/* ============================================================
   PTE Trainer — common chrome
   Shared by index.html (Hub), writing.html, speak.html, readaloud.html
   Theme variables, nav/header, section cards, settings overlay,
   and generic buttons. Page-specific styles live in each file.
   ============================================================ */

:root {
  --color-bg: #f5f6fb;
  --color-card: #ffffff;
  --color-text: #1b1d29;
  --color-muted: #6b6f86;
  --color-border: #e4e6f0;

  --color-accent: #4f46e5;
  --color-accent-dark: #4338ca;
  --color-accent-soft: #eef0ff;

  --color-good: #16a34a;
  --color-good-bg: #e9f8ee;
  --color-warn: #d97706;
  --color-warn-bg: #fef3e2;
  --color-bad: #dc2626;
  --color-bad-bg: #fdeaea;

  --font-display: 'Iowan Old Style', 'Palatino Linotype', Georgia, serif;
  --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'SF Mono', 'Menlo', 'Consolas', 'Roboto Mono', monospace;

  --radius: 14px;
}

/* ---------------- Dark theme ---------------- */
:root[data-theme="dark"],
body.theme-dark {
  color-scheme: dark;
  --color-bg: #12141c;
  --color-card: #1c1f2b;
  --color-text: #e7e9f2;
  --color-muted: #9aa0b5;
  --color-border: #2c3140;

  --color-accent: #818cf8;
  --color-accent-dark: #6366f1;
  --color-accent-soft: #232544;

  --color-good: #4ade80;
  --color-good-bg: #14321f;
  --color-warn: #fbbf24;
  --color-warn-bg: #3a2c0c;
  --color-bad: #f87171;
  --color-bad-bg: #3a1717;
}

/* ---------------- Sepia theme ---------------- */
:root[data-theme="sepia"],
body.theme-sepia {
  color-scheme: light;
  --color-bg: #f3ead3;
  --color-card: #fbf5e6;
  --color-text: #433422;
  --color-muted: #8a7a5e;
  --color-border: #e3d6b8;

  --color-accent: #9a5b2e;
  --color-accent-dark: #7c4621;
  --color-accent-soft: #efe2cf;

  --color-good: #2f8f4f;
  --color-good-bg: #e6efd9;
  --color-warn: #b5730a;
  --color-warn-bg: #f5e8cf;
  --color-bad: #c0392b;
  --color-bad-bg: #f3ddd6;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

.hidden { display: none !important; }
.muted { color: var(--color-muted); font-size: .92rem; }
.card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 22px;
  margin-bottom: 18px;
  box-shadow: 0 1px 3px rgba(20, 22, 40, .04);
}
.card-wide { max-width: 820px; margin: 40px auto; padding: 32px; }
.section-title { font-size: 1.15rem; margin: 0 0 10px; font-weight: 700; }

/* ---------------- Buttons ---------------- */
.btn {
  font-family: inherit; font-size: 1rem; font-weight: 600;
  border: 1px solid transparent; border-radius: 10px;
  padding: 12px 18px; cursor: pointer; text-align: center;
  transition: background .12s ease, border-color .12s ease, transform .06s ease;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--color-accent); color: #fff; }
.btn-primary:hover { background: var(--color-accent-dark); }
.btn-secondary { background: #fff; color: var(--color-accent); border-color: var(--color-border); }
.btn-secondary:hover { border-color: var(--color-accent); background: var(--color-accent-soft); }
.btn-ghost { background: transparent; color: var(--color-muted); border-color: transparent; }
.btn-ghost:hover { color: var(--color-accent); background: var(--color-accent-soft); }
.btn-stop { color: var(--color-bad, #dc2626); }
.btn-stop:hover { color: #fff; background: var(--color-bad, #dc2626); border-color: var(--color-bad, #dc2626); }
.btn-danger-ghost { background: transparent; color: var(--color-bad); border-color: var(--color-border); }
.btn-danger-ghost:hover { background: var(--color-bad-bg); }
.btn-small { font-size: .85rem; padding: 8px 12px; border-radius: 8px; }
.btn-block { width: 100%; }
.row-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 14px; }
.row-actions.wrap { align-items: center; }

