:root {
  --paper: #F7F7FA;
  --panel: #FFFFFF;
  --panel-2: #FBFBFD;
  --ink: #17171E;
  --ink-soft: #45454F;
  --ink-mute: #71717C;
  --line: rgba(17, 17, 26, .12);
  --line-soft: rgba(17, 17, 26, .07);
  --accent: #4F46E5;
  --accent-deep: #6366F1;
  --accent-soft: rgba(99, 102, 241, .08);
  --accent-line: rgba(99, 102, 241, .45);
  --glow: 0 0 20px rgba(99, 102, 241, .2);
  --glow-soft: 0 0 15px rgba(99, 102, 241, .12);
  --good: #059669;
  --good-soft: rgba(16, 185, 129, .1);
  --bad: #DC2626;
  --bad-soft: rgba(248, 113, 113, .1);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "IBM Plex Mono", "SF Mono", Menlo, monospace;
  --radius: 12px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}
body {
  font-family: var(--font-sans);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.6;
  font-size: 15.5px;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { color: #4338CA; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
::selection { background: rgba(99, 102, 241, .2); }

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

.mono {
  font-family: var(--font-mono); font-size: 11px; font-weight: 500;
  letter-spacing: 2px; text-transform: uppercase;
}

/* Header (inner pages) */
.site-head {
  border-bottom: 1px solid var(--line-soft);
  background: rgba(255, 255, 255, .85);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  position: sticky; top: 0; z-index: 50;
}
.site-head .wrap { display: flex; align-items: center; justify-content: space-between; height: 58px; }
.brand {
  font-family: var(--font-mono); font-weight: 600; font-size: 13px;
  letter-spacing: 3px; text-transform: uppercase; color: var(--ink);
}
.brand span { color: var(--accent); }
.head-nav { display: flex; gap: 2px; font-size: 13px; font-weight: 500; }
.head-nav a { color: var(--ink-soft); padding: 7px 13px; border-radius: 8px; transition: color .15s ease, background .15s ease; }
.head-nav a:hover { background: var(--panel); color: var(--ink); }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  border: none; cursor: pointer; font-family: var(--font-sans); font-size: 14.5px; font-weight: 600;
  border-radius: 10px; padding: 13px 26px;
  transition: transform .15s ease, background .15s ease, border-color .15s ease, box-shadow .15s ease, opacity .15s ease;
}
.btn:hover { transform: translateY(-1px); text-decoration: none; }
.btn:active { transform: translateY(0) scale(.985); }
.btn-primary { background: #17171E; color: #FFFFFF; }
.btn-primary:hover { background: #2A2A34; color: #FFFFFF; box-shadow: 0 0 10px rgba(99, 102, 241, .4); }
.btn-cta { background: #17171E; color: #FFFFFF; }
.btn-cta:hover { background: #2A2A34; color: #FFFFFF; box-shadow: 0 0 10px rgba(99, 102, 241, .4); }
.btn-ghost { background: transparent; color: var(--ink-soft); border: 1px solid var(--line); }
.btn-ghost:hover { border-color: rgba(17, 17, 26, .3); color: var(--ink); }
.btn:disabled { opacity: .4; cursor: not-allowed; transform: none; }
.btn-sm { padding: 9px 16px; font-size: 13px; }

/* Inputs */
.gap-input, .name-row input {
  width: 100%; padding: 12px 15px; font-size: 15px; color: var(--ink);
  border: 1px solid var(--line); border-radius: 9px; background: var(--panel-2);
  font-family: var(--font-sans); transition: border-color .18s ease;
}
.gap-input { max-width: 320px; }
.name-row input { max-width: 340px; }
.gap-input:focus, .name-row input:focus { border-color: var(--accent-line); outline: none; }
.gap-input::placeholder, .name-row input::placeholder { color: #A3A3AD; }

