/* Design tokens (dataviz reference palette, validated on the dark surface) */
:root {
  color-scheme: dark;
  --page: #0d0d0d;
  --surface: #1a1a19;
  --surface-2: #232322;
  --ink: #ffffff;
  --ink-2: #c3c2b7;
  --ink-muted: #898781;
  --hairline: rgba(255, 255, 255, 0.10);
  --track: #2c2c2a;
  --accent: #3987e5;
  --accent-strong: #2a78d6;

  /* Rating status colors (always paired with an icon + text label) */
  --rate-excellent: #0ca30c;
  --rate-good: #3987e5;
  --rate-fair: #fab219;
  --rate-poor: #d03b3b;

  --radius: 16px;
  --radius-sm: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", "Hiragino Sans", "Noto Sans JP", sans-serif;
  background: var(--page);
  color: var(--ink);
  line-height: 1.7;
  font-size: 15px;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 24px 80px;
  position: relative;
}

/* ---------- Language switch ---------- */

.lang-switch {
  position: absolute;
  top: 20px;
  right: 24px;
  display: flex;
  gap: 2px;
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: 999px;
  padding: 3px;
}

.lang-switch button {
  border: none;
  background: transparent;
  color: var(--ink-muted);
  font-family: inherit;
  font-size: 0.78rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.lang-switch button:hover { color: var(--ink-2); }
.lang-switch button.active { background: var(--accent); color: #fff; }

/* ---------- Header ---------- */

header { text-align: center; margin-bottom: 36px; }

h1 {
  font-size: 1.85rem;
  letter-spacing: 0.01em;
  margin: 0 0 8px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

/* Invert the original dark-olive SVG so it reads on the dark background */
h1 .logo {
  height: 1.5em;
  width: auto;
  filter: invert(0.92) brightness(1.05);
}

.subtitle { color: var(--ink-2); margin: 0; font-size: 0.95rem; }

/* ---------- Cards ---------- */

.card {
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  padding: 28px 30px;
  margin-bottom: 20px;
}

.card h2 {
  font-size: 1.02rem;
  font-weight: 650;
  margin: 0 0 18px;
  display: flex;
  align-items: center;
  gap: 12px;
  letter-spacing: 0.01em;
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px; height: 24px;
  border-radius: 50%;
  background: var(--surface-2);
  border: 1px solid var(--hairline);
  color: var(--ink-2);
  font-size: 0.8rem;
  font-weight: 600;
  flex-shrink: 0;
}

/* ---------- Form ---------- */

.mic-row { display: flex; gap: 12px; flex-wrap: wrap; align-items: stretch; }

select {
  flex: 1;
  min-width: 260px;
  padding: 11px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--hairline);
  background: var(--surface-2);
  color: var(--ink);
  font-size: 0.92rem;
  font-family: inherit;
  outline: none;
  transition: border-color 0.15s;
}
select:focus-visible { border-color: var(--accent); }
select:disabled { color: var(--ink-muted); }

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 14px;
  font-size: 0.85rem;
  color: var(--ink-2);
  cursor: pointer;
  width: fit-content;
}
.checkbox-label input { accent-color: var(--accent); width: 15px; height: 15px; }

/* ---------- Buttons ---------- */

.btn {
  padding: 11px 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 0.92rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, transform 0.08s;
}
.btn:active:not(:disabled) { transform: scale(0.97); }
.btn:disabled { opacity: 0.35; cursor: not-allowed; }

.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover:not(:disabled) { background: var(--accent-strong); }
.btn-primary.recording { background: var(--rate-poor); animation: pulse 1.4s infinite; }

.btn-secondary {
  background: transparent;
  color: var(--ink-2);
  border-color: var(--hairline);
}
.btn-secondary:hover:not(:disabled) { background: var(--surface-2); color: var(--ink); }

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(208, 59, 59, 0.45); }
  50% { box-shadow: 0 0 0 12px rgba(208, 59, 59, 0); }
}

/* ---------- Recording ---------- */

.hint {
  font-size: 0.87rem;
  color: var(--ink-2);
  background: var(--surface-2);
  border: 1px solid var(--hairline);
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  margin: 0 0 16px;
}
.hint strong { color: var(--ink); }

.record-controls {
  display: flex;
  align-items: center;
  gap: 16px;
  margin: 0 0 14px;
}

.record-status { color: var(--ink-2); font-size: 0.88rem; min-height: 1.5em; }

#waveform {
  width: 100%;
  height: 180px;
  background: var(--page);
  border-radius: var(--radius-sm);
  border: 1px solid var(--hairline);
  display: block;
}

.level-meter {
  margin-top: 10px;
  height: 6px;
  background: var(--track);
  border-radius: 3px;
  overflow: hidden;
}

