; grid-template-columns: auto 1fr; gap: 26px; align-items: center; padding: 26px; }
.big-band { width: 130px; height: 130px; border-radius: 30px; background: linear-gradient(135deg, var(--primary), #8b5cf6); color: #fff; display: grid; place-items: center; text-align: center; }
.big-band b { font-size: 44px; line-height: 1; display: block; }
.big-band span { font-size: 12px; letter-spacing: .1em; text-transform: uppercase; opacity: .85; }
.rtable { width: 100%; border-collapse: collapse; font-size: 14px; }
.rtable th { text-align: left; font-size: 12px; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); padding: 8px 10px; border-bottom: 1px solid var(--border); }
.rtable td { padding: 9px 10px; border-bottom: 1px solid var(--border); vertical-align: top; }
.rtable tr:last-child td { border-bottom: 0; }
.rtable .ok { color: var(--green); font-weight: 700; } .rtable .bad { color: var(--red); font-weight: 700; }
.tbl-wrap { overflow-x: auto; }

/* ============ vocab ============ */
.topic-card { padding: 22px; display: flex; flex-direction: column; gap: 6px; }
.topic-card .top { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 10px; }
.topic-card h3 { font-size: 19px; }
.topic-card .desc { color: var(--text-2); font-size: 14px; margin-bottom: 10px; }
.topic-card .actions { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 14px; }
.review-banner { padding: 0; }
.review-banner .top { display: flex; align-items: center; gap: 14px; padding: 18px 22px; border-bottom: 1px solid var(--border); }
.review-banner .bot { display: flex; align-items: center; gap: 10px; padding: 14px 22px; flex-wrap: wrap; }
.review-banner .bot .lbl { font-size: 12.5px; font-weight: 800; letter-spacing: .08em; color: var(--text-2); text-transform: uppercase; margin-right: 6px; }
.num-chip { padding: 7px 14px; border-radius: 10px; background: var(--surface-2); border: 1px solid var(--border); font-weight: 700; cursor: pointer; }
.num-chip.active { background: var(--primary-soft); color: var(--primary-ink); border-color: transparent; }
.phrase-row { display: grid; grid-template-columns: 1fr auto; gap: 12px; padding: 14px 18px; border-bottom: 1px solid var(--border); align-items: center; }
.phrase-row:last-child { border-bottom: 0; }
.phrase-row .ph { font-weight: 800; font-size: 16px; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.phrase-row .vi { color: var(--text-2); }
.phrase-row .ex { color: var(--muted); font-size: 13.5px; font-style: italic; margin-top: 2px; }
.dot { width: 9px; height: 9px; border-radius: 50%; display: inline-block; }
.dot.mastered { background: var(--green); } .dot.learning { background: var(--primary); } .dot.new { background: var(--border-strong); }
.flash-wrap { max-width: 720px; margin: 0 auto; }
.flash { min-height: 320px; padding: 34px; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; gap: 12px; }
.flash .front { font-size: 30px; font-weight: 800; letter-spacing: -.01em; }
.flash .ipa { font-family: var(--mono); color: var(--muted); }
.flash .back { border-top: 1px dashed var(--border-strong); padding-top: 16px; margin-top: 8px; width: 100%; }
.flash .back .vi { font-size: 20px; font-weight: 700; color: var(--primary-ink); }
.flash .back .ex { color: var(--text-2); margin-top: 8px; font-style: italic; }
.grade-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-top: 18px; }
.grade-row .btn { flex-direction: column; gap: 2px; padding: 10px; }
.grade-row .btn small { font-weight: 600; opacity: .7; font-size: 12px; }
.g-again { color: var(--red) !important; } .g-hard { color: #a8740a !important; } .g-good { color: var(--green) !important; } .g-easy { color: var(--primary) !important; }
.cloze-in { font-size: 18px; padding: 10px 14px; text-align: center; max-width: 360px; }
.idea-q { padding: 18px 20px; }
.idea-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 12px; }
.idea-pt { padding: 10px 12px; border-radius: 10px; background: var(--surface-2); border: 1px solid var(--border); margin-bottom: 8px; font-size: 14px; }
.idea-pt b { display: block; }
.idea-pt .eg { color: var(--muted); font-style: italic; margin-top: 4px; }
.phrase-tag { display: inline-flex; align-items: center; gap: 6px; padding: 5px 10px; border-radius: 9px; border: 1px solid var(--border); background: var(--surface); font-size: 13.5px; margin: 0 6px 6px 0; cursor: pointer; }
.phrase-tag:hover { border-color: var(--primary); }

