:root {
  --bg: #0d1b2e;
  --panel: #13294a;
  --panel-2: #16315a;
  --border: #24436f;
  --text: #e8eefc;
  --muted: #9db4d6;
  --accent: #3778bf;
  --accent-2: #5b9be6;
  --danger: #ff6b6b;
  --ok: #56d364;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", system-ui, Arial, sans-serif;
}

.app {
  max-width: 1280px;
  margin: 0 auto;
  padding: 24px 20px 60px;
}

.app__header { margin-bottom: 20px; }
.app__header h1 {
  margin: 0 0 4px;
  font-size: 26px;
  font-weight: 700;
}
.app__subtitle {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.layout {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 20px;
  align-items: start;
}

/* ---- Controls panel ---- */
.controls {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.field { display: flex; flex-direction: column; gap: 6px; }
.field label { font-size: 13px; color: var(--muted); font-weight: 600; }
.hint { color: var(--muted); font-weight: 400; font-size: 12px; }

textarea, input[type="text"], input[type="number"], select {
  width: 100%;
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 9px 11px;
  font-size: 14px;
  font-family: inherit;
}
textarea { resize: vertical; line-height: 1.35; }
select { cursor: pointer; }
input[type="color"] {
  border: none;
  background: none;
  width: 42px;
  height: 30px;
  padding: 0;
  cursor: pointer;
}

.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }

[hidden] { display: none !important; }

.color-row { display: flex; align-items: center; gap: 10px; }
.swatches { display: flex; gap: 6px; }
.swatch {
  width: 26px;
  height: 26px;
  border-radius: 6px;
  border: 2px solid rgba(255,255,255,0.25);
  cursor: pointer;
  padding: 0;
}
.swatch--white { border-color: #555; }
.swatch:hover { transform: scale(1.06); }

input[type="range"] { width: 100%; accent-color: var(--accent-2); }

.check {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 14px;
  color: var(--text) !important;
  cursor: pointer;
}
.check input { width: 16px; height: 16px; accent-color: var(--accent-2); }

/* Lock the controls while a render is in progress */
.controls--locked .field,
.controls--locked .actions,
.controls--locked .seg,
.controls--locked .check,
.controls--locked .swatch {
  opacity: 0.55;
  pointer-events: none;
}

/* segmented control */
.seg { border: 0; padding: 0; margin: 0; display: flex; gap: 6px; }
.seg__option { flex: 1; }
.seg__option input { position: absolute; opacity: 0; pointer-events: none; }
.seg__option span {
  display: block;
  text-align: center;
  padding: 9px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--muted);
  font-size: 14px;
  cursor: pointer;
  user-select: none;
}
.seg__option input:checked + span {
  background: var(--accent);
  border-color: var(--accent-2);
  color: #fff;
  font-weight: 600;
}

.actions { display: flex; gap: 10px; margin-top: 4px; }
.btn {
  flex: 1;
  border: 1px solid var(--border);
  border-radius: 9px;
  padding: 12px 16px;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  background: var(--panel-2);
  color: var(--text);
}
.btn--primary {
  background: var(--accent);
  border-color: var(--accent-2);
  color: #fff;
}
.btn--primary:hover { background: var(--accent-2); }
.btn:disabled { opacity: 0.55; cursor: not-allowed; }

.status {
  min-height: 18px;
  margin: 2px 0 0;
  font-size: 13px;
  color: var(--muted);
}
.status--error { color: var(--danger); }
.status--ok { color: var(--ok); }

.badge {
  display: inline-block;
  padding: 1px 8px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  border: 1px solid var(--border);
  color: var(--muted);
}
.badge--ok { color: var(--ok); border-color: var(--ok); }
.badge--bad { color: var(--danger); border-color: var(--danger); }
.badge--checking { color: var(--muted); }

/* ---- Preview ---- */
.preview {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
}
.preview__frame {
  position: relative;
  width: 100%;
  min-height: 360px;
  display: flex;
  justify-content: center;
  align-items: center;
  background:
    repeating-conic-gradient(#0000 0 25%, rgba(255,255,255,0.04) 0 50%) 0 0/24px 24px;
  border-radius: 10px;
  padding: 14px;
  border: 1px solid var(--border);
}
#canvas,
#previewVideo,
#previewImg {
  width: 640px;
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: 4px;
  box-shadow: 0 10px 40px rgba(0,0,0,0.5);
}
.preview__progress {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  text-align: center;
  padding: 20px;
  background: rgba(10, 22, 40, 0.72);
  backdrop-filter: blur(2