:root {
  --bg-start: #040915;
  --bg-end: #091528;
  --panel: rgba(7, 17, 34, 0.72);
  --panel-strong: rgba(8, 20, 40, 0.92);
  --border: rgba(154, 214, 255, 0.18);
  --text: #eef8ff;
  --muted: #8fb3d8;
  --accent: #7ee6ff;
  --accent-2: #74a2ff;
  --danger: #ff9e9e;
}

* {
  box-sizing: border-box;
}

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

body {
  min-height: 100vh;
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top, rgba(96, 182, 255, 0.16), transparent 28%),
    radial-gradient(circle at 70% 80%, rgba(0, 230, 255, 0.12), transparent 24%),
    linear-gradient(180deg, var(--bg-start) 0%, var(--bg-end) 100%);
  overflow: hidden;
}

.screen-shell {
  min-height: 100vh;
  padding: 24px 28px 28px;
  display: grid;
  grid-template-rows: auto 1fr auto auto;
  gap: 18px;
}

.topbar,
.conversation-strip,
.controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.topbar-chips,
.sample-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.eyebrow {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: 0.32em;
  color: var(--muted);
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  font-size: 30px;
}

.session-line,
.footnote {
  color: var(--muted);
  font-size: 13px;
}

.status-chip,
.panel-card,
.subtitle-card,
.response-card,
.avatar-shell,
button {
  border: 1px solid var(--border);
  background: var(--panel);
  backdrop-filter: blur(20px);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.05),
    0 20px 50px rgba(0, 0, 0, 0.28);
}

.status-chip {
  padding: 10px 16px;
  border-radius: 999px;
  color: var(--accent);
  font-size: 14px;
}

.status-chip.secondary {
  color: var(--muted);
}

.hero {
  display: grid;
  grid-template-columns: 1fr minmax(560px, 1.35fr) 1fr;
  gap: 20px;
  align-items: center;
}

.deco-panel {
  min-height: 560px;
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 18px;
  justify-content: center;
}

.panel-card,
.subtitle-card,
.response-card {
  border-radius: 24px;
  padding: 22px;
}

.panel-card.compact {
  min-height: 136px;
}

.panel-card h2 {
  margin-bottom: 8px;
  font-size: 22px;
}

.panel-card p,
.subtitle-card p,
.response-card p {
  color: var(--muted);
  line-height: 1.7;
}

.secondary-line {
  margin-top: 10px;
  color: rgba(171, 214, 255, 0.88);
  font-size: 13px;
}

.avatar-stage {
  min-height: 680px;
  position: relative;
  display: grid;
  place-items: center;
}

.avatar-halo {
  position: absolute;
  width: 700px;
  height: 700px;
  border-radius: 50%;
  background:
    radial-gradient(circle, rgba(126, 230, 255, 0.20) 0%, rgba(126, 230, 255, 0.08) 34%, rgba(0, 0, 0, 0) 66%);
  filter: blur(10px);
  animation: haloDrift 6s ease-in-out infinite;
}

.avatar-shell {
  position: relative;
  z-index: 2;
  width: min(720px, 100%);
  min-height: 620px;
  border-radius: 36px;
  padding: 18px;
  background:
    linear-gradient(180deg, rgba(12, 24, 48, 0.96), rgba(8, 16, 32, 0.92));
}

.avatar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--accent);
  padding: 4px 8px 16px;
}

.avatar-video {
  position: relative;
  min-height: 560px;
  border-radius: 28px;
  overflow: hidden;
  background:
    radial-gradient(circle at 50% 20%, rgba(126, 230, 255, 0.14), transparent 28%),
    linear-gradient(180deg, rgba(15, 32, 58, 0.96), rgba(7, 16, 30, 0.98));
  border: 1px solid rgba(126, 230, 255, 0.18);
}