/* ============ shadowing ============ */
.sh-wrap { max-width: 1100px; margin: 0 auto; display: grid; grid-template-columns: minmax(0, 1fr) 70px; gap: 16px; }
.sh-hero { border-radius: 22px; min-height: 300px; background: radial-gradient(circle at 25% 30%, #3b3f78, #151832 60%); color: #fff; position: relative; overflow: hidden; display: flex; flex-direction: column; justify-content: space-between; padding: 22px 26px; }
.sh-hero .ttl { display: flex; align-items: center; gap: 12px; }
.sh-hero .ttl .lg { width: 52px; height: 52px; border-radius: 50%; background: #fff; color: var(--primary); display: grid; place-items: center; font-weight: 800; }
.sh-hero h2 { color: #fff; font-size: 24px; }
.sh-hero .bigplay { width: 84px; height: 84px; border-radius: 50%; background: rgba(0, 0, 0, .45); color: #fff; display: grid; place-items: center; border: 0; cursor: pointer; margin: 0 auto; }
.sh-hero .bigplay:hover { background: rgba(0, 0, 0, .6); }
.sh-hero .eq { display: flex; gap: 4px; align-items: flex-end; height: 34px; justify-content: center; }
.sh-hero .eq i { width: 5px; background: rgba(255, 255, 255, .55); border-radius: 3px; height: 6px; transition: height .15s; }
.sh-hero.playing .eq i { animation: eq 0.9s infinite ease-in-out; }
.sh-hero .eq i:nth-child(2n) { animation-delay: .2s !important; } .sh-hero .eq i:nth-child(3n) { animation-delay: .45s !important; }
@keyframes eq { 0%, 100% { height: 6px; } 50% { height: 32px; } }
.sh-progress { display: flex; align-items: center; gap: 14px; margin: 16px 0; color: var(--text-2); font-weight: 700; }
.sh-progress .bar { flex: 1; height: 5px; }
.sh-card { border: 2px solid var(--soft-2); background: var(--soft); border-radius: 18px; padding: 24px 30px; }
.sh-words { font-size: 30px; font-weight: 600; line-height: 1.55; letter-spacing: .005em; }
.sh-words .w { cursor: pointer; border-radius: 10px; padding: 0 3px; border: 2px solid transparent; }
.sh-words .w:hover { border-color: var(--text); }
.sh-words .w.now { background: var(--primary); color: #fff; }
.sh-words .w.good { color: var(--green); } .sh-words .w.miss { color: var(--red); text-decoration: underline wavy; }
.sh-ipa { font-family: var(--mono); color: var(--text-2); font-size: 19px; margin-top: 12px; line-height: 1.6; }
.sh-vi { font-size: 18px; color: var(--text-2); margin-top: 12px; }
.sh-other { padding: 14px 30px; color: var(--text-2); font-size: 22px; cursor: pointer; }
.sh-other:hover { color: var(--text); }
.sh-other .vi { font-size: 15px; color: var(--muted); }
.sh-controls { position: sticky; bottom: 18px; margin: 18px auto 0; max-width: 820px; background: var(--surface); border: 1px solid var(--border); border-radius: 22px; box-shadow: var(--shadow-lg); padding: 12px 26px; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; z-index: 5; }
.sh-controls .side { display: flex; flex-direction: column; align-items: center; gap: 2px; font-weight: 700; font-size: 13.5px; cursor: pointer; background: none; border: 0; color: var(--text); padding: 6px; border-radius: 12px; justify-self: center; }
.sh-controls .side:hover { background: var(--soft); }
.sh-controls .side.rec { color: var(--red); }
.sh-controls .mid { display: flex; align-items: center; gap: 18px; }
.sh-controls .mainplay { width: 70px; height: 70px; border-radius: 50%; background: #141828; color: #fff; display: grid; place-items: center; border: 0; cursor: pointer; }
:root[data-theme="dark"] .sh-controls .mainplay { background: var(--primary); }
.sh-controls .nav-btn { background: none; border: 0; cursor: pointer; color: var(--text); padding: 6px; }
.kbd-hint { text-align: center; font-size: 12.5px; color: var(--muted); margin-top: 8px; font-weight: 600; }
.sh-side { display: flex; flex-direction: column; align-items: center; gap: 12px; padding-top: 120px; position: sticky; top: 80px; height: fit-content; }
.sh-side .cnt { font-weight: 700; color: var(--text-2); font-size: 14px; }
.wpop { position: absolute; z-index: 60; width: 300px; background: var(--surface); border: 1px solid var(--border); border-radius: 16px; box-shadow: var(--shadow-lg); padding: 16px 18px; }
.wpop .w { font-size: 20px; font-weight: 800; }
.wpop .ipa { font-family: var(--mono); color: var(--text-2); margin: 4px 0; font-size: 16px; }
.wpop .mean { margin: 6px 0 12px; }
.wpop .mean .pos { color: var(--muted); }
.rec-result { margin-top: 12px; padding: 12px 16px; border-radius: 12px; background: var(--surface); border: 1px solid var(--border); font-size: 14.5px; }
.lvl-tag { display: inline-flex; padding: 2px 8px; border-radius: 6px; background: rgba(255, 255, 255, .15); font-size: 12px; font-weight: 700; }

