:root {
  --bg:     #0a0f1e;
  --surf:   #111827;
  --surf2:  #0d1424;
  --border: #1f2d45;
  --text:   #e2e8f0;
  --muted:  #4b6080;
  --accent: #6366f1;
  --accent2:#38bdf8;
  --good:   #22c55e;
  --warn:   #f59e0b;
  --bad:    #ef4444;
  --primary:#6366f1;
  --phover: #4f46e5;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

.app {
  max-width: 780px;
  margin: 0 auto;
  padding: 48px 20px 100px;
}

/* ── Header ──────────────────────────────────────────────────────────────── */
header {
  text-align: center;
  margin-bottom: 36px;
}
header h1 {
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.4px;
}
header p {
  color: var(--muted);
  margin-top: 6px;
  font-size: 14px;
}

/* ── Card ────────────────────────────────────────────────────────────────── */
.card {
  background: var(--surf);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
  margin-bottom: 14px;
}

/* ── Input section ───────────────────────────────────────────────────────── */
.input-card label {
  display: block;
  font-size: 12px;
  font-weight: 700;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}
textarea {
  width: 100%;
  background: var(--surf2);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font-size: 15px;
  font-family: inherit;
  padding: 12px 14px;
  resize: vertical;
  transition: border-color .15s;
}
textarea:focus { outline: none; border-color: var(--accent); }

.controls {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 14px;
  flex-wrap: wrap;
}
.timer {
  font-family: monospace;
  font-size: 13px;
  color: var(--muted);
  min-width: 44px;
}

/* ── Buttons ─────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 9px 18px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: background .15s, transform .1s, opacity .15s;
}
.btn:active:not(:disabled) { transform: scale(0.96); }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }

.btn-primary {
  background: var(--surf2);
  border: 1px solid var(--border);
  color: var(--text);
}
.btn-primary:hover:not(:disabled) { border-color: var(--accent); color: var(--text); }
.btn-primary.recording { border-color: var(--bad); color: var(--bad); animation: pulse 1s infinite; }

.btn-secondary {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
}
.btn-secondary:hover { border-color: var(--accent); color: var(--text); }

.btn-accent {
  background: var(--accent);
  color: #fff;
  margin-left: auto;
}
.btn-accent:hover:not(:disabled) { background: var(--phover); }

audio { width: 100%; margin-top: 14px; }
[hidden] { display: none !important; }

.status {
  margin-top: 10px;
  font-size: 13px;
  color: var(--muted);
  min-height: 18px;
}
.status.error { color: var(--bad); }

/* ── Banner ──────────────────────────────────────────────────────────────── */
.banner {
  display: flex;
  align-items: center;
  gap: 10px;
  background: #1e1b4b;
  border: 1px solid #3730a3;
  border-radius: 10px;
  padding: 12px 16px;
  margin-bottom: 14px;
  font-size: 14px;
  color: #a5b4fc;
}

/* ── Metrics grid ────────────────────────────────────────────────────────── */
.metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 14px;
}
@media (max-width: 560px) { .metrics { grid-template-columns: repeat(2, 1fr); } }

.metric {
  background: var(--surf);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px 14px;
  text-align: center;
}
.m-val {
  font-size: 30px;
  font-weight: 800;
  color: var(--accent2);
  line-height: 1;
}
.m-lbl {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-top: 6px;
}
.m-sub {
  font-size: 11px;
  color: var(--muted);
  opacity: 0.5;
  margin-top: 2px;
}

/* ── Card headings ───────────────────────────────────────────────────────── */
.card h3 {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
  margin-bottom: 14px;
}

/* ── Transcript ──────────────────────────────────────────────────────────── */
.transcript-box {
  font-size: 18px;
  line-height: 2.2;
  word-spacing: 2px;
}
.transcript-box .w {
  display: inline-block;
  padding: 2px 7px;
  border-radius: 6px;
  margin: 2px 1px;
  font-weight: 500;
  transition: background .2s;
}
.w.match { color: var(--good); }
.w.sub   { color: var(--warn); border-bottom: 2px solid var(--warn); }
.w.miss  { color: var(--bad); text-decoration: line-through; opacity: 0.7; }

/* ── Word cards ──────────────────────────────────────────────────────────── */
.word-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.wc {
  background: var(--surf2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 16px;
  min-width: 120px;
}
.wc-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
}
.wc-word {
  font-size: 15px;
  font-weight: 700;
}
.badge {
  font-size: 12px;
  font-weight: 700;
  padding: 2px 9px;
  border-radius: 20px;
}
.badge.good { background: #14532d40; color: #4ade80; border: 1px solid #166534; }
.badge.warn { background: #78350f40; color: #fbbf24; border: 1px solid #92400e; }
.badge.bad  { background: #450a0a40; color: #f87171; border: 1px solid #7f1d1d; }

.wc-phonemes {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 4px;
}
.ph {
  text-align: center;
  min-width: 20px;
}
.ph-letter {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
}
.ph-ipa {
  font-size: 11px;
  color: var(--muted);
  font-family: Georgia, "Noto Serif", serif;
  margin-top: 1px;
}
.ph.good .ph-letter { color: var(--good); }
.ph.warn .ph-letter, .ph.warning .ph-letter { color: var(--warn); }
.ph.bad  .ph-letter { color: var(--bad); }

/* MDD phoneme detail */
.mdd-row {
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-wrap: wrap;
  gap: 3px;
  font-family: Georgia, serif;
  font-size: 12px;
  letter-spacing: 0.04em;
}

/* ── Score bars ──────────────────────────────────────────────────────────── */
.score-bars {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.score-row {
  display: flex;
  align-items: center;
  gap: 12px;
}
.s-lbl {
  width: 110px;
  font-size: 13px;
  color: var(--muted);
  flex-shrink: 0;
}
.s-track {
  flex: 1;
  height: 7px;
  background: var(--surf2);
  border-radius: 10px;
  overflow: hidden;
}
.s-fill {
  height: 100%;
  border-radius: 10px;
  transition: width .7s cubic-bezier(.4,0,.2,1);
}
.s-num {
  font-size: 13px;
  font-weight: 700;
  width: 36px;
  text-align: right;
  color: var(--text);
}

/* ── Feedback ────────────────────────────────────────────────────────────── */
.feedback-list {
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.9;
  color: var(--muted);
}
.feedback-list li { margin-bottom: 2px; }
.feedback-list li::marker { color: var(--accent); }

/* ── Animations ──────────────────────────────────────────────────────────── */
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.5; }
}
.spinner {
  width: 15px; height: 15px;
  border: 2px solid #3730a3;
  border-top-color: #a5b4fc;
  border-radius: 50%;
  animation: spin .7s linear infinite;
  flex-shrink: 0;
}
@keyframes spin { to { transform: rotate(360deg); } }