/* Back navigation */
.back-link {
  display: inline-flex; align-items: center; gap: 7px;
  font-family: var(--font-mono); font-size: 10.5px; font-weight: 500;
  letter-spacing: 1.8px; text-transform: uppercase; color: var(--ink-mute); margin-bottom: 18px;
}
.back-link:hover { color: var(--accent); }
.runner-back {
  display: inline-flex; align-items: center; gap: 7px; flex: none;
  font-family: var(--font-mono); font-size: 10.5px; font-weight: 500;
  letter-spacing: 1.5px; text-transform: uppercase; color: var(--ink-mute); white-space: nowrap;
}
.runner-back:hover { color: var(--accent); }
.runner-back.warn { color: var(--bad); }

/* Test runner */
.runner-head {
  border-bottom: 1px solid var(--line-soft);
  background: rgba(255, 255, 255, .88); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  position: sticky; top: 0; z-index: 60;
}
.runner-head .wrap { display: flex; align-items: center; justify-content: space-between; height: 54px; gap: 12px; }
.runner-title {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 1.5px; text-transform: uppercase;
  font-weight: 500; color: var(--ink-soft); white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.timer {
  font-family: var(--font-mono); font-variant-numeric: tabular-nums; font-weight: 600; font-size: 15px;
  padding: 6px 14px; border-radius: 8px; background: var(--accent-soft); color: var(--accent);
  border: 1px solid var(--accent-line);
}
.timer.low { background: var(--bad-soft); color: var(--bad); border-color: rgba(248, 113, 113, .3); }

.intro-panel {
  max-width: 660px; margin: 64px auto; background: var(--panel);
  border: 1px solid var(--line-soft); border-radius: 15px; padding: 40px 40px 36px;
  box-shadow: var(--glow-soft);
}
.intro-panel h1 { font-size: 30px; font-weight: 600; letter-spacing: -0.03em; margin-bottom: 10px; line-height: 1.15; }
.intro-panel .std {
  display: inline-block; font-family: var(--font-mono); font-size: 10.5px; font-weight: 500;
  letter-spacing: 2px; text-transform: uppercase; color: var(--accent); margin-bottom: 16px;
}
.intro-panel ul { margin: 16px 0 24px 18px; font-size: 14.5px; color: var(--ink-soft); }
.intro-panel li { margin-bottom: 8px; }
.intro-panel b { color: var(--ink); }
.name-row { margin: 22px 0; }
.name-row label {
  display: block; font-family: var(--font-mono); font-size: 10.5px; font-weight: 500;
  text-transform: uppercase; letter-spacing: 1.8px; color: var(--ink-mute); margin-bottom: 8px;
}

.test-body { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 0; height: calc(100vh - 54px); }
.pane { overflow-y: auto; padding: 30px 32px 96px; }
.pane-passage { border-right: 1px solid var(--line-soft); background: var(--panel-2); }
.pane-passage h2 { font-size: 22px; font-weight: 600; letter-spacing: -0.02em; margin-bottom: 16px; }
.passage-text p { margin-bottom: 15px; font-size: 15.5px; line-height: 1.8; color: var(--ink-soft); }
.single-col { max-width: 780px; margin: 0 auto; height: auto; display: block; }

.part-tabs { display: flex; gap: 8px; margin-bottom: 22px; flex-wrap: wrap; }
.part-tab {
  padding: 8px 16px; font-family: var(--font-mono); font-size: 11px; letter-spacing: 1.5px;
  text-transform: uppercase; font-weight: 500; border-radius: 999px;
  border: 1px solid var(--line); background: transparent; cursor: pointer; color: var(--ink-soft);
  transition: border-color .15s ease, color .15s ease, background .15s ease;
}
.part-tab:hover { border-color: rgba(17, 17, 26, .3); color: var(--ink); }
.part-tab.active { background: #17171E; border-color: #17171E; color: #FFFFFF; }