.level-bar {
  height: 100%;
  width: 0%;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--rate-excellent), var(--rate-excellent) 55%, var(--rate-fair) 78%, var(--rate-poor) 94%);
  transition: width 0.06s linear;
}

.hidden { display: none; }

.confetti {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 999;
}

/* ---------- Results: hero ---------- */

.overall-score {
  display: flex;
  align-items: center;
  gap: 32px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}

.score-ring {
  --p: 0;              /* score (0-100), set by JS */
  --ring: var(--accent);
  width: 148px;
  height: 148px;
  border-radius: 50%;
  background: conic-gradient(var(--ring) calc(var(--p) * 1%), var(--track) 0);
  display: grid;
  place-items: center;
  flex-shrink: 0;
}

.score-inner {
  width: calc(100% - 22px);
  height: calc(100% - 22px);
  border-radius: 50%;
  background: var(--surface);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0;
}

.score-inner .value {
  font-size: 2.9rem;
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.02em;
}
.score-inner small { color: var(--ink-muted); font-size: 0.78rem; }

.score-ring.excellent { --ring: var(--rate-excellent); }
.score-ring.good      { --ring: var(--rate-good); }
.score-ring.fair      { --ring: var(--rate-fair); }
.score-ring.poor      { --ring: var(--rate-poor); }

.overall-verdict { flex: 1; min-width: 260px; }
.verdict-label { font-size: 1.35rem; font-weight: 700; margin-bottom: 2px; }
.verdict-desc { color: var(--ink-2); font-size: 0.9rem; margin-bottom: 14px; }

.player-row {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}
#playback { height: 40px; flex: 1; min-width: 220px; max-width: 420px; }
.player-row .checkbox-label { margin-top: 0; }

/* ---------- Results: metrics ---------- */

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 14px;
  margin-bottom: 28px;
}

.metric-card {
  background: var(--surface-2);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
}

.metric-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 8px;
  margin-bottom: 10px;
}

.metric-name { font-weight: 650; font-size: 0.88rem; flex: 1; }

.metric-value-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 8px;
}
.metric-value { font-size: 0.98rem; font-weight: 650; letter-spacing: -0.01em; }
.metric-score { font-size: 0.78rem; color: var(--ink-muted); white-space: nowrap; flex-shrink: 0; }

.metric-bar-bg {
  height: 4px;
  background: var(--track);
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: 10px;
}
.metric-bar { height: 100%; border-radius: 2px; }
.metric-bar.excellent { background: var(--rate-excellent); }
.metric-bar.good      { background: var(--rate-good); }
.metric-bar.fair      { background: var(--rate-fair); }
.metric-bar.poor      { background: var(--rate-poor); }

.metric-note { font-size: 0.78rem; color: var(--ink-muted); line-height: 1.6; }

.badge {
  font-size: 0.72rem;
  padding: 3px 10px;
  border-radius: 999px;
  font-weight: 650;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}
.badge::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.badge.excellent { background: rgba(12, 163, 12, 0.14);  color: var(--rate-excellent); }
.badge.good      { background: rgba(57, 135, 229, 0.14); color: var(--rate-good); }
.badge.fair      { background: rgba(250, 178, 25, 0.14); color: var(--rate-fair); }
.badge.poor      { background: rgba(208, 59, 59, 0.16);  color: var(--rate-poor); }

/* ---------- Results: advice ---------- */

.advice-section h3 { font-size: 0.95rem; margin: 0 0 12px; }

#advice-list {
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
#advice-list li {
  background: var(--surface-2);
  border: 1px solid var(--hairline);
  border-left: 3px solid var(--rate-fair);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  font-size: 0.88rem;
  color: var(--ink-2);
}
#advice-list li.ok { border-left-color: var(--rate-excellent); }
#advice-list .advice-metric { font-weight: 650; color: var(--ink); }

/* ---------- Footer ---------- */

footer { margin-top: 36px; color: var(--ink-muted); font-size: 0.84rem; }

.footer-links { margin-top: 20px; text-align: center; }
.footer-links a {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--ink-muted);
  text-decoration: none;
  font-size: 0.82rem;
  transition: color 0.15s;
}
.footer-links a:hover { color: var(--ink-2); }
footer summary { cursor: pointer; }
footer summary:hover { color: var(--ink-2); }
#methodology { padding: 14px 4px; }
#methodology a { color: var(--accent); }
#methodology table { border-collapse: collapse; width: 100%; font-size: 0.78rem; }
#methodology th, #methodology td { border: 1px solid var(--track); padding: 7px 10px; text-align: left; vertical-align: top; }
#methodology th { color: var(--ink-2); background: var(--surface); }