/* ---------------- Top bar (used on every page) ---------------- */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  max-width: 920px; margin: 0 auto; padding: 16px 20px;
}
.topbar .brand { display: flex; align-items: center; gap: 10px; font-weight: 700; }
.topbar .brand .logo {
  width: 30px; height: 30px; border-radius: 8px;
  background: var(--color-accent); color: #fff;
  display: flex; align-items: center; justify-content: center; font-size: 1rem;
}
.topbar .home-link { color: var(--color-muted); text-decoration: none; font-weight: 600; }
.topbar .home-link:hover { color: var(--color-accent); }
.topbar-actions { display: flex; align-items: center; gap: 8px; }
.topbar .page-title { font-weight: 700; }
.btn-icon {
  width: 40px; height: 40px; border-radius: 10px; border: 1px solid var(--color-border);
  background: #fff; cursor: pointer; font-size: 1.1rem; display: inline-flex;
  align-items: center; justify-content: center; color: var(--color-text);
}
.btn-icon:hover { border-color: var(--color-accent); color: var(--color-accent); }

/* ---------------- Main Hub ---------------- */
.hub-wrap { max-width: 920px; margin: 0 auto; padding: 8px 20px 60px; }
.hub-hero { text-align: center; padding: 36px 12px 20px; }
.hub-hero h1 { font-size: 2rem; margin: 0 0 8px; font-family: var(--font-display); }
.hub-hero p { color: var(--color-muted); margin: 0 auto; max-width: 620px; }
.hub-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 18px; margin-top: 18px;
}
.hub-card {
  background: var(--color-card); border: 1px solid var(--color-border);
  border-radius: var(--radius); padding: 24px; cursor: pointer; text-align: left;
  transition: border-color .12s ease, transform .08s ease, box-shadow .12s ease;
  display: flex; flex-direction: column; gap: 8px; text-decoration: none; color: inherit;
}
.hub-card:hover { border-color: var(--color-accent); transform: translateY(-2px); box-shadow: 0 8px 22px rgba(79,70,229,.12); }
.hub-card .hub-icon {
  width: 48px; height: 48px; border-radius: 12px; background: var(--color-accent-soft);
  color: var(--color-accent); display: flex; align-items: center; justify-content: center; font-size: 1.5rem;
}
.hub-card h2 { margin: 6px 0 0; font-size: 1.2rem; }
.hub-card p { margin: 0; color: var(--color-muted); font-size: .92rem; }
.hub-card .hub-go { margin-top: 6px; font-weight: 700; color: var(--color-accent); }
.hub-foot { text-align: center; color: var(--color-muted); font-size: .85rem; margin-top: 28px; }

/* ---------------- Settings overlay (shared) ---------------- */
.settings-overlay {
  position: fixed; inset: 0; background: rgba(20,22,40,.45);
  display: flex; align-items: center; justify-content: center; z-index: 1000; padding: 20px;
}
.settings-panel {
  background: var(--color-card); border-radius: 16px; width: 100%; max-width: 460px;
  padding: 24px; box-shadow: 0 20px 60px rgba(0,0,0,.25); max-height: 90vh; overflow: auto;
}
.settings-panel h2 { margin: 0 0 4px; font-size: 1.2rem; }
.settings-panel .muted { margin-top: 0; }
.settings-row { margin: 16px 0; }
.settings-row label { display: block; font-weight: 600; margin-bottom: 6px; font-size: .92rem; }
.settings-row select, .settings-row input[type="range"] { width: 100%; }
.settings-row .rate-value { color: var(--color-accent); font-weight: 700; }
.settings-close { float: right; }
.settings-divider { height: 1px; background: var(--color-border); margin: 18px 0; }
.settings-theme { display: flex; gap: 8px; }
.theme-swatch { width: 36px; height: 36px; border-radius: 50%; border: 2px solid transparent; cursor: pointer; }
.theme-swatch.active { border-color: var(--color-accent); }
.theme-swatch[data-theme="light"] { background: #f5f6fb; border: 1px solid #e4e6f0; }
.theme-swatch[data-theme="dark"] { background: #16181f; }
.theme-swatch[data-theme="sepia"] { background: #f3ead3; }

