:root {
  color-scheme: dark;
  --bg: #07111f;
  --bg-accent: #0d1728;
  --panel: rgba(10, 20, 37, 0.86);
  --panel-border: rgba(154, 179, 214, 0.14);
  --text: #ebf3ff;
  --muted: #94a8c7;
  --primary: #63a4ff;
  --primary-strong: #3f87f5;
  --danger: #ff6b7d;
  --success: #51d6a3;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
  --radius: 22px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top, rgba(70, 118, 255, 0.2), transparent 32%),
    linear-gradient(180deg, #08111e 0%, #050a12 100%);
  color: var(--text);
}

body {
  padding: 24px;
}

button,
input {
  font: inherit;
}

button {
  border: 0;
  border-radius: 14px;
  padding: 0.95rem 1.1rem;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-strong) 100%);
  color: #041224;
  font-weight: 700;
  cursor: pointer;
  transition: transform 140ms ease, opacity 140ms ease, background 140ms ease;
}

button:hover:not(:disabled) {
  transform: translateY(-1px);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

button.secondary {
  background: rgba(99, 164, 255, 0.12);
  color: var(--text);
}

button.danger {
  background: rgba(255, 107, 125, 0.16);
  color: #ffd8de;
}

input {
  width: 100%;
  border: 1px solid rgba(154, 179, 214, 0.18);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  padding: 0.95rem 1rem;
  outline: none;
}

input:focus {
  border-color: rgba(99, 164, 255, 0.55);
  box-shadow: 0 0 0 4px rgba(99, 164, 255, 0.12);
}

.app-shell {
  max-width: 1200px;
  margin: 0 auto;
}

.topbar {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 24px;
}

.topbar h1 {
  margin: 0.2rem 0 0;
  font-size: clamp(2rem, 4vw, 3.25rem);
  line-height: 1;
}

.eyebrow {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  font-size: 0.75rem;
}

.status-pill {
  padding: 0.8rem 1rem;
  border: 1px solid var(--panel-border);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.05);
  color: var(--muted);
  white-space: nowrap;
}

.grid {
  display: grid;
  grid-template-columns: 350px 1fr 360px;
  gap: 20px;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.stack,
.chat-panel,
.videos-panel {
  padding: 20px;
}

.panel-header h2,
.video-meta h2 {
  margin: 0 0 0.3rem;
}

.panel-header p,
.video-meta span,
.status-list p,
.label,
#remoteState,
#localTracksState {
  margin: 0;
  color: var(--muted);
}

.peer-id-row {
  display: flex;
  gap: 10px;
  align-items: center;
  padding: 14px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.035);
}

.peer-id-row code {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--success);
  font-size: 0.95rem;
}

.field {
  display: grid;
  gap: 8px;
  margin-top: 18px;
}

.field span,
.label {
  font-size: 0.88rem;
  font-weight: 600;
}

.actions {
  display: flex;
  gap: 10px;
  margin-top: 18px;
}

.actions > * {
  flex: 1;
}

.status-list {
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

.status-list div {
  padding: 14px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.035);
}

.video-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.video-card {
  overflow: hidden;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid rgba(154, 179, 214, 0.1);
}

.video-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 14px 14px 0;
}

video {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  display: block;
  background:
    linear-gradient(135deg, rgba(99, 164, 255, 0.08), rgba(81, 214, 163, 0.08)),
    #02060d;
  margin-top: 14px;
}

.controls {
  margin-top: 16px;
}

.chat-panel {
  display: flex;
  flex-direction: column;
  min-height: 620px;
}

.chat-messages {
  flex: 1;
  margin-top: 16px;
  padding: 12px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.035);
  overflow: auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.chat-message {
  max-width: 84%;
  padding: 12px 14px;
  border-radius: 16px;
  line-height: 1.4;
}

.chat-message.self {
  align-self: flex-end;
  background: rgba(99, 164, 255, 0.18);
}

.chat-message.remote {
  align-self: flex-start;
  background: rgba(255, 255, 255, 0.07);
}

.chat-message.system {
  align-self: center;
  background: rgba(81, 214, 163, 0.12);
  color: #c9f7e4;
  font-size: 0.92rem;
}

.chat-form {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  margin-top: 14px;
}

@media (max-width: 1100px) {
  .grid {
    grid-template-columns: 1fr;
  }

  .chat-panel {
    min-height: 420px;
  }
}

@media (max-width: 720px) {
  body {
    padding: 14px;
  }

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

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

  .peer-id-row,
  .actions,
  .chat-form {
    grid-template-columns: 1fr;
    display: grid;
  }

  .video-meta {
    flex-direction: column;
    align-items: flex-start;
  }
}