:root {
  --bg: #111111;
  --panel: #181818;
  --panel-2: #202020;
  --text: rgba(255,255,255,0.92);
  --muted: rgba(255,255,255,0.56);
  --line: rgba(255,255,255,0.08);
  --accent: #ffffff;
  --danger: #ff4b4b;
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --safe-top: env(safe-area-inset-top, 0px);
}

* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  height: 100%;
}
body {
  min-height: 100dvh;
}
button, input, select, textarea { font: inherit; }
button { -webkit-tap-highlight-color: transparent; }

.app-shell {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: calc(10px + var(--safe-top)) 10px calc(12px + var(--safe-bottom));
}

.topbar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}
.title-wrap h1 {
  margin: 0;
  font-size: 18px;
  letter-spacing: 0.08em;
  font-weight: 600;
}
.title-wrap p {
  margin: 4px 0 0;
  font-size: 12px;
  color: var(--muted);
}
.status {
  flex-shrink: 0;
  padding: 7px 10px;
  border-radius: 999px;
  background: var(--panel);
  border: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
}

.viewer-wrap {
  flex: 1;
  min-height: 0;
  display: flex;
}
.viewer {
  position: relative;
  width: 100%;
  border-radius: 26px;
  overflow: hidden;
  background: #000;
  border: 1px solid var(--line);
  box-shadow: 0 0 0 1px rgba(255,255,255,0.03) inset;
  aspect-ratio: 1 / 1;
  max-height: min(62vh, 62vw);
  margin: 0 auto;
}
.video-layer {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  background: #000;
}
.hidden { display: none !important; }
.overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at center, rgba(0,0,0,0.24), rgba(0,0,0,0.5));
}
.hero-btn, .btn, .chip {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255,255,255,0.06);
  color: var(--text);
}
.hero-btn {
  min-width: 128px;
  padding: 14px 18px;
  font-size: 16px;
  background: rgba(255,255,255,0.12);
}
.recording-badge {
  position: absolute;
  top: 10px;
  left: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 11px;
  border-radius: 999px;
  background: rgba(0,0,0,0.64);
  backdrop-filter: blur(8px);
  font-size: 13px;
}
.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--danger);
  box-shadow: 0 0 0 0 rgba(255,75,75,0.6);
  animation: pulse 1.2s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(255,75,75,0.6); }
  70% { box-shadow: 0 0 0 10px rgba(255,75,75,0); }
  100% { box-shadow: 0 0 0 0 rgba(255,75,75,0); }
}

.controls {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.camera-actions .btn {
  min-height: 40px;
}
.camera-actions .btn.active-cam {
  background: rgba(255,255,255,0.16);
  color: var(--text);
}
.row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.btn {
  flex: 1 1 0;
  min-height: 44px;
  padding: 10px 14px;
  background: var(--panel);
}
.btn.primary {
  background: rgba(255,255,255,0.16);
}
.btn:disabled {
  opacity: 0.42;
}
.filters {
  display: grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
}
.chip {
  min-height: 42px;
  padding: 9px 8px;
  background: var(--panel);
  color: var(--muted);
}
.chip.active {
  background: rgba(255,255,255,0.16);
  color: var(--text);
}
.hidden-canvas {
  position: absolute;
  width: 0;
  height: 0;
  pointer-events: none;
  opacity: 0;
}

/* filters */
.viewer.original .video-layer { filter: none; }
.viewer.bw .video-layer { filter: grayscale(1) contrast(1.02); }
.viewer.soft .video-layer { filter: saturate(0.85) brightness(1.04) blur(0.35px); }
.viewer.contrast .video-layer { filter: contrast(1.28) saturate(1.04); }
.viewer.warm .video-layer { filter: sepia(0.24) saturate(1.14) hue-rotate(-10deg) brightness(1.03); }
.viewer.cool .video-layer { filter: saturate(0.92) hue-rotate(14deg) contrast(1.03) brightness(1.02); }

@media (min-width: 700px) {
  .app-shell {
    max-width: 720px;
    margin: 0 auto;
    padding-left: 18px;
    padding-right: 18px;
  }
  .viewer {
    max-height: min(64vh, 620px);
  }
  .filters {
    grid-template-columns: repeat(6, minmax(0,1fr));
  }
}