/* ============ speaking ============ */
.cue { border: 2px dashed var(--border-strong); border-radius: 14px; padding: 18px 22px; background: var(--surface-2); }
.cue h3 { margin-bottom: 8px; }
.cue ul { margin: 6px 0 0; padding-left: 20px; }
.rec-panel { display: flex; flex-direction: column; align-items: center; gap: 12px; padding: 26px; }
.rec-btn { width: 86px; height: 86px; border-radius: 50%; border: 0; background: var(--red); color: #fff; display: grid; place-items: center; cursor: pointer; box-shadow: 0 6px 20px rgba(224, 71, 91, .35); }
.rec-btn.on { animation: recp 1.2s infinite; }
@keyframes recp { 0% { box-shadow: 0 0 0 0 rgba(224, 71, 91, .5); } 70% { box-shadow: 0 0 0 20px rgba(224, 71, 91, 0); } 100% { box-shadow: 0 0 0 0 rgba(224, 71, 91, 0); } }
.live-tx { min-height: 60px; width: 100%; padding: 12px 14px; border-radius: 12px; background: var(--surface-2); border: 1px solid var(--border); color: var(--text-2); font-size: 15px; }
.metric { padding: 14px; border-radius: 12px; background: var(--surface-2); border: 1px solid var(--border); text-align: center; }
.metric b { display: block; font-size: 22px; }
.metric span { font-size: 12.5px; color: var(--muted); font-weight: 600; }
.crit-row { display: grid; grid-template-columns: 1fr auto; gap: 10px; align-items: center; padding: 10px 0; border-bottom: 1px solid var(--border); }
.crit-row select { width: 90px; }

/* ============ writing ============ */
.write-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr); gap: 0; flex: 1; min-height: 0; }
.write-prompt { padding: 24px 28px; overflow: auto; border-right: 1px solid var(--border); }
.write-editor { display: flex; flex-direction: column; min-height: 0; background: var(--surface); }
.write-editor textarea { flex: 1; border: 0; outline: none; resize: none; padding: 24px 28px; font-size: 16.5px; line-height: 1.8; background: var(--surface); font-family: var(--font); }
.write-foot { display: flex; align-items: center; gap: 14px; padding: 10px 18px; border-top: 1px solid var(--border); flex-wrap: wrap; }
.wc { font-weight: 800; font-variant-numeric: tabular-nums; }
.wc.low { color: var(--red); } .wc.ok { color: var(--green); }
.chart-box { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 12px; margin: 14px 0; }
.chart-box svg { width: 100%; height: auto; display: block; }
.chart-box table { width: 100%; border-collapse: collapse; font-size: 14px; }
.chart-box th, .chart-box td { border: 1px solid var(--border-strong); padding: 6px 8px; text-align: center; }
.chart-box th { background: var(--soft); }
.analysis-list li { margin-bottom: 6px; }
.model-ans { white-space: pre-wrap; line-height: 1.75; background: var(--surface-2); border: 1px solid var(--border); padding: 16px 18px; border-radius: 12px; }
.ess-mark { background: #ffe1e1; border-radius: 3px; }
:root[data-theme="dark"] .ess-mark { background: #5a2530; }

/* ============ misc ============ */
#toasts { position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%); z-index: 100; display: flex; flex-direction: column; gap: 8px; align-items: center; pointer-events: none; }
.toast { background: #141828; color: #fff; padding: 10px 18px; border-radius: 12px; font-weight: 600; box-shadow: var(--shadow-lg); transition: opacity .4s, transform .4s; font-size: 14px; max-width: 90vw; }
.toast.ok { background: #177a43; } .toast.error { background: #b4283a; }
.toast.out { opacity: 0; transform: translateY(10px); }
.modal-wrap { position: fixed; inset: 0; background: rgba(15, 18, 32, .45); z-index: 80; display: grid; place-items: center; padding: 20px; animation: fade .15s; }
@keyframes fade { from { opacity: 0; } }
.modal { background: var(--surface); border-radius: 20px; box-shadow: var(--shadow-lg); width: min(720px, 100%); max-height: 90vh; overflow: auto; padding: 26px 28px; position: relative; }
.modal.sm { width: min(440px, 100%); }
.modal.lg { width: min(1000px, 100%); }
.modal-x { position: absolute; top: 14px; right: 14px; }
.kbd { font-family: var(--mono); font-size: 12px; padding: 1px 6px; border-radius: 6px; border: 1px solid var(--border-strong); background: var(--surface-2); }
.notice { padding: 12px 16px; border-radius: 12px; background: var(--amber-soft); color: var(--text); font-size: 14px; display: flex; gap: 10px; align-items: flex-start; }
.notice.info { background: var(--primary-soft); }
.notice.ok { background: var(--green-soft); }
.key-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 8px 14px; }
footer.site { text-align: center; color: var(--muted); font-size: 12.5px; padding: 20px; }
.loader { width: 22px; height: 22px; border: 3px solid var(--soft-2); border-top-color: var(--primary); border-radius: 50%; animation: spin 0.8s linear infinite; display: inline-block; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ============ responsive ============ */
@media (max-width: 1100px) {
  .g-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .g-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .dash-grid { grid-template-columns: minmax(0, 1fr); }
  .nav a span { display: none; }
  .nav a { padding: 9px 11px; }
}
@media (max-width: 760px) {
  body { font-size: 14.5px; }
  .page { padding: 18px 14px 80px; }
  .topbar-in { padding: 8px 12px; gap: 10px; }
  .brand span { display: none; }
  .pill-stat.hide-sm { display: none; }
  .g-2, .g-3, .g-4, .cont-grid, .mine-grid { grid-template-columns: minmax(0, 1fr); }
  .stats-4 { grid-template-columns: repeat(2, minmax(0, 1fr)) !important; gap: 10px; }
  .stat { padding: 14px 10px; }
  .stat .lbl { font-size: 11px; letter-spacing: .04em; }
  .continue-card { flex-wrap: wrap; }
  .runner-top { gap: 8px; padding: 8px 10px; }
  .runner-top .ttl { font-size: 14px; flex-basis: 40%; }
  .test-card .actions { flex-wrap: wrap; }
  .stat .num { font-size: 32px; }
  .runner-body { flex-direction: column; }
  .pane.left { flex: 0 0 48vh; }
  .pane.right { border-left: 0; border-top: 1px solid var(--border); }
  .splitter { display: none; }
  .sheet-grid { grid-template-columns: 1fr; }
  .write-grid { grid-template-columns: 1fr; overflow: auto; }
  .write-prompt { border-right: 0; border-bottom: 1px solid var(--border); }
  .sh-wrap { grid-template-columns: 1fr; }
  .sh-side { display: none; }
  .sh-words { font-size: 22px; }
  .sh-card { padding: 18px; }
  .sh-controls { padding: 10px 12px; }
  .idea-cols { grid-template-columns: 1fr; }
  .result-hero { grid-template-columns: 1fr; justify-items: center; text-align: center; }
  .key-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .passage { padding: 18px; }
  .qpane { padding: 16px; }
  h1 { font-size: 22px; }
}
@media print { .topbar, .palette, .runner-top { display: none; } }