/* ---------------- Support banner ---------------- */
.support-banner {
  background: var(--color-warn-bg); border: 1px solid #f3d9a8; color: #8a5a00;
  border-radius: 10px; padding: 14px 16px; margin-bottom: 24px; font-size: .92rem; line-height: 1.5;
}
.support-banner code { background: #fff; padding: 1px 6px; border-radius: 4px; font-family: var(--font-mono); }

/* ---------------- Screens (shared app layout) ---------------- */
.screen { display: none; }
.screen.active { display: block; }
.app { min-height: 100vh; }

/* Right-side per-item stat chip (best % + practiced count) */
.ra-best { text-align: right; }
.ra-tries { display: inline-block; margin-top: 4px; font-size: .72rem; color: var(--color-muted);
  background: #f1f2f7; border: 1px solid var(--color-border); border-radius: 999px; padding: 2px 8px; white-space: nowrap; }

@media (prefers-color-scheme: dark) {
  /* default dark adoption handled via theme class; leave base light */
}

/* ---------------- Enabling-skill score bars (Phase 2) ---------------- */
.honesty-note {
  font-size: .78rem; color: var(--color-muted); background: var(--color-accent-soft);
  border: 1px solid var(--color-border); border-radius: 8px; padding: 6px 10px; margin: 10px 0;
}
.skill-bars { display: flex; flex-direction: column; gap: 8px; margin: 12px 0; }
.skill-row { display: grid; grid-template-columns: 96px 1fr 42px; align-items: center; gap: 10px; }
.skill-row .skill-name { font-size: .85rem; color: var(--color-text); }
.skill-track { height: 12px; background: var(--color-border); border-radius: 999px; overflow: hidden; }
.skill-fill { display: block; height: 100%; border-radius: 999px; transition: width .4s ease; }
.skill-fill.good { background: var(--color-good); }
.skill-fill.warn { background: var(--color-warn); }
.skill-fill.bad { background: var(--color-bad); }
.skill-val { font-size: .85rem; font-weight: 700; text-align: right; color: var(--color-text); }
.skill-val.good { color: var(--color-good); }
.skill-val.warn { color: var(--color-warn); }
.skill-val.bad { color: var(--color-bad); }

/* ---------------- Countdown timer (Phase 3) ---------------- */
.pte-timer {
  display: inline-flex; align-items: center; gap: 8px; font-weight: 700; font-variant-numeric: tabular-nums;
  background: var(--color-accent-soft); color: var(--color-accent-dark); border-radius: 999px; padding: 6px 14px; font-size: 1rem;
}
.pte-timer.warn { background: var(--color-warn-bg); color: var(--color-warn); animation: pte-pulse 1s infinite; }
.pte-timer.danger { background: var(--color-bad-bg); color: var(--color-bad); animation: pte-pulse .6s infinite; }
@keyframes pte-pulse { 50% { opacity: .55; } }

/* ---------------- Word reason tags (Phase 2) ---------------- */
.w-reason { font-size: .68rem; color: var(--color-muted); margin-left: 6px; vertical-align: middle; }
.w-reason.fluency { color: var(--color-warn); }
.w-reason.pron { color: var(--color-bad); }

/* ---------------- High-contrast theme (Phase 7) ---------------- */
:root[data-theme="contrast"],
body.theme-contrast {
  color-scheme: dark;
  --color-bg: #000000;
  --color-card: #0a0a0a;
  --color-text: #ffffff;
  --color-muted: #d0d0d0;
  --color-border: #ffffff;
  --color-accent: #ffe600;
  --color-accent-dark: #ffe600;
  --color-accent-soft: #1a1a00;
  --color-good: #00ff7f; --color-good-bg: #002410;
  --color-warn: #ffd000; --color-warn-bg: #2a2200;
  --color-bad: #ff5b5b; --color-bad-bg: #2a0000;
}

/* ============================================================
   AESTHETIC LAYER — orthogonal to color theme.
   Bold = sharp, premium exam tool. Playful = rounded, friendly.
   Applied via [data-aesthetic="..."] on <html>.
   ============================================================ */