.self-avatar-mount,
.rtc-stream-mount {
  position: absolute;
  inset: 0;
}

.self-avatar-mount {
  z-index: 1;
}

.rtc-stream-mount {
  z-index: 2;
  pointer-events: none;
}

.stream-badge {
  position: absolute;
  top: 18px;
  right: 18px;
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: rgba(202, 246, 255, 0.92);
  background: rgba(7, 20, 36, 0.78);
  border: 1px solid rgba(126, 230, 255, 0.24);
  backdrop-filter: blur(10px);
}

.avatar-video video,
.avatar-video canvas {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.avatar-placeholder {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  text-align: center;
  gap: 16px;
  color: var(--muted);
}

.avatar-placeholder-note {
  inset: auto 16px 16px 16px;
  min-height: 128px;
  align-content: end;
  padding: 20px 24px;
  border-radius: 24px;
  background: linear-gradient(180deg, rgba(7, 20, 36, 0), rgba(7, 20, 36, 0.74));
}

.avatar-placeholder-note .avatar-placeholder-face {
  display: none;
}

.avatar-placeholder-face {
  width: 220px;
  height: 320px;
  border-radius: 120px 120px 80px 80px;
  background:
    linear-gradient(180deg, rgba(126, 230, 255, 0.52), rgba(116, 162, 255, 0.12));
  border: 1px solid rgba(126, 230, 255, 0.42);
  box-shadow: 0 0 60px rgba(126, 230, 255, 0.18);
  position: relative;
}

.avatar-placeholder-face::before,
.avatar-placeholder-face::after {
  content: "";
  position: absolute;
  top: 92px;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255,255,255,0.96), rgba(126,230,255,0.3));
}

.avatar-placeholder-face::before {
  left: 52px;
}

.avatar-placeholder-face::after {
  right: 52px;
}

.pulse,
.ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(126, 230, 255, 0.22);
}

.pulse-a {
  width: 740px;
  height: 740px;
  animation: pulseGrow 5.5s ease-out infinite;
}

.pulse-b {
  width: 820px;
  height: 820px;
  animation: pulseGrow 5.5s ease-out 1.8s infinite;
}

.ring-one {
  width: 220px;
  height: 220px;
  right: 4%;
  top: 16%;
}

.ring-two {
  width: 180px;
  height: 180px;
  left: 8%;
  top: 20%;
}

.hud-line,
.hud-grid {
  position: absolute;
}

.hud-line {
  bottom: 12%;
  right: 0;
  width: 88%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(126, 230, 255, 0.6), transparent);
}

.hud-grid {
  left: 0;
  bottom: 10%;
  width: 86%;
  height: 170px;
  background-image:
    linear-gradient(rgba(126, 230, 255, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(126, 230, 255, 0.08) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 1), transparent);
}

.conversation-strip {
  gap: 18px;
}

.subtitle-card,
.response-card {
  flex: 1;
  min-height: 128px;
}

.label {
  display: inline-block;
  margin-bottom: 10px;
  color: var(--accent);
  font-size: 12px;
  letter-spacing: 0.2em;
}

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

button {
  border-radius: 999px;
  padding: 12px 18px;
  color: var(--text);
  font-size: 14px;
  cursor: pointer;
  transition: transform 0.18s ease, border-color 0.18s ease, color 0.18s ease;
}

button:hover {
  transform: translateY(-1px);
  border-color: rgba(126, 230, 255, 0.42);
  color: var(--accent);
}

button:disabled {
  opacity: 0.56;
  cursor: not-allowed;
  transform: none;
}

.footnote {
  text-align: center;
}

@keyframes haloDrift {
  0%, 100% {
    transform: translateY(0) scale(1);
  }
  50% {
    transform: translateY(-12px) scale(1.03);
  }
}

@keyframes pulseGrow {
  0% {
    transform: scale(0.84);
    opacity: 0.58;
  }
  70% {
    transform: scale(1);
    opacity: 0;
  }
  100% {
    opacity: 0;
  }
}

@media (max-width: 1200px) {
  body {
    overflow-y: auto;
  }

  .hero {
    grid-template-columns: 1fr;
  }

  .deco-panel {
    min-height: auto;
  }

  .avatar-stage {
    min-height: 540px;
  }

  .conversation-strip {
    flex-direction: column;
  }
}