/* ============ page-image viewer (Cambridge book pages) ============ */
.pv { display: flex; flex-direction: column; height: 100%; background: var(--surface); }
.pv.pv-fullscreen { position: fixed; inset: 0; z-index: 90; }
.pv-bar { display: flex; align-items: center; gap: 6px; padding: 8px 12px; border-bottom: 1px solid var(--border); background: var(--surface); overflow-x: auto; flex-shrink: 0; }
.pv-title { font-weight: 800; font-size: 14px; margin-right: 6px; white-space: nowrap; }
.pv-chip { padding: 4px 11px; font-size: 13px; }
.pv-count { white-space: nowrap; margin-right: 4px; font-weight: 600; }
.pv-zoom { display: inline-flex; align-items: center; border: 1px solid var(--border); border-radius: 10px; overflow: hidden; flex-shrink: 0; }
.pv-zoom .icon-btn { border: 0; border-radius: 0; width: 32px; height: 32px; font-weight: 800; font-size: 16px; }
.pv-zl { border: 0; background: var(--surface-2); height: 32px; min-width: 56px; font-weight: 700; font-size: 13px; cursor: pointer; color: var(--text-2); }
.pv-night.on { background: #1d2033; color: #ffd76a; }
.pv-body { flex: 1; min-height: 0; overflow: auto; background: #e8eaf2; padding: 14px; }
:root[data-theme="dark"] .pv-body { background: #0b0d18; }
.pv-pages { margin: 0 auto; }
.pv-page { margin: 0 0 14px; background: #fff; border-radius: 6px; box-shadow: 0 2px 10px rgba(20, 24, 40, .12); overflow: hidden; }
.pv-page img { display: block; width: 100%; height: auto; min-height: 120px; background: #fff; cursor: zoom-in; user-select: none; }
.pv-page figcaption { font-size: 12px; color: #6b7088; text-align: center; padding: 4px 0 6px; background: #f6f7fb; border-top: 1px solid #eceef5; }
.pv-body.night .pv-page img { filter: invert(.9) hue-rotate(180deg) contrast(.95); background: #000; }
.pv-body.night .pv-page, .pv-body.night .pv-page figcaption { background: #1b1d27; color: #a3a8bd; border-color: #2a2d3a; }
.pv-missing, .pv-empty { padding: 40px 20px; text-align: center; color: var(--muted); }
.pv-empty { margin: auto; }
.lb { position: fixed; inset: 0; z-index: 120; background: rgba(10, 12, 22, .92); display: flex; flex-direction: column; }
.lb-bar { display: flex; align-items: center; gap: 8px; padding: 10px 16px; color: #fff; font-weight: 700; }
.lb-bar .icon-btn { background: rgba(255, 255, 255, .1); border-color: transparent; color: #fff; }
.lb-body { flex: 1; overflow: auto; text-align: center; padding: 0 16px 16px; }
.lb-body img { max-width: none; width: min(1600px, 100%); background: #fff; border-radius: 4px; }
.cam-review { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr); gap: 18px; align-items: start; }
.cam-pages { position: sticky; top: 76px; height: calc(100vh - 96px); display: flex; flex-direction: column; overflow: hidden; padding: 0; }
.cam-pages .seg { margin: 10px 12px; align-self: flex-start; }
.cam-pv { flex: 1; min-height: 0; }
.cam-review .key-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.m-3 { margin: 12px; }
@media (max-width: 900px) {
  .cam-review { grid-template-columns: minmax(0, 1fr); }
  .cam-pages { position: static; height: 75vh; }
}

