:root {
  --color-background: #ffffff;
  --color-foreground: #0a0a0a;
  --color-primary: #1447e6;
  --color-primary-foreground: #eff6ff;
  --color-primary-hover: #123ec9;
  --color-primary-soft: #eff6ff;
  --color-primary-soft-hover: #dbeafe;
  --color-muted-foreground: #525252;
  --color-subtle-foreground: #404040;
  --color-border: #e5e7eb;
  --color-border-strong: #d4d4d8;
  --color-surface-subtle: #fafafa;
  --color-surface-muted: #f4f4f5;
  --color-error: #b91c1c;
  --color-error-soft: #fee2e2;
  --color-good: #166534;
  --color-good-soft: #dcfce7;
  --color-close: #92400e;
  --color-close-soft: #fef3c7;
  --color-needs-work: #b91c1c;
  --color-needs-work-soft: #fee2e2;
  --color-recording: #c94853;
  --color-recording-shadow: rgba(201, 72, 83, .2);
  --color-on-primary-muted: rgba(239, 246, 255, .8);
  color: var(--color-foreground);
  background: transparent;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html,
body {
  width: 100%;
  min-height: 100%;
  margin: 0;
  min-width: 280px;
  background: transparent;
}

button { font: inherit; }

.demo-shell {
  width: 100%;
  margin: 0 auto;
  padding: 18px 14px 14px;
}

.demo-card {
  width: 100%;
  overflow: hidden;
  padding: clamp(20px, 5vw, 32px);
  border: 1px solid var(--color-border);
  border-radius: 22px;
  background: rgba(255, 255, 255, .98);
}

.result-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--color-primary);
  font-size: .72rem;
  font-weight: 800;
  letter-spacing: .12em;
  text-transform: uppercase;
}

h2 { margin: 0; color: var(--color-foreground); line-height: 1.14; }
h2 { font-size: 1.05rem; }

.prompt-heading { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 8px; }
.field-label { margin: 0; font-size: .83rem; font-weight: 750; }
.change-button {
  border: 0;
  padding: 4px 0;
  color: var(--color-primary);
  background: transparent;
  cursor: pointer;
  font-size: .75rem;
  font-weight: 750;
}
.change-button:hover:not(:disabled) { text-decoration: underline; }
.change-button:focus-visible { outline: 3px solid var(--color-primary); outline-offset: 3px; }
.change-button:disabled { cursor: not-allowed; opacity: .48; }

.prompt-card {
  min-height: 116px;
  padding: 16px;
  border: 1px solid var(--color-border-strong);
  border-radius: 12px;
  background: var(--color-surface-subtle);
}
.sentence-text { margin: 0; color: var(--color-foreground); font-size: 1.08rem; font-weight: 700; line-height: 1.55; }
.reference-ipa { margin: 10px 0 0; color: var(--color-muted-foreground); font-size: .84rem; line-height: 1.45; overflow-wrap: anywhere; }
.reviewed-word { border-radius: 4px; padding: 1px 2px; box-decoration-break: clone; -webkit-box-decoration-break: clone; }
.word-good { color: var(--color-good); background: var(--color-good-soft); }
.word-close { color: var(--color-close); background: var(--color-close-soft); }
.word-needs-work { color: var(--color-needs-work); background: var(--color-needs-work-soft); }
.word-unrated { color: var(--color-subtle-foreground); background: var(--color-surface-muted); }
.word-legend { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 13px; padding-top: 10px; border-top: 1px solid var(--color-border); }
.word-legend span { display: inline-flex; align-items: center; gap: 5px; color: var(--color-muted-foreground); font-size: .67rem; font-weight: 700; }
.legend-dot { width: 7px; height: 7px; border-radius: 50%; }
.legend-dot.is-good { background: var(--color-good); }
.legend-dot.is-close { background: var(--color-close); }
.legend-dot.needs-work { background: var(--color-needs-work); }

.field-hint { margin: 7px 0 18px; color: var(--color-muted-foreground); font-size: .75rem; }

.controls { display: flex; flex-wrap: wrap; gap: 10px; }

.button {
  min-height: 44px;
  border: 0;
  border-radius: 11px;
  padding: 11px 15px;
  cursor: pointer;
  font-size: .88rem;
  font-weight: 750;
  transition: transform .16s ease, box-shadow .16s ease, background .16s ease;
}

.button:focus-visible, .cta:focus-visible { outline: 3px solid var(--color-primary); outline-offset: 2px; }
.button:not(:disabled):hover { transform: translateY(-1px); }
.button:disabled { cursor: not-allowed; opacity: .48; }

.button-primary { display: inline-flex; align-items: center; gap: 9px; color: var(--color-primary-foreground); background: var(--color-primary); box-shadow: 0 8px 16px rgba(20, 71, 230, .22); }
.button-primary:hover:not(:disabled) { background: var(--color-primary-hover); }
.button-primary.is-recording { background: var(--color-recording); box-shadow: 0 8px 16px var(--color-recording-shadow); }
.button-secondary { color: var(--color-primary); border: 1px solid var(--color-border-strong); background: var(--color-primary-soft); }
.button-secondary:hover:not(:disabled) { background: var(--color-primary-soft-hover); }

.record-dot { width: 9px; height: 9px; border-radius: 50%; background: currentColor; }
.is-recording .record-dot { animation: pulse 1.2s ease-in-out infinite; }
.timer { min-width: 34px; color: var(--color-on-primary-muted); font-variant-numeric: tabular-nums; }

.status { min-height: 22px; margin: 14px 0 0; color: var(--color-muted-foreground); font-size: .8rem; line-height: 1.45; }
.status.is-error { color: var(--color-error); }
.status.is-busy { color: var(--color-primary); }

.result { margin-top: 21px; padding-top: 20px; border-top: 1px solid var(--color-border); }
.score { display: flex; align-items: baseline; color: var(--color-primary); font-size: 2rem; font-weight: 800; line-height: 1; }
.score small { margin-left: 2px; font-size: .9rem; }

.feedback { display: grid; gap: 10px; margin: 18px 0; }
.feedback div { padding: 11px 12px; border-radius: 10px; background: var(--color-surface-muted); }
.feedback dt { margin-bottom: 4px; color: var(--color-muted-foreground); font-size: .68rem; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.feedback dd { margin: 0; color: var(--color-foreground); font-size: .88rem; line-height: 1.4; overflow-wrap: anywhere; }
.retry-button { width: 100%; }

.cta { display: block; margin-top: 17px; color: var(--color-primary); font-size: .82rem; font-weight: 750; text-align: center; text-decoration: none; }
.cta:hover { text-decoration: underline; }
.privacy-note { margin: 11px 0 0; color: var(--color-muted-foreground); font-size: .68rem; text-align: center; }

@keyframes pulse { 50% { opacity: .35; transform: scale(.72); } }

@media (max-width: 390px) {
  .demo-card { padding: 20px 17px; }
  .controls .button { width: 100%; justify-content: center; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}