.q-block {
  background: var(--panel); border: 1px solid var(--line-soft); border-radius: var(--radius);
  padding: 20px 24px; margin-bottom: 14px;
}
.q-block .q-num {
  font-family: var(--font-mono); font-size: 10.5px; font-weight: 500; letter-spacing: 2px;
  text-transform: uppercase; color: var(--accent); margin-bottom: 10px;
}
.q-block .q-passage { font-size: 14.5px; color: var(--ink-soft); border-left: 2px solid var(--accent-line); padding-left: 15px; margin-bottom: 13px; line-height: 1.75; }
.q-block .q-prompt { font-size: 15px; font-weight: 500; margin-bottom: 13px; }
.q-block .q-prompt u { text-decoration-color: var(--accent); }
.q-block table { border-collapse: collapse; margin: 0 0 13px; font-size: 13px; }
.q-block table th, .q-block table td { border: 1px solid var(--line); padding: 7px 11px; }
.q-block table th { background: var(--panel-2); font-weight: 600; }
.opt {
  display: flex; gap: 11px; align-items: flex-start; padding: 11px 14px;
  border: 1px solid var(--line); border-radius: 9px; margin-bottom: 8px; cursor: pointer; font-size: 14.5px;
  color: var(--ink-soft);
  transition: border-color .13s ease, background .13s ease, color .13s ease;
}
.opt:hover { border-color: rgba(17, 17, 26, .3); color: var(--ink); }
.opt input { margin-top: 4px; accent-color: var(--accent-deep); }
.opt.sel { border-color: var(--accent-line); background: var(--accent-soft); color: var(--ink); }
.q-svg { margin: 0 0 13px; }
.q-svg svg { max-width: 320px; height: auto; }

.audio-bar {
  background: var(--panel); border: 1px solid var(--accent-line); border-radius: var(--radius);
  padding: 16px 20px; margin-bottom: 20px;
  display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
}
.audio-bar .status { font-size: 13.5px; color: var(--ink-soft); }

.submit-bar {
  position: fixed; bottom: 0; left: 0; right: 0;
  background: rgba(255, 255, 255, .92); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid var(--line-soft); padding: 12px 20px;
  display: flex; justify-content: space-between; align-items: center; gap: 12px; z-index: 70;
}
.answered-count { font-family: var(--font-mono); font-size: 11px; letter-spacing: 1px; text-transform: uppercase; color: var(--ink-mute); }

/* Results screen */
.score-hero { text-align: center; padding: 56px 20px 12px; }
.score-hero .big {
  font-size: 84px; font-weight: 600; letter-spacing: -0.025em; line-height: 1;
  background: linear-gradient(180deg, #17171E, #55555F); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.score-hero .label {
  font-family: var(--font-mono); font-size: 10.5px; text-transform: uppercase; letter-spacing: 2px;
  color: var(--accent); margin-top: 14px; font-weight: 500;
}
.score-hero .raw { margin-top: 8px; font-size: 15px; color: var(--ink-soft); }
.section-title { font-size: 22px; font-weight: 600; letter-spacing: -0.02em; margin: 40px 0 14px; }
.review-item { border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 18px; margin-bottom: 10px; background: var(--panel); }
.review-item.ok { border-left: 3px solid var(--good); }
.review-item.no { border-left: 3px solid var(--bad); }
.review-item .rq { font-size: 14px; font-weight: 500; margin-bottom: 6px; }
.review-item .ra { font-size: 13.5px; color: var(--ink-soft); }
.review-item .ra b.good { color: var(--good); }
.review-item .ra b.bad { color: var(--bad); }
.review-item .rex { font-size: 13px; color: var(--ink-mute); margin-top: 6px; line-height: 1.6; }