/* ============ Cambridge text view (from the Word files) ============ */
.ct-body { --ct-size: 17px; background: var(--surface-2); padding: 18px; }
.ct-doc { max-width: 900px; margin: 0 auto; }
.ct-page { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 22px 28px 10px; margin-bottom: 16px; font-size: var(--ct-size); line-height: 1.72; color: var(--text); box-shadow: var(--shadow); }
.ct-page p { margin: 0 0 .55em; }
.ct-page h3 { font-size: 1.12em; margin: .5em 0 .4em; letter-spacing: .02em; }
.ct-page h4 { font-size: 1em; margin: .7em 0 .35em; color: var(--primary-ink); }
.ct-page .ct-center { text-align: center; }
.ct-page .ct-right { text-align: right; }
.ct-pfoot { font-size: 12px; color: var(--muted); text-align: right; border-top: 1px dashed var(--border); margin-top: 10px; padding-top: 4px; }
.ct-tblwrap { overflow-x: auto; margin: .4em 0 .8em; }
.ct-table { border-collapse: collapse; width: 100%; font-size: .95em; }
.ct-table td { border: 1px solid var(--border-strong); padding: 6px 9px; vertical-align: top; }
.ct-table td p { margin: 0 0 .25em; }
.ct-table td.ct-vm { border-top-color: transparent; }
.ct-fig { max-width: 100%; height: auto; display: block; margin: 8px auto; background: #fff; border-radius: 6px; }
.ct-gap { display: inline-flex; align-items: center; gap: 4px; vertical-align: baseline; margin: 0 2px; }
.ct-gn { background: var(--primary); color: #fff; border-radius: 6px; padding: 0 6px; font-size: .78em; line-height: 1.6; }
.ct-in { width: 9em; padding: 2px 8px; border: 1px solid var(--border-strong); border-radius: 7px; background: var(--surface); font: inherit; font-size: .95em; outline: none; }
.ct-let .ct-in { width: 3.4em; text-align: center; font-weight: 700; text-transform: uppercase; }
.ct-in:focus { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-soft); }
.ct-in:disabled { opacity: .45; background: var(--surface-2); }
.ct-in.ok { border-color: var(--green); background: var(--green-soft); }
.ct-in.bad { border-color: var(--red); background: var(--red-soft); }
.ct-ans { color: var(--green); font-weight: 700; font-size: .85em; margin: 0 6px; }
.ct-q { scroll-margin-top: 100px; }
.ct-tf { display: inline-flex; gap: 4px; margin-left: 8px; vertical-align: middle; flex-wrap: wrap; }
.ct-tf button { font-size: .72em; font-weight: 800; padding: 2px 8px; border-radius: 7px; border: 1px solid var(--border-strong); background: var(--surface); cursor: pointer; color: var(--text-2); line-height: 1.7; }
.ct-tf button.sel { background: var(--primary); border-color: var(--primary); color: #fff; }
.ct-tf.ok button.sel { background: var(--green); border-color: var(--green); }
.ct-tf.bad button.sel { background: var(--red); border-color: var(--red); }
.ct-opt.clickable { cursor: pointer; border-radius: 8px; padding: 1px 6px; margin-left: -6px; transition: background .12s; }
.ct-opt.clickable:hover { background: var(--soft); }
.ct-opt.sel { background: var(--primary-soft); box-shadow: inset 3px 0 0 var(--primary); }
.ct-opt.sel.ok { background: var(--green-soft); box-shadow: inset 3px 0 0 var(--green); }
.ct-opt.sel.bad { background: var(--red-soft); box-shadow: inset 3px 0 0 var(--red); }
.ct-body.night .ct-page { background: #161925; color: #d7dbe8; border-color: #262a3a; }
.ct-body.night .ct-fig { filter: invert(.88) hue-rotate(180deg); }
.ct-mode button { padding: 5px 10px; font-size: 13px; }
.ct-body.imgmode { padding: 0; }
/* highlights */
mark.hl { color: inherit; border-radius: 3px; padding: 0 1px; cursor: pointer; }
mark.hl-y, mark.hl:not([class*="hl-"]) { background: #fff1a8; }
mark.hl-g { background: #c6f2d4; }
mark.hl-p { background: #ffd2e1; }
mark.hl-b { background: #cfe2ff; }
:root[data-theme="dark"] mark.hl-y, .night mark.hl-y { background: #6b5a12; }
:root[data-theme="dark"] mark.hl-g, .night mark.hl-g { background: #1f5a37; }
:root[data-theme="dark"] mark.hl-p, .night mark.hl-p { background: #6a2944; }
:root[data-theme="dark"] mark.hl-b, .night mark.hl-b { background: #23406e; }
.hl-bar { position: absolute; z-index: 95; display: flex; align-items: center; gap: 4px; padding: 6px; background: #171a2b; border-radius: 12px; box-shadow: var(--shadow-lg); }
.hl-bar button { border: 0; background: transparent; color: #fff; height: 30px; min-width: 30px; border-radius: 8px; cursor: pointer; display: inline-flex; align-items: center; justify-content: center; gap: 5px; font-weight: 600; font-size: 13px; padding: 0 6px; }
.hl-bar button:hover { background: rgba(255, 255, 255, .14); }
.hl-bar .hl-c { width: 24px; min-width: 24px; height: 24px; border-radius: 50%; border: 2px solid rgba(255, 255, 255, .7); }
.hl-bar .hl-y { background: #ffe066; } .hl-bar .hl-g { background: #6fdc95; } .hl-bar .hl-p { background: #ff8fb6; } .hl-bar .hl-b { background: #7fb2ff; }
/* dictionary popup */
.wpop { width: 340px; max-width: calc(100vw - 20px); max-height: 70vh; overflow: auto; }
.wpop .wp-senses { margin-top: 10px; font-size: 14.5px; }
.wpop .wp-sense { padding: 6px 0; border-bottom: 1px dashed var(--border); }
.wpop .wp-sense:last-child { border-bottom: 0; }
.wpop .pos { color: var(--primary); font-weight: 700; font-size: 12.5px; }
.wpop .wp-ex { color: var(--muted); font-size: 13px; margin-top: 2px; }
.wpop .wp-en { margin-top: 8px; padding: 8px 10px; border-radius: 10px; background: var(--surface-2); font-size: 13.5px; }
.wpop .wp-en > div + div { margin-top: 6px; }
.wpop .chip { padding: 3px 9px; font-size: 12px; }
.passage, .ct-doc, .script { cursor: text; }
.pv-bar .seg { flex-wrap: nowrap; flex-shrink: 0; padding: 3px; }
.pv-bar .seg button { white-space: nowrap; padding: 5px 10px; }
.ct-fs { display: inline-grid; place-items: center; height: 32px; min-width: 40px; font-size: 13px; }
.pv-bar .pv-zoom .icon-btn { font-size: 13px; }
:root[data-theme="dark"] ::selection { background: #4b45a8; color: #fff; }
.hl-bar { border: 1px solid rgba(255, 255, 255, .14); }

