:root {
  --ms-blue: #0078d4;
  --ms-blue-dark: #005a9e;
  --ms-blue-light: #e8f1fb;
  --bg-top: #eef5fc;
  --bg-bottom: #fafafa;
  --surface: #ffffff;
  --border: #e1dfdd;
  --text-primary: #1f2226;
  --text-secondary: #5b6168;
  --text-tertiary: #8a8886;
  --success: #107c10;
  --success-light: #e6f4e6;
  --danger: #d13438;
  --danger-light: #fdecea;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.06), 0 1px 1px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 10px 28px rgba(15, 60, 100, 0.1);
  --shadow-lg: 0 24px 60px rgba(15, 60, 100, 0.16);
  --font: "Segoe UI", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font);
  background: linear-gradient(180deg, var(--bg-top) 0%, var(--bg-bottom) 420px);
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
  position: relative;
  min-height: 100vh;
}

.bg-glow {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(620px circle at 18% 12%, rgba(0, 120, 212, 0.12), transparent 60%),
    radial-gradient(560px circle at 85% 18%, rgba(0, 120, 212, 0.08), transparent 60%);
}

/* App bar */

.app-bar {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.app-bar-inner {
  max-width: 1360px;
  margin: 0 auto;
  padding: 1.1rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--ms-blue) 0%, var(--ms-blue-dark) 100%);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 4px 10px rgba(0, 90, 158, 0.35);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.3;
}

.brand-title {
  font-size: 1.18rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.brand-subtitle {
  font-size: 0.83rem;
  color: var(--text-secondary);
}

.badge {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--ms-blue-dark);
  background: var(--ms-blue-light);
  padding: 0.35rem 0.8rem;
  border-radius: 999px;
  letter-spacing: 0.02em;
}

/* Layout */

.container {
  position: relative;
  z-index: 1;
  max-width: 1360px;
  margin: 0 auto;
  padding: 2.25rem 2rem 3rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s ease;
}

/* Translator bar */

.translator-bar {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 1.4rem 1.75rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  box-shadow: var(--shadow-md);
}

.lang-control {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.lang-control label {
  font-size: 0.74rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-tertiary);
  padding-left: 0.2rem;
}

select {
  font-family: var(--font);
  font-size: 1rem;
  font-weight: 600;
  padding: 0.65rem 2.3rem 0.65rem 1.15rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: #f7f7f6 url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath fill='%23616161' d='M4 6l4 4 4-4'/%3E%3C/svg%3E") no-repeat right 0.9rem center;
  background-size: 11px;
  color: var(--text-primary);
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  min-width: 168px;
  transition: border-color 0.15s ease, background-color 0.15s ease;
}

select:hover {
  border-color: var(--ms-blue);
  background-color: #fff;
}

select:disabled {
  cursor: not-allowed;
  opacity: 0.6;
}

select:focus-visible,
button:focus-visible {
  outline: 2px solid var(--ms-blue);
  outline-offset: 2px;
}

.auto-detect-note {
  font-size: 0.82rem;
  color: var(--text-tertiary);
  font-style: italic;
}

.segmented {
  display: flex;
  background: #f3f2f1;
  border-radius: 999px;
  padding: 3px;
  gap: 2px;
}

.segment {
  font-family: var(--font);
  border: none;
  background: transparent;
  padding: 0.55rem 0.95rem;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  white-space: nowrap;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.segment.active {
  background: var(--surface);
  color: var(--ms-blue-dark);
  box-shadow: var(--shadow-sm);
}

.translator-actions {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  margin-left: auto;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font);
  font-size: 0.92rem;
  font-weight: 600;
  padding: 0.65rem 1.3rem;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color 0.15s ease, transform 0.05s ease, box-shadow 0.15s ease;
}

.btn:active {
  transform: translateY(1px);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--ms-blue);
  color: #fff;
  box-shadow: 0 4px 10px rgba(0, 120, 212, 0.35);
}

.btn-primary:hover:not(:disabled) {
  background: var(--ms-blue-dark);
}

.btn-secondary {
  background: var(--surface);
  color: var(--text-primary);
  border-color: var(--border);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--danger-light);
  border-color: var(--danger);
  color: var(--danger);
}

.status-pill {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.45rem 0.95rem;
  border-radius: 999px;
  background: #f3f2f1;
  color: var(--text-secondary);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-tertiary);
}

.status-pill[data-state="listening"] {
  background: var(--success-light);
  color: var(--success);
}
.status-pill[data-state="listening"] .status-dot {
  background: var(--success);
  animation: pulse 1.6s infinite;
}

.status-pill[data-state="connecting"] {
  background: var(--ms-blue-light);
  color: var(--ms-blue-dark);
}
.status-pill[data-state="connecting"] .status-dot {
  background: var(--ms-blue);
  animation: pulse 1s infinite;
}

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

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 currentColor; opacity: 1; }
  70% { box-shadow: 0 0 0 6px transparent; opacity: 0.6; }
  100% { box-shadow: 0 0 0 0 transparent; opacity: 1; }
}

/* Feature strip */

.feature-strip {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}

.feature-chip {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid var(--border);
  padding: 0.45rem 0.95rem;
  border-radius: 999px;
}

