/* --- Reset & Base --- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg: #0a0a0f;
  --bg-card: #14141f;
  --bg-hover: #1e1e2e;
  --text: #e8e8f0;
  --text-muted: #8888a0;
  --primary: #6c5ce7;
  --primary-hover: #7c6df7;
  --danger: #e74c3c;
  --danger-hover: #f75c4c;
  --success: #2ecc71;
  --warning: #f39c12;
  --border: #2a2a3a;
  --radius: 12px;
  --radius-sm: 8px;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --safe-left: env(safe-area-inset-left, 0px);
  --safe-right: env(safe-area-inset-right, 0px);
}

html, body {
  height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}

/* --- Landing Page --- */
.landing {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 32px 20px;
  padding-top: calc(32px + var(--safe-top));
  padding-bottom: calc(32px + var(--safe-bottom));
  background: #000;
  color: #fff;
  font-family: 'IBM Plex Mono', monospace;
}

.landing-content {
  width: 100%;
  max-width: 420px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 22px;
}

.logo {
  font-size: 2.15rem;
  font-weight: 400;
  letter-spacing: 0.02em;
  color: #fff;
}

.logo-bold {
  font-weight: 700;
}

.btn-create {
  width: 100%;
  max-width: 340px;
  padding: 16px 20px;
  border-radius: 10px;
  border: 1px solid #3a3a3a;
  background: #111;
  color: #fff;
  font-size: 0.95rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease, transform 0.1s ease;
  min-height: 48px;
}

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

.btn-create:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-create:hover:not(:disabled) {
  border-color: #5a5a5a;
}

.btn-create:focus-visible {
  outline: 2px solid #5a5a5a;
  outline-offset: 2px;
}

.join-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.join-label {
  font-size: 1rem;
  letter-spacing: 0.02em;
}

.code-inputs {
  display: flex;
  gap: 12px;
}

.code-digit {
  width: 64px;
  height: 64px;
  border-radius: 10px;
  border: 1px solid #2a2a2a;
  background: #111;
  color: #fff;
  font-size: 1.5rem;
  text-align: center;
  outline: none;
  caret-color: #fff;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.code-digit:focus {
  border-color: #5a5a5a;
  box-shadow: 0 0 0 1px #5a5a5a;
}

.error-msg {
  margin-top: 10px;
  color: #ff6b6b;
  font-size: 0.85rem;
}

.loading-msg {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 10px;
  color: #bdbdbd;
  font-size: 0.85rem;
}

.landing .spinner {
  width: 16px;
  height: 16px;
  border: 2px solid #2a2a2a;
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.landing-footer {
  margin-top: 28px;
  color: #4e4e4e;
  font-size: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
}

.landing-footer .sep {
  color: #2b2b2b;
}

@media (max-width: 420px) {
  .code-digit {
    width: 54px;
    height: 54px;
    font-size: 1.35rem;
  }

  .btn-create {
    max-width: 300px;
    font-size: 0.9rem;
  }
}

.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* --- Room --- */
.room {
  position: relative;
  width: 100vw;
  height: 100vh;
  height: 100dvh;
  background: var(--bg);
  overflow: hidden;
}

/* --- Video Grid --- */
.video-grid {
  position: absolute;
  inset: 0;
  display: grid;
  gap: 4px;
  padding: 4px;
  background: #000;
}

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

.video-grid.layout-2 {
  grid-template-columns: 1fr;
  grid-template-rows: 1fr;
}

.video-grid.layout-3 {
  grid-template-columns: 1fr;
  grid-template-rows: 1fr 1fr;
}

.video-grid.layout-4 {
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1fr;
}

/* Landscape overrides for 3+ participants */
@media (orientation: landscape) and (min-width: 640px) {
  .video-grid.layout-3 {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr;
  }

  .video-grid.layout-4 {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr 1fr;
  }
}

.video-wrapper {
  position: relative;
  overflow: hidden;
  background: #111;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.video-wrapper video {
  width: 100%;
  height: 100%;
  object-fit: contain; /* Show full frame — no cropping of portrait/landscape */
}