/* ===================== accounts, Premium, checkout, admin ===================== */
:root { --gold: #d99a06; --gold-soft: #fdf3d7; }
[data-theme="dark"] { --gold: #f5c04a; --gold-soft: #3b3217; }
.badge.prem { background: var(--gold-soft); color: var(--gold); }
.btn.sm { padding: 7px 12px; font-size: 13.5px; border-radius: 10px; }
.btn.block { width: 100%; }
.loader.sm { width: 16px; height: 16px; border-width: 2px; vertical-align: middle; }
.mono { font-family: 'JetBrains Mono', ui-monospace, monospace; letter-spacing: .02em; }
.justify-center { justify-content: center; }
.icon-btn.sm { width: 28px; height: 28px; border-radius: 8px; }

.avatar-btn { position: relative; width: 38px; height: 38px; border-radius: 50%; border: 2px solid var(--border); background: var(--primary-soft); color: var(--primary-ink); font-weight: 800; cursor: pointer; padding: 0; display: grid; place-items: center; flex-shrink: 0; }
.avatar-btn img { width: 100%; height: 100%; border-radius: 50%; object-fit: cover; }
.avatar-btn.premium { border-color: var(--gold); }
.avatar-btn .crown { position: absolute; right: -4px; bottom: -3px; width: 17px; height: 17px; border-radius: 50%; background: var(--gold); color: #fff; display: grid; place-items: center; font-style: normal; border: 2px solid var(--surface); }
.user-menu { position: fixed; z-index: 90; width: 270px; padding: 8px; display: flex; flex-direction: column; box-shadow: var(--shadow-lg); animation: fade .12s; }
.user-menu .um-head { padding: 10px 10px 12px; border-bottom: 1px solid var(--border); margin-bottom: 6px; min-width: 0; }
.user-menu a, .user-menu button { display: flex; align-items: center; gap: 10px; padding: 10px; border-radius: 10px; color: var(--text); font-weight: 600; background: none; border: 0; cursor: pointer; font-size: 14.5px; text-align: left; }
.user-menu a:hover, .user-menu button:hover { background: var(--soft); }

.auth-modal { padding: 28px; }
.auth-head { display: flex; gap: 12px; align-items: center; margin-bottom: 18px; }
.auth-head h2 { font-size: 21px; }
.google-btn { gap: 10px; }
.or { display: flex; align-items: center; gap: 10px; color: var(--muted); font-size: 12.5px; margin: 16px 0; }
.or::before, .or::after { content: ''; flex: 1; height: 1px; background: var(--border); }
.pw-wrap { position: relative; }
.pw-wrap .input { padding-right: 48px; }
.pw-wrap .icon-btn { position: absolute; right: 5px; top: 50%; transform: translateY(-50%); width: 32px; height: 32px; border: 0; background: transparent; }
.auth-links { display: flex; justify-content: space-between; gap: 10px; margin-top: 14px; flex-wrap: wrap; }
.col.gap-3 { gap: 12px; } .col.gap-2 { gap: 8px; }
.col { display: flex; flex-direction: column; }

.paywall { text-align: center; padding: 44px 28px; max-width: 640px; margin: 30px auto; }
.paywall h1 { font-size: 26px; }
.pw-ico { width: 68px; height: 68px; border-radius: 20px; display: grid; place-items: center; margin: 0 auto 16px; background: var(--gold-soft); color: var(--gold); }
.pw-ico.ok { background: var(--green-soft); color: var(--green); border-radius: 50%; }
.test-card.locked { opacity: .92; }
.test-card.locked .ttl::after { content: ' 🔒'; font-size: 14px; }

.promo { display: flex; align-items: center; gap: 14px; padding: 16px 18px; flex-wrap: wrap; border: 1px dashed var(--primary); background: linear-gradient(90deg, var(--primary-soft), transparent 70%); }
.promo.prem { border-color: var(--gold); background: linear-gradient(90deg, var(--gold-soft), transparent 70%); }
.promo.prem .icon-tile { background: var(--gold-soft); color: var(--gold); }
.promo .grow { min-width: 200px; }

