:root {
  --bg: #091017;
  --bg-2: #111d2a;
  --panel: rgba(14, 22, 31, 0.88);
  --card: rgba(18, 29, 41, 0.92);
  --line: rgba(168, 193, 214, 0.18);
  --ink: #eef5fc;
  --muted: #95a8bc;
  --teal: #47d9bf;
  --blue: #6aa8ff;
  --shadow: 0 22px 80px rgba(0, 0, 0, 0.32);
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  font-family: "Segoe UI", "Noto Sans TC", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(71, 217, 191, 0.16), transparent 28%),
    radial-gradient(circle at top right, rgba(106, 168, 255, 0.16), transparent 30%),
    linear-gradient(165deg, var(--bg), var(--bg-2));
}

button, select, textarea, input { font: inherit; }
a { color: inherit; text-decoration: none; }

button {
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 12px 18px;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.04);
  cursor: pointer;
}

button.primary {
  background: linear-gradient(135deg, var(--teal), var(--blue));
  color: #041017;
  font-weight: 700;
}

button.danger {
  background: linear-gradient(135deg, #ff9b6a, #ff5757);
  color: #ffffff;
}

button.ghost {
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.03);
}

select, textarea, input {
  width: 100%;
  padding: 12px 14px;
  margin-top: 8px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: rgba(7, 13, 19, 0.74);
  color: var(--ink);
}

.feature-shell {
  max-width: 1440px;
  margin: 0 auto;
  padding: 28px;
  display: grid;
  gap: 22px;
}

.feature-hero,
.feature-panel,
.stack-card {
  border: 1px solid var(--line);
  border-radius: 28px;
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}

.feature-hero {
  padding: 28px;
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 24px;
}

.back-link {
  display: inline-flex;
  margin-bottom: 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 10px 14px;
  background: rgba(255,255,255,0.04);
}

.eyebrow,
.section-kicker,
.panel-label {
  margin: 0 0 8px;
  color: var(--teal);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1, h2, h3 { margin: 0; }
.lead { color: var(--muted); line-height: 1.7; font-size: 1.06rem; }

.status-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.status-card {
  border-radius: 20px;
  border: 1px solid var(--line);
  background: rgba(5, 12, 18, 0.74);
  padding: 16px 18px;
}

.status-card span {
  display: block;
  color: var(--muted);
  margin-bottom: 8px;
}

.feature-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(320px, 420px);
  gap: 20px;
}

.feature-panel {
  padding: 18px;
}

.main-panel {
  display: grid;
  gap: 16px;
}

.side-panel {
  display: grid;
  gap: 16px;
  background: transparent;
  border: none;
  box-shadow: none;
  padding: 0;
}

.stack-card {
  padding: 18px;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
}

.action-row,
.preset-list {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.preview-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: rgba(5, 12, 18, 0.74);
}

.preview-toolbar-copy {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.media-actions {
  justify-content: flex-end;
}

.featured-card,
.result-card {
  border-radius: 20px;
  border: 1px solid var(--line);
  background: var(--card);
  padding: 16px;
}

.featured-response {
  min-height: 160px;
  white-space: pre-wrap;
  line-height: 1.75;
  font-size: 1.06rem;
}

.thinking-strip,
.health-box {
  border-radius: 16px;
  border: 1px solid var(--line);
  background: rgba(5, 12, 18, 0.74);
  padding: 14px 16px;
  color: var(--muted);
  white-space: pre-wrap;
}

.chat-log {
  min-height: 280px;
  max-height: 460px;
  overflow: auto;
  display: grid;
  gap: 12px;
}

.voice-runtime-card strong {
  color: #ffffff;
}

.message {
  border-radius: 18px;
  border: 1px solid var(--line);
  padding: 14px 16px;
  white-space: pre-wrap;
  line-height: 1.6;
}

.message.user { background: rgba(71, 217, 191, 0.08); }
.message.assistant { background: rgba(106, 168, 255, 0.08); }

.chat-form { display: grid; gap: 12px; }
.chat-form button { justify-self: end; }

.vision-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.media-pane {
  min-height: 360px;
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: #04090d;
  position: relative;
}

video, img, canvas {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
  display: block;
}

.media-pane > video,
.media-pane > img,
.media-pane > canvas {
  position: absolute;
  inset: 0;
}

canvas {
  background: #04090d;
}

.webcam-source-video {
  opacity: 0.01;
  pointer-events: none;
}

.overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 24px;
  color: var(--muted);
  text-align: center;
  background: rgba(4, 9, 13, 0.64);
}

.result-box {
  min-height: 140px;
  white-space: pre-wrap;
  color: var(--muted);
  line-height: 1.65;
}

#sceneResult {
  min-height: 220px;
}

.result-summary {
  display: inline-block;
  margin-bottom: 10px;
  color: #ffffff;
  font-weight: 800;
}

.runtime-card {
  margin-top: 12px;
  padding: 14px;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: rgba(5, 12, 18, 0.74);
}

.runtime-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.runtime-row span:first-child {
  color: var(--muted);
}

.runtime-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 10px;
}

.runtime-status {
  color: var(--muted);
  line-height: 1.6;
  white-space: pre-wrap;
}

#liveTranscript {
  min-height: 88px;
  font-size: 1.02rem;
}

.result-metric {
  display: inline-block;
  color: #ffffff;
  font-weight: 800;
}

.preset {
  text-align: left;
  width: 100%;
  border-radius: 18px;
  border-color: var(--line);
}

.detail-list {
  margin: 0;
  padding-left: 20px;
  color: var(--muted);
  line-height: 1.65;
}

label {
  display: block;
  color: var(--muted);
  margin-top: 10px;
}

.yolo-grid {
  align-items: start;
}

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

.tab-button {
  border-color: var(--line);
}

.tab-button.is-active {
  background: linear-gradient(135deg, var(--teal), var(--blue));
  color: #041017;
  font-weight: 700;
}

.source-panel {
  border-radius: 20px;
}

.input-hint {
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.6;
}

.media-preview-grid {
  grid-template-columns: 1fr 1fr;
}

.preview-head {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  z-index: 2;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 14px;
  background: linear-gradient(180deg, rgba(4, 9, 13, 0.94), rgba(4, 9, 13, 0.12));
  color: var(--ink);
  font-size: 0.9rem;
}

@media (max-width: 1080px) {
  .feature-hero,
  .feature-grid,
  .vision-layout {
    grid-template-columns: 1fr;
  }

  .preview-toolbar {
    align-items: stretch;
    flex-direction: column;
  }
}