:root {
  color-scheme: dark;
  --bg: #101418;
  --panel: #181f26;
  --panel-soft: #202a32;
  --text: #eef4f8;
  --muted: #9fb0ba;
  --accent: #2aa889;
  --accent-strong: #35caa5;
  --danger: #d85b5b;
  --border: #34424b;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(circle at 20% 0%, #19382f 0, transparent 34rem), var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button,
input {
  font: inherit;
}

.shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1rem;
}

.join-panel,
.room-panel {
  width: min(100%, 68rem);
  background: color-mix(in srgb, var(--panel) 94%, transparent);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 1rem 3rem rgb(0 0 0 / 0.28);
}

.join-panel {
  max-width: 26rem;
  display: grid;
  gap: 1rem;
  padding: 1.25rem;
}

.room-panel {
  min-height: min(42rem, calc(100vh - 2rem));
  display: grid;
  grid-template-rows: auto 1fr auto;
}

.room-header,
.controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 1rem;
  border-color: var(--border);
}

.room-header {
  border-bottom: 1px solid var(--border);
}

.controls {
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
}

.eyebrow {
  margin: 0 0 0.2rem;
  color: var(--accent-strong);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(1.45rem, 2.4vw, 2.1rem);
  line-height: 1.05;
  letter-spacing: 0;
}

label {
  display: grid;
  gap: 0.35rem;
  color: var(--muted);
  font-size: 0.92rem;
}

input {
  width: 100%;
  min-height: 2.7rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--panel-soft);
  color: var(--text);
  padding: 0.65rem 0.75rem;
}

button {
  min-height: 2.75rem;
  border: 1px solid color-mix(in srgb, var(--accent) 74%, white);
  border-radius: 6px;
  background: var(--accent);
  color: #071411;
  padding: 0.65rem 0.9rem;
  font-weight: 750;
  cursor: pointer;
}

button[aria-pressed="true"] {
  background: var(--panel-soft);
  color: var(--text);
  border-color: var(--border);
}

button.danger {
  background: transparent;
  border-color: var(--danger);
  color: #ffb7b7;
}

.error {
  min-height: 1.2rem;
  margin: 0;
  color: #ffb7b7;
}

.status {
  color: var(--muted);
  font-size: 0.92rem;
  white-space: nowrap;
}

.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(15rem, 100%), 1fr));
  align-content: start;
  gap: 0.75rem;
  padding: 0.75rem;
  overflow: auto;
}

.tile {
  min-height: 10rem;
  aspect-ratio: 16 / 10;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #0b0f13;
  position: relative;
  overflow: hidden;
  display: grid;
  place-items: center;
}

.tile video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.avatar {
  width: 4.5rem;
  height: 4.5rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--panel-soft);
  border: 1px solid var(--border);
  font-size: 1.8rem;
  font-weight: 800;
}

.nameplate {
  position: absolute;
  left: 0.6rem;
  right: 0.6rem;
  bottom: 0.55rem;
  display: flex;
  justify-content: space-between;
  gap: 0.5rem;
  color: var(--text);
  text-shadow: 0 1px 3px #000;
  font-size: 0.9rem;
}

@media (max-width: 540px) {
  .room-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .controls button {
    flex: 1 1 calc(50% - 0.75rem);
  }
}