.remote-video {
  transform: scaleX(-1);
}

/* --- PiP (Self View) --- */
.pip {
  position: fixed;
  bottom: calc(100px + var(--safe-bottom));
  right: 12px;
  width: 120px;
  border-radius: var(--radius);
  overflow: hidden;
  border: 2px solid rgba(255, 255, 255, 0.2);
  z-index: 100;
  cursor: grab;
  touch-action: none;
  transition: left 0.3s ease, top 0.3s ease, right 0.3s ease, bottom 0.3s ease;
  background: #111;
}

.pip:active {
  cursor: grabbing;
}

.pip video {
  width: 100%;
  display: block;
  /* No fixed height — video determines aspect ratio naturally */
  /* Mirror is controlled by JS (front camera only) */
}

.relay-badge {
  position: absolute;
  top: 6px;
  left: 6px;
  background: var(--warning);
  color: #000;
  font-size: 0.6rem;
  font-weight: 700;
  padding: 2px 5px;
  border-radius: 4px;
  letter-spacing: 0.5px;
}

/* Larger PiP on bigger screens */
@media (min-width: 640px) {
  .pip {
    width: 180px;
  }
}

/* --- Top Bar --- */
.top-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  padding: calc(12px + var(--safe-top)) 16px 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: linear-gradient(to bottom, rgba(0, 0, 0, 0.7), transparent);
  z-index: 50;
  pointer-events: none;
}

.top-bar > * {
  pointer-events: auto;
}

.room-info {
  display: flex;
  align-items: center;
  gap: 8px;
}

.room-code {
  font-family: 'SF Mono', Monaco, 'Cascadia Code', monospace;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.1);
  padding: 4px 12px;
  border-radius: 6px;
}

.btn-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: rgba(255, 255, 255, 0.1);
  border: none;
  border-radius: 8px;
  color: var(--text);
  cursor: pointer;
  transition: background 0.2s;
}

.btn-icon:hover {
  background: rgba(255, 255, 255, 0.2);
}

.copy-toast {
  font-size: 0.8rem;
  color: var(--success);
  font-weight: 600;
}

.top-bar-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.stats-display {
  font-family: 'SF Mono', Monaco, 'Cascadia Code', monospace;
  font-size: 0.7rem;
  color: var(--text-muted);
  background: rgba(0, 0, 0, 0.5);
  padding: 3px 8px;
  border-radius: 4px;
  white-space: nowrap;
}

.stats-display:empty {
  display: none;
}

.participant-count {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* --- Controls --- */
.controls {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 16px 16px calc(16px + var(--safe-bottom));
  background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
  z-index: 50;
}

.btn-control {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: none;
  background: rgba(255, 255, 255, 0.15);
  color: white;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
  touch-action: manipulation;
}

.btn-control:hover {
  background: rgba(255, 255, 255, 0.25);
}

.btn-control:active {
  transform: scale(0.92);
}

.btn-control.active {
  background: rgba(231, 76, 60, 0.6);
}

.btn-control.active:hover {
  background: rgba(231, 76, 60, 0.75);
}

.btn-leave {
  background: var(--danger);
}

.btn-leave:hover {
  background: var(--danger-hover);
}

/* --- Status Overlay --- */
.status-overlay {
  position: fixed;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: rgba(10, 10, 15, 0.92);
  z-index: 200;
  gap: 16px;
}

.status-overlay[hidden] {
  display: none;
}

.status-overlay .spinner {
  width: 32px;
  height: 32px;
}

.status-overlay p {
  color: var(--text-muted);
  font-size: 1rem;
  text-align: center;
  max-width: 300px;
  line-height: 1.5;
}

.status-overlay.error .spinner {
  display: none;
}

.status-overlay.error p {
  color: var(--danger);
}

/* --- Empty state (waiting for others) --- */
.video-grid.layout-1::after {
  content: 'Waiting for others to join...';
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 1.1rem;
  pointer-events: none;
}

/* --- Accessibility: Focus styles --- */
.btn:focus-visible,
.btn-control:focus-visible,
.btn-icon:focus-visible,
.input:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* --- Animations --- */
.video-wrapper {
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}