/* Writing */
.writing-grid { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 18px; align-items: start; margin-top: 20px; }
.prompt-card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; font-size: 14.5px; color: var(--ink-soft); }
.prompt-card .t-label {
  font-family: var(--font-mono); font-size: 10.5px; font-weight: 500; text-transform: uppercase;
  letter-spacing: 2px; color: var(--accent); margin-bottom: 10px;
}
.prompt-card svg { max-width: 100%; height: auto; margin-top: 12px; }
.essay-box textarea {
  width: 100%; min-height: 420px; padding: 18px; font-size: 15px; line-height: 1.75; color: var(--ink);
  border: 1px solid var(--line); border-radius: var(--radius); font-family: var(--font-sans);
  resize: vertical; background: var(--panel-2); transition: border-color .18s ease;
}
.essay-box textarea:focus { border-color: var(--accent-line); outline: none; }
.essay-meta { display: flex; justify-content: space-between; align-items: center; margin-top: 9px; font-size: 13px; color: var(--ink-mute); font-family: var(--font-mono); }
.wordcount.under { color: var(--bad); font-weight: 600; }
.wordcount.okay { color: var(--good); font-weight: 600; }
.checklist { margin-top: 20px; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px 22px; font-size: 14px; }
.checklist h3 { font-size: 15px; font-weight: 600; margin-bottom: 12px; }
.checklist label { display: flex; gap: 9px; margin-bottom: 8px; color: var(--ink-soft); cursor: pointer; }
.checklist input { accent-color: var(--accent-deep); }

/* Speaking */
.cue-card {
  background: var(--panel); border: 1px solid var(--line); border-left: 3px solid var(--accent);
  border-radius: var(--radius); padding: 24px 26px; margin: 16px 0; font-size: 15px;
}
.cue-card h3 { font-size: 19px; font-weight: 600; letter-spacing: -0.01em; margin-bottom: 10px; }
.cue-card ul { margin: 10px 0 0 20px; color: var(--ink-soft); }
.spk-timer {
  font-family: var(--font-mono); font-variant-numeric: tabular-nums;
  font-size: 44px; font-weight: 600; color: #17171E;
}
.rec-row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin: 14px 0; }
.rec-dot { width: 9px; height: 9px; border-radius: 50%; background: var(--bad); display: inline-block; animation: blink 1s infinite; }
@keyframes blink { 50% { opacity: .2; } }

/* Legacy hub classes kept for inner pages that reference them */
.section-note { color: var(--ink-mute); font-size: 14px; margin: 6px 0 20px; }
.empty-note { color: var(--ink-mute); font-size: 14px; padding: 24px 22px; background: var(--panel); border: 1px dashed var(--line); border-radius: var(--radius); }
.results-table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.results-table th, .results-table td { text-align: left; padding: 12px 16px; border-bottom: 1px solid var(--line-soft); }
.results-table th {
  font-family: var(--font-mono); font-size: 10px; text-transform: uppercase; letter-spacing: 1.8px;
  color: var(--ink-mute); font-weight: 500; background: var(--panel-2);
}
.results-table tr:last-child td { border-bottom: none; }
.results-table td.score-cell { font-weight: 600; color: var(--accent); font-variant-numeric: tabular-nums; }
.results-card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.site-foot { margin-top: 72px; border-top: 1px solid var(--line-soft); padding: 26px 0 40px; font-size: 12px; color: var(--ink-mute); }
.site-foot .wrap { display: flex; flex-wrap: wrap; gap: 16px; justify-content: space-between; }
.site-foot a { color: var(--ink-mute); }
.site-foot a:hover { color: var(--ink-soft); }

@media (max-width: 860px) {
  .test-body { grid-template-columns: 1fr; height: auto; }
  .pane { overflow: visible; padding: 20px 16px 96px; }
  .pane-passage { border-right: none; border-bottom: 1px solid var(--line-soft); max-height: 46vh; overflow-y: auto; position: sticky; top: 54px; }
  .writing-grid { grid-template-columns: 1fr; }
  .intro-panel { margin: 24px 16px; padding: 28px 24px; }
}