/* ---------- Bold (default) ---------- */
[data-aesthetic="bold"] {
  --radius: 8px;
  --shadow-card: 0 4px 16px rgba(20, 22, 40, .08), 0 1px 3px rgba(20, 22, 40, .04);
  --shadow-hover: 0 12px 32px rgba(79, 70, 229, .18);
  letter-spacing: .01em;
}
[data-aesthetic="bold"] .card,
[data-aesthetic="bold"] .asq-main,
[data-aesthetic="bold"] .hub-card {
  box-shadow: var(--shadow-card);
  border-width: 1px;
}
[data-aesthetic="bold"] .hub-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}
[data-aesthetic="bold"] .btn {
  text-transform: uppercase;
  letter-spacing: .04em;
  font-size: .82rem;
  padding: 12px 20px;
  border-radius: 8px;
  background-image: linear-gradient(180deg, var(--color-accent), var(--color-accent-dark));
  box-shadow: 0 2px 6px rgba(79, 70, 229, .25);
}
[data-aesthetic="bold"] .btn-primary {
  background: var(--color-accent);
}
[data-aesthetic="bold"] .btn-secondary {
  box-shadow: none;
  border-width: 1.5px;
}
[data-aesthetic="bold"] .hub-card .hub-icon {
  border-radius: 10px;
  font-size: 1.4rem;
}
[data-aesthetic="bold"] .hub-hero h1 {
  letter-spacing: -.02em;
  font-size: 2.2rem;
}
[data-aesthetic="bold"] .asq-q,
[data-aesthetic="bold"] .hub-card h2 {
  letter-spacing: -.01em;
}
[data-aesthetic="bold"] .pte-timer {
  border-radius: 6px;
  font-weight: 800;
  letter-spacing: .03em;
}
[data-aesthetic="bold"] .skill-track {
  height: 14px;
  border-radius: 4px;
}
[data-aesthetic="bold"] .skill-fill {
  border-radius: 4px;
}
[data-aesthetic="bold"] .mic-btn {
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(79, 70, 229, .3);
}
[data-aesthetic="bold"] .mic-btn.listening {
  box-shadow: 0 4px 16px rgba(220, 38, 38, .4);
}
[data-aesthetic="bold"] .asq-result,
[data-aesthetic="bold"] .asq-cat,
[data-aesthetic="bold"] .asq-diff-btn {
  border-radius: 6px;
}
[data-aesthetic="bold"] .settings-panel {
  border-radius: 12px;
}
[data-aesthetic="bold"] .aesthetic-btn.active {
  background: var(--color-accent);
  color: #fff;
}