.pricing { max-width: 1080px; }
.price-hero { text-align: center; max-width: 760px; margin: 10px auto 26px; }
.price-hero h1 { font-size: clamp(26px, 4vw, 38px); letter-spacing: -.02em; margin: 12px 0 10px; line-height: 1.15; }
.plan-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 18px; }
.plan-card { padding: 26px 24px; position: relative; display: flex; flex-direction: column; }
.plan-card.pop { border: 2px solid var(--primary); transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.plan-card h3 { font-size: 18px; }
.plan-price { font-size: 34px; font-weight: 800; letter-spacing: -.02em; margin: 8px 0 4px; }
.plan-card .btn { margin-top: auto; }
.plan-card .small { min-height: 20px; margin-bottom: 4px; }
.plan-flag { position: absolute; top: -12px; left: 50%; transform: translateX(-50%); background: var(--primary); color: #fff; font-size: 12px; font-weight: 800; padding: 4px 12px; border-radius: 999px; white-space: nowrap; }
.save { color: var(--green); }
.feat { list-style: none; padding: 0; margin: 12px 0 0; display: flex; flex-direction: column; gap: 10px; }
.feat li { display: flex; gap: 10px; align-items: flex-start; font-size: 14.5px; }
.feat li .ic { color: var(--green); flex-shrink: 0; margin-top: 2px; }
.feat li.no { color: var(--muted); }
.feat li.no .ic { color: var(--muted); }
.compare h3 { display: flex; align-items: center; gap: 8px; }
.faq { border-top: 1px solid var(--border); padding: 12px 0; }
.faq summary { font-weight: 700; cursor: pointer; }
.faq p { margin: 8px 0 0; color: var(--text-2); font-size: 14.5px; }

.checkout { width: min(680px, 100%); }
.co-head h2 { font-size: 22px; margin-top: 2px; }
.pm-opt { display: flex; align-items: center; gap: 14px; width: 100%; padding: 14px; border: 1px solid var(--border-strong); border-radius: 14px; background: var(--surface); cursor: pointer; text-align: left; color: var(--text); }
.pm-opt:hover { border-color: var(--primary); background: var(--surface-2); }
.pm-opt .grow { display: flex; flex-direction: column; gap: 2px; }
.pm-logo { width: 62px; height: 40px; border-radius: 10px; display: grid; place-items: center; font-weight: 800; font-size: 13px; color: #fff; flex-shrink: 0; }
.pm-logo.bank { background: linear-gradient(135deg, #0f766e, #14b8a6); }
.pm-logo.momo { background: #a50064; }
.pm-logo.zalo { background: #0068ff; font-size: 12px; }
.pm-logo.zalo b { color: #00e676; }
.co-bank { display: grid; grid-template-columns: 270px minmax(0, 1fr); gap: 20px; margin-top: 16px; align-items: start; }
.co-qr { text-align: center; }
.co-qr img { width: 100%; max-width: 260px; height: auto; border-radius: 12px; border: 1px solid var(--border); background: #fff; }
.co-row { display: flex; align-items: center; gap: 8px; padding: 8px 0; border-bottom: 1px dashed var(--border); font-size: 14.5px; }
.co-row .muted { width: 110px; flex-shrink: 0; }
.co-row b { flex: 1; min-width: 0; overflow-wrap: anywhere; }
.co-status { display: flex; gap: 10px; align-items: center; margin-top: 14px; font-weight: 600; font-size: 14px; color: var(--primary-ink); }
.co-wait, .co-success { text-align: center; padding: 30px 10px; }
.co-wait p { margin-top: 12px; }

.acc-grid { gap: 16px; }
.avatar-lg { width: 64px; height: 64px; border-radius: 50%; background: var(--primary-soft); color: var(--primary-ink); display: grid; place-items: center; font-size: 26px; font-weight: 800; flex-shrink: 0; overflow: hidden; }
.avatar-lg img { width: 100%; height: 100%; object-fit: cover; }
.plan-now h2 { display: flex; align-items: center; gap: 8px; margin-top: 4px; }
.plan-now.on { border: 2px solid var(--gold); background: linear-gradient(135deg, var(--gold-soft), var(--surface) 60%); }
.plan-now.on h2 .ic { color: var(--gold); }
.danger summary { cursor: pointer; color: var(--red); }
.sync-pick .pick { text-align: left; cursor: pointer; display: flex; flex-direction: column; gap: 4px; color: var(--text); }
.sync-pick .pick:hover { border-color: var(--primary); }

.adm-stats { grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 14px; }
.adm-stats .num { font-size: 28px; }

.site-foot { display: flex; flex-wrap: wrap; gap: 8px 18px; justify-content: center; padding: 30px 0 6px; font-size: 13px; color: var(--muted); }
.site-foot a { color: var(--muted); }
.site-foot a:hover { color: var(--primary); }

