:root {
  color-scheme: light dark;
  --page: #eef4f7;
  --surface: rgba(255, 255, 255, 0.88);
  --surface-strong: #ffffff;
  --text: #12202d;
  --muted: #687783;
  --line: rgba(18, 32, 45, 0.12);
  --accent: #0b75e5;
  --accent-strong: #005fc4;
  --success: #24a26a;
  --warning: #e49b20;
  --danger: #d64242;
  --shadow: 0 18px 55px rgba(21, 47, 70, 0.13);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Hiragino Sans", "Yu Gothic", sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
  margin: 0;
}

body {
  background:
    radial-gradient(circle at 15% 0%, rgba(45, 155, 255, 0.18), transparent 35%),
    var(--page);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  overscroll-behavior: none;
  overflow-x: hidden;
}

button,
select {
  font: inherit;
}

button {
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.app-shell {
  width: min(100%, 520px);
  min-height: 100svh;
  margin: 0 auto;
  padding:
    max(18px, env(safe-area-inset-top))
    max(16px, env(safe-area-inset-right))
    calc(198px + env(safe-area-inset-bottom))
    max(16px, env(safe-area-inset-left));
}

.app-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
}

.eyebrow,
.transcript-label,
.debug-title,
.mode-control span,
.language-controls label span {
  margin: 0;
  color: var(--muted);
  font-size: 0.7rem;
  font-weight: 750;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1 {
  margin: 3px 0 0;
  font-size: clamp(1.7rem, 8vw, 2.3rem);
  line-height: 1;
  letter-spacing: -0.04em;
}

.mode-control {
  display: grid;
  gap: 5px;
  min-width: 92px;
}

select {
  width: 100%;
  min-height: 44px;
  padding: 0 32px 0 11px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface-strong);
  color: var(--text);
}

.language-controls {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 44px minmax(0, 1fr);
  align-items: end;
  gap: 8px;
  margin-bottom: 14px;
}

.language-controls label {
  display: grid;
  gap: 5px;
}

.swap-button {
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--surface-strong);
  color: var(--accent);
  font-size: 1.25rem;
}

.transcript-card {
  display: grid;
  min-height: clamp(360px, 56svh, 560px);
  grid-template-rows: minmax(142px, 1fr) 32px minmax(142px, 1fr);
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--surface);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.transcript-block {
  min-height: 0;
  padding: 20px;
}

.translation-block {
  background: linear-gradient(145deg, rgba(11, 117, 229, 0.08), transparent 66%);
}

.transcript-text {
  max-height: 23svh;
  margin: 11px 0 0;
  overflow: auto;
  font-size: clamp(1.3rem, 6.4vw, 1.9rem);
  font-weight: 590;
  line-height: 1.42;
  overflow-wrap: anywhere;
  -webkit-overflow-scrolling: touch;
}

.transcript-text.translation {
  font-weight: 680;
}

.transcript-text.placeholder {
  color: var(--muted);
  font-size: 1rem;
  font-weight: 450;
}

.direction-arrow {
  display: grid;
  place-items: center;
  border-block: 1px solid var(--line);
  color: var(--accent);
  font-size: 1.2rem;
}

.error-message {
  margin-top: 12px;
  padding: 12px 14px;
  border: 1px solid color-mix(in srgb, var(--danger) 45%, transparent);
  border-radius: 14px;
  background: color-mix(in srgb, var(--danger) 10%, var(--surface));
  color: var(--danger);
  font-size: 0.88rem;
  line-height: 1.45;
}

.debug-panel {
  margin-top: 12px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #07111f;
  color: #c9f4df;
}

.debug-panel pre {
  margin: 8px 0 0;
  overflow-x: auto;
  font: 0.75rem/1.6 ui-monospace, SFMono-Regular, Menlo, monospace;
  white-space: pre-wrap;
}

.control-dock {
  position: fixed;
  z-index: 5;
  right: 0;
  bottom: 0;
  left: 0;
  width: min(100%, 520px);
  margin: 0 auto;
  padding: 12px max(16px, env(safe-area-inset-right)) max(10px, env(safe-area-inset-bottom)) max(16px, env(safe-area-inset-left));
  border-top: 1px solid var(--line);
  background: color-mix(in srgb, var(--surface-strong) 88%, transparent);
  box-shadow: 0 -12px 40px rgba(21, 47, 70, 0.09);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.status {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 24px;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 700;
}

.status-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: currentColor;
}

.status[data-state="listening"] {
  color: var(--success);
}

.status[data-state="translating"],
.status[data-state="connecting"] {
  color: var(--warning);
}

.status[data-state="speaking"] {
  color: var(--accent);
}

.status[data-state="error"] {
  color: var(--danger);
}

.status[data-state="listening"] .status-dot,
.status[data-state="speaking"] .status-dot {
  animation: pulse 1.4s infinite;
}

.primary-button {
  width: 100%;
  min-height: 58px;
  border: 0;
  border-radius: 18px;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  box-shadow: 0 10px 24px rgba(11, 117, 229, 0.28);
  color: #fff;
  font-size: 1.08rem;
  font-weight: 760;
}

.cost-summary {
  display: grid;
  grid-template-columns: auto auto;
  align-items: baseline;
  justify-content: center;
  gap: 1px 8px;
  min-height: 35px;
  margin: -2px 0 8px;
  color: var(--muted);
  font-size: 0.7rem;
}

.cost-summary strong {
  color: var(--text);
  font-size: 0.95rem;
  font-variant-numeric: tabular-nums;
}

.cost-detail {
  grid-column: 1 / -1;
  text-align: center;
}

.primary-button[data-running="true"] {
  background: linear-gradient(135deg, #344558, #1f2d3b);
  box-shadow: none;
}

.primary-button:disabled,
button:disabled,
select:disabled {
  opacity: 0.55;
}

.route-note {
  margin: 7px 0 0;
  color: var(--muted);
  font-size: 0.65rem;
  text-align: center;
}

@keyframes pulse {
  0%,
  100% {
    box-shadow: 0 0 0 0 currentColor;
  }
  50% {
    box-shadow: 0 0 0 5px transparent;
  }
}

@media (max-width: 350px) {
  .app-shell {
    padding-inline: 10px;
  }

  .app-header {
    margin-bottom: 12px;
  }

  .transcript-block {
    padding: 16px;
  }

  .control-dock {
    padding-inline: 10px;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --page: #07111f;
    --surface: rgba(16, 30, 45, 0.9);
    --surface-strong: #132337;
    --text: #eff7ff;
    --muted: #91a2b3;
    --line: rgba(220, 237, 255, 0.12);
    --accent: #4aa6ff;
    --accent-strong: #197ad7;
    --shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}