/* ---------- Playful ---------- */
[data-aesthetic="playful"] {
  --radius: 22px;
  --shadow-card: 0 6px 20px rgba(20, 22, 40, .06);
  --shadow-hover: 0 10px 28px rgba(79, 70, 229, .14);
  font-family: 'Nunito', 'Quicksand', var(--font-body);
}
[data-aesthetic="playful"] .card,
[data-aesthetic="playful"] .asq-main,
[data-aesthetic="playful"] .hub-card {
  box-shadow: var(--shadow-card);
  border-width: 2px;
  border-color: var(--color-border);
  border-radius: 22px;
}
[data-aesthetic="playful"] .hub-card {
  transition: border-color .15s ease, transform .15s cubic-bezier(.34, 1.56, .64, 1), box-shadow .15s ease;
}
[data-aesthetic="playful"] .hub-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px) scale(1.01);
  border-color: var(--color-accent);
}
[data-aesthetic="playful"] .hub-card .hub-icon {
  border-radius: 18px;
  font-size: 1.8rem;
  background: linear-gradient(135deg, var(--color-accent-soft), #fff);
}
[data-aesthetic="playful"] .hub-card h2 {
  font-weight: 800;
}
[data-aesthetic="playful"] .hub-hero .logo-big {
  border-radius: 24px;
  font-size: 2.6rem;
  animation: playful-bounce 2.5s ease-in-out infinite;
}
@keyframes playful-bounce {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-8px) rotate(3deg); }
}
[data-aesthetic="playful"] .hub-hero h1 {
  font-size: 2.2rem;
  background: linear-gradient(90deg, var(--color-accent), #ec4899);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
[data-aesthetic="playful"] .btn {
  border-radius: 18px;
  font-size: .95rem;
  padding: 12px 20px;
  font-weight: 700;
  box-shadow: 0 3px 0 rgba(0,0,0,.08);
  transition: transform .1s ease, box-shadow .1s ease;
}
[data-aesthetic="playful"] .btn:active {
  transform: translateY(2px);
  box-shadow: 0 1px 0 rgba(0,0,0,.08);
}
[data-aesthetic="playful"] .btn-primary {
  background: linear-gradient(180deg, var(--color-accent), var(--color-accent-dark));
}
[data-aesthetic="playful"] .btn-secondary {
  box-shadow: 0 3px 0 rgba(0,0,0,.06);
}
[data-aesthetic="playful"] .btn-icon {
  border-radius: 16px;
}
[data-aesthetic="playful"] .asq-q {
  font-size: 1.25rem;
  font-weight: 800;
}
[data-aesthetic="playful"] .asq-cat,
[data-aesthetic="playful"] .asq-diff-btn {
  border-radius: 999px;
  font-weight: 700;
}
[data-aesthetic="playful"] .asq-cat.active {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}
[data-aesthetic="playful"] .asq-diff-btn.active {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}
[data-aesthetic="playful"] .asq-diff-count {
  background: rgba(255,255,255,.5);
}
[data-aesthetic="playful"] .asq-answer {
  border-radius: 18px;
  border-width: 2px;
}
[data-aesthetic="playful"] .asq-answer:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 4px var(--color-accent-soft);
  outline: none;
}
[data-aesthetic="playful"] .pte-timer {
  border-radius: 999px;
  font-weight: 800;
}
[data-aesthetic="playful"] .skill-track {
  height: 16px;
  border-radius: 999px;
}
[data-aesthetic="playful"] .skill-fill {
  border-radius: 999px;
}
[data-aesthetic="playful"] .mic-btn {
  border-radius: 50%;
  animation: playful-pulse 1.8s ease-in-out infinite;
}
[data-aesthetic="playful"] .mic-btn.listening {
  animation: none;
  box-shadow: 0 0 0 8px rgba(220, 38, 38, .2);
}
@keyframes playful-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(79, 70, 229, .35); }
  50% { box-shadow: 0 0 0 12px rgba(79, 70, 229, 0); }
}
[data-aesthetic="playful"] .asq-result {
  border-radius: 18px;
  font-weight: 700;
}
[data-aesthetic="playful"] .asq-result.correct {
  background: linear-gradient(135deg, #dcfce7, #bbf7d0);
}
[data-aesthetic="playful"] .asq-result.wrong {
  background: linear-gradient(135deg, #fee2e2, #fecaca);
}
[data-aesthetic="playful"] .settings-panel {
  border-radius: 26px;
}
[data-aesthetic="playful"] .theme-swatch {
  border-radius: 12px;
  width: 42px;
  height: 42px;
}
[data-aesthetic="playful"] .aesthetic-btn {
  border-radius: 18px;
  font-weight: 700;
}
[data-aesthetic="playful"] .aesthetic-btn.active {
  background: linear-gradient(135deg, var(--color-accent), #ec4899);
  color: #fff;
  box-shadow: 0 4px 12px rgba(79, 70, 229, .3);
}

/* ---------- Aesthetic button base (shared) ---------- */
.settings-aesthetic {
  display: flex;
  gap: 8px;
  margin-top: 6px;
}
.aesthetic-btn {
  flex: 1;
  padding: 10px 14px;
  border: 2px solid var(--color-border);
  background: var(--color-card);
  border-radius: 10px;
  cursor: pointer;
  font-weight: 600;
  font-size: .9rem;
  transition: border-color .12s ease, background .12s ease, color .12s ease;
  font-family: inherit;
}
.aesthetic-btn:hover {
  border-color: var(--color-accent);
}