:root {
  color-scheme: light;
  --bg: #fff4db;
  --panel: rgba(255, 255, 255, 0.78);
  --ink: #1d1d1d;
  --accent: #ff5a36;
  --accent-2: #149f9a;
  --shadow: rgba(39, 29, 14, 0.18);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Trebuchet MS", "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top, rgba(255, 129, 84, 0.3), transparent 34%),
    radial-gradient(circle at bottom left, rgba(20, 159, 154, 0.25), transparent 28%),
    linear-gradient(135deg, #ffe8b8, var(--bg));
}

.app-shell {
  display: grid;
  grid-template-columns: minmax(320px, 1.7fr) minmax(260px, 0.9fr);
  gap: 24px;
  max-width: 1280px;
  margin: 0 auto;
  padding: 24px;
  min-height: 100vh;
  align-items: center;
}

.stage,
.panel {
  border-radius: 28px;
  overflow: hidden;
  box-shadow: 0 24px 60px var(--shadow);
}

.stage {
  position: relative;
  aspect-ratio: 16 / 9;
  background: #181818;
}

.input-video,
.output-canvas,
.loading {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.input-video {
  opacity: 0;
  pointer-events: none;
}

.output-canvas {
  display: block;
}

.loading {
  display: grid;
  place-items: center;
  background: rgba(24, 24, 24, 0.54);
  color: white;
  font-size: 1.15rem;
  letter-spacing: 0.02em;
}

.loading.hidden {
  display: none;
}

.panel {
  padding: 24px 22px;
  background: var(--panel);
  backdrop-filter: blur(10px);
}

.panel h1 {
  margin-top: 0;
  margin-bottom: 10px;
  font-size: clamp(2rem, 3vw, 3rem);
  line-height: 0.95;
}

.panel p,
.panel li {
  font-size: 1rem;
  line-height: 1.45;
}

.panel ul {
  padding-left: 1.1rem;
}

.status {
  margin-top: 18px;
  padding: 12px 14px;
  border-radius: 16px;
  background: rgba(20, 159, 154, 0.12);
  border: 1px solid rgba(20, 159, 154, 0.24);
  font-weight: 600;
}

@media (max-width: 920px) {
  .app-shell {
    grid-template-columns: 1fr;
    padding: 14px;
  }

  .stage {
    order: 1;
  }

  .panel {
    order: 2;
  }
}