@media (max-width: 640px) {
  .co-bank { grid-template-columns: minmax(0, 1fr); }
  .co-qr img { max-width: 220px; }
  .co-row .muted { width: 92px; }
  .plan-card.pop { transform: none; }
  .promo .btn { flex: 1; }
  .user-menu { width: calc(100vw - 16px); }
}
.nav a[data-nav="pricing"] { color: var(--gold); }
.nav a[data-nav="pricing"].active { background: var(--gold-soft); color: var(--gold); }
@media (min-width: 1101px) and (max-width: 1440px) {
  .pill-stat.hide-sm { display: none; }
  .nav a { padding: 8px 10px; gap: 6px; }
  .topbar-in { gap: 12px; }
}

/* ---------- bank transfer (VietQR) screen ---------- */
.checkout { width: min(760px, 100%); }
.pm-logo.bank { background: #fff; border: 1px solid var(--border); color: var(--primary); }
.pm-logo.bank img { max-width: 54px; max-height: 30px; object-fit: contain; }
.bp-top { display: flex; justify-content: space-between; align-items: flex-end; gap: 12px; flex-wrap: wrap; padding-right: 36px; }
.bp-top h2 { font-size: 21px; margin-top: 2px; display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; }
.bp-amt { color: var(--primary); font-size: 22px; font-weight: 800; }
.bp-code { font-size: 13px; color: var(--text-2); background: var(--soft); border: 1px solid var(--border); border-radius: 999px; padding: 5px 12px; white-space: nowrap; }
.bp-steps { list-style: none; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; padding: 0; margin: 16px 0; }
.bp-steps li { display: flex; align-items: center; gap: 8px; font-size: 13px; font-weight: 600; color: var(--text-2); background: var(--surface-2); border: 1px solid var(--border); border-radius: 12px; padding: 8px 10px; }
.bp-steps i { font-style: normal; width: 22px; height: 22px; border-radius: 50%; background: var(--primary); color: #fff; display: grid; place-items: center; font-size: 12px; font-weight: 800; flex-shrink: 0; }
.bp-grid { display: grid; grid-template-columns: 250px minmax(0, 1fr); gap: 22px; align-items: start; }
.bp-qr { text-align: center; }
.bp-qrbox { background: #fff; border-radius: 16px; padding: 8px; border: 1px solid var(--border); box-shadow: var(--shadow); }
.bp-qrbox img { width: 100%; height: auto; display: block; aspect-ratio: 540 / 640; }
.bp-dl { display: inline-flex; align-items: center; gap: 6px; margin-top: 10px; font-size: 13.5px; font-weight: 700; }
.bp-bank { display: flex; align-items: center; gap: 12px; padding: 12px 14px; border-radius: 14px; background: var(--surface-2); border: 1px solid var(--border); margin-bottom: 6px; }
.bp-bank img { width: 64px; height: 32px; object-fit: contain; background: #fff; border-radius: 8px; padding: 3px; flex-shrink: 0; }
.bp-bank b { display: block; font-size: 15px; }
.bp-bank span { font-size: 12.5px; color: var(--muted); }
.bp-row { display: grid; grid-template-columns: 118px minmax(0, 1fr) auto; align-items: center; gap: 8px; padding: 10px 2px; border-bottom: 1px dashed var(--border); }
.bp-l { color: var(--muted); font-size: 13.5px; }
.bp-v { font-size: 15.5px; overflow-wrap: anywhere; letter-spacing: .01em; }
.bp-row.hl { background: var(--amber-soft); border-radius: 10px; padding: 10px 8px; border-bottom: 0; margin-top: 4px; }
.bp-row.hl .bp-v { font-family: 'JetBrains Mono', ui-monospace, monospace; font-size: 16.5px; color: #9a6a06; }
.bp-copy { display: inline-flex; align-items: center; gap: 5px; border: 1px solid var(--border-strong); background: var(--surface); color: var(--text-2); border-radius: 8px; padding: 5px 9px; font-size: 12.5px; font-weight: 700; cursor: pointer; }
.bp-copy:hover { border-color: var(--primary); color: var(--primary); }
.bp-copy.done { background: var(--green-soft); color: var(--green); border-color: transparent; }
.bp-warn { display: flex; gap: 8px; font-size: 13px; color: var(--text-2); margin: 12px 0; }
.bp-warn .ic { color: var(--amber); flex-shrink: 0; margin-top: 1px; }
.bp-status { display: flex; gap: 10px; align-items: flex-start; padding: 12px 14px; border-radius: 12px; background: var(--primary-soft); color: var(--text); font-size: 14px; }
.bp-status .loader { margin-top: 2px; flex-shrink: 0; }
.bp-status.ok { background: var(--green-soft); }
.bp-status.ok .ic { color: var(--green); flex-shrink: 0; margin-top: 1px; }
.bp-foot { margin-top: 16px; text-align: center; }
.bp-mobile { display: none; gap: 8px; font-size: 13px; color: var(--text-2); background: var(--surface-2); border: 1px solid var(--border); border-radius: 12px; padding: 10px 12px; margin: 12px 0; }
.bp-mobile .ic { color: var(--primary); flex-shrink: 0; margin-top: 1px; }
@media (max-width: 680px) {
  .bp-grid { grid-template-columns: minmax(0, 1fr); }
  .bp-qr { max-width: 250px; margin: 0 auto; }
  .bp-steps { display: none; }
  .bp-mobile { display: flex !important; }
  .bp-info { order: -1; }
  .bp-row { grid-template-columns: 96px minmax(0, 1fr) auto; }
  .bp-copy span { display: none; }
}