/* Hero caption card */

.hero-card {
  padding: 2.25rem 2.5rem;
  margin-bottom: 1.5rem;
  background: linear-gradient(165deg, #ffffff 0%, var(--ms-blue-light) 130%);
  box-shadow: var(--shadow-lg);
  border-color: #d8e9f9;
}

.hero-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}

.hero-heading {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.hero-label {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-tertiary);
}

.live-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--danger);
  background: var(--danger-light);
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  opacity: 0;
  transform: translateY(-2px);
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.live-badge.show {
  opacity: 1;
  transform: translateY(0);
}

.live-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--danger);
  animation: pulse 1.4s infinite;
}

.hero-body {
  min-height: 140px;
  display: flex;
  align-items: center;
}

.latest-caption {
  width: 100%;
  transition: opacity 0.25s ease;
}

.latest-translated {
  margin: 0;
  font-size: 2.6rem;
  font-weight: 700;
  line-height: 1.3;
  color: var(--ms-blue-dark);
  letter-spacing: -0.01em;
}

.latest-translated.placeholder {
  font-size: 1.35rem;
  font-weight: 400;
  font-style: italic;
  color: var(--text-tertiary);
}

.latest-original {
  margin: 0.75rem 0 0;
  font-size: 1.1rem;
  color: var(--text-secondary);
}

/* Stage (secondary detail row) */

.stage {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

@media (max-width: 900px) {
  .stage {
    grid-template-columns: 1fr;
  }
  .translator-actions {
    margin-left: 0;
  }
  .latest-translated {
    font-size: 1.9rem;
  }
  .hero-card {
    padding: 1.75rem;
  }
}

@media (max-width: 600px) {
  .app-bar-inner {
    padding: 0.85rem 1rem;
  }
  .brand-subtitle {
    display: none;
  }
  .badge {
    display: none;
  }

  .container {
    padding: 1.25rem 1rem 2rem;
  }

  .translator-bar {
    flex-direction: column;
    align-items: stretch;
    padding: 1.1rem 1.1rem;
    gap: 1rem;
  }
  .lang-control {
    width: 100%;
  }
  select {
    width: 100%;
    min-width: 0;
  }
  .segmented {
    width: 100%;
  }
  .segment {
    flex: 1;
    text-align: center;
  }
  .auto-detect-note {
    order: 10;
  }
  .translator-actions {
    width: 100%;
    margin-left: 0;
  }
  .btn {
    flex: 1;
    justify-content: center;
  }
  .status-pill {
    align-self: flex-start;
  }

  .hero-card {
    padding: 1.25rem;
  }
  .hero-header {
    flex-wrap: wrap;
    gap: 0.6rem;
  }
  .latest-translated {
    font-size: 1.45rem;
  }
  .latest-original {
    font-size: 0.95rem;
  }

  .pane-header {
    padding: 0.75rem 0.9rem;
  }
  .pane-body {
    padding: 0.9rem;
  }
}

.pane {
  display: flex;
  flex-direction: column;
  min-height: 230px;
  overflow: hidden;
}

.pane:hover {
  box-shadow: var(--shadow-md);
}

.pane-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem 1.15rem;
  border-bottom: 1px solid var(--border);
}

.pane-title {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-primary);
}

.pane-tag {
  font-size: 0.74rem;
  font-weight: 600;
  color: var(--ms-blue-dark);
  background: var(--ms-blue-light);
  padding: 0.18rem 0.6rem;
  border-radius: 999px;
}

.rec-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-tertiary);
  flex-shrink: 0;
}

.rec-dot.active {
  background: var(--danger);
  animation: pulse 1.4s infinite;
}

.pane-body {
  padding: 1.15rem;
  flex: 1;
  overflow-y: auto;
}

.partial-text {
  margin: 0;
  font-size: 1.15rem;
  line-height: 1.5;
  color: var(--text-secondary);
  font-style: italic;
}

/* Conversation history */

.caption-history {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.caption-row {
  padding: 0.6rem 0.75rem;
  border-radius: var(--radius-sm);
  border-bottom: 1px solid var(--border);
  animation: slide-in 0.25s ease;
}

.caption-row .translated {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
}

.caption-row .original {
  font-size: 0.78rem;
  color: var(--text-tertiary);
  margin-top: 0.15rem;
}

@keyframes slide-in {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Speaking indicator (equalizer bars) */

.speaking-indicator {
  display: flex;
  align-items: flex-end;
  gap: 4px;
  height: 22px;
  opacity: 0;
  transition: opacity 0.2s ease;
}

.speaking-indicator.active {
  opacity: 1;
}

.speaking-indicator span {
  width: 4px;
  background: var(--ms-blue);
  border-radius: 2px;
  animation: eq 0.9s ease-in-out infinite;
}

.speaking-indicator span:nth-child(1) { height: 40%; animation-delay: 0s; }
.speaking-indicator span:nth-child(2) { height: 100%; animation-delay: 0.2s; }
.speaking-indicator span:nth-child(3) { height: 65%; animation-delay: 0.4s; }

@keyframes eq {
  0%, 100% { transform: scaleY(0.4); }
  50% { transform: scaleY(1); }
}