:root {
  --bg: #0b0c0e;
  --surface: #121417;
  --card: #161a1d;
  --text: #e6e8ea;
  --text-secondary: #a2a8ad;
  --muted: #7b8288;
  --teal: #00d1b8;
  --border: #22262b;
  --ring: rgba(0, 209, 184, 0.35);
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: radial-gradient(1200px 800px at 10% -20%, #0e1013 0%, var(--bg) 60%);
  color: var(--text);
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.app {
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr auto;
}

.app__header, .app__footer {
  padding: 20px 24px;
}

.branding {
  display: flex;
  align-items: center;
  gap: 12px;
}
.logo {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  background: linear-gradient(180deg, #0e1417 0%, #0a0c0e 100%);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: 0 6px 18px rgba(0,0,0,0.35), inset 0 0 0 1px rgba(255,255,255,0.02);
}
.title {
  margin: 0;
  font-size: 20px;
  font-weight: 700;
}
.subtitle {
  margin: 2px 0 0;
  color: var(--text-secondary);
  font-size: 14px;
}

.app__main {
  display: grid;
  place-items: center;
  padding: 24px;
}

.card {
  width: 100%;
  max-width: 860px;
  background: linear-gradient(180deg, #121417 0%, #101215 100%);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px;
  box-shadow: 0 10px 40px rgba(0,0,0,0.45), inset 0 1px 0 rgba(255,255,255,0.04);
}

.upload {
  display: grid;
  place-items: center;
  gap: 10px;
  border: 1px dashed var(--border);
  border-radius: 12px;
  padding: 28px;
  background: rgba(255,255,255,0.02);
  transition: border-color 200ms ease, background 200ms ease, box-shadow 200ms ease;
  cursor: pointer;
}
.upload input[type="file"] {
  display: none;
}
.upload__hint { color: var(--text-secondary); font-size: 14px; margin: 0; }
.kbd {
  color: var(--text);
  padding: 2px 8px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: #0f1114;
}
.upload--dragging {
  border-color: var(--teal);
  background: rgba(0, 209, 184, 0.06);
  box-shadow: 0 0 0 4px var(--ring);
}

.controls {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
.control { display: grid; gap: 6px; }
.label { color: var(--text-secondary); font-size: 13px; }
.input {
  width: 100%;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #0f1114;
  color: var(--text);
  outline: none;
  transition: box-shadow 180ms ease, border-color 180ms ease;
}
.input:focus {
  border-color: var(--teal);
  box-shadow: 0 0 0 4px var(--ring);
}

.preview { margin-top: 16px; }
.preview__video {
  width: 100%;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: #0a0c0e;
}

.actions {
  margin-top: 16px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.btn {
  appearance: none;
  border: 1px solid var(--border);
  background: #0f1114;
  color: var(--text);
  padding: 10px 14px;
  border-radius: 12px;
  cursor: pointer;
  font-weight: 600;
  transition: transform 120ms ease, background 200ms ease, box-shadow 200ms ease, border-color 200ms ease;
}
.btn:hover { transform: translateY(-1px); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn:focus { outline: none; box-shadow: 0 0 0 4px var(--ring); border-color: var(--teal); }
.btn--primary {
  background: linear-gradient(180deg, rgba(0,209,184,0.15) 0%, rgba(0,209,184,0.08) 100%);
  border-color: rgba(0,209,184,0.4);
  color: var(--text);
}

.frames {
  margin-top: 16px;
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 8px;
}
.frame-thumb {
  width: 100%;
  height: auto;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #0f1114;
  cursor: pointer;
  transition: transform 120ms ease, box-shadow 200ms ease;
}
.frame-thumb:hover { transform: translateY(-2px); box-shadow: 0 10px 24px rgba(0,0,0,0.35); }

.status { margin-top: 10px; color: var(--muted); font-size: 14px; }

.output { margin-top: 16px; display: grid; place-items: center; gap: 12px; }
.output__image { border-radius: 12px; border: 1px solid var(--border); max-width: 100%; height: auto; }

.app__footer { color: var(--muted); text-align: center; }
.teal { color: var(--teal); }

.is-hidden { display: none !important; }

@media (max-width: 900px) {
  .controls { grid-template-columns: 1fr; }
  .frames { grid-template-columns: repeat(4, 1fr); }
}

@media (max-width: 520px) {
  .frames { grid-template-columns: repeat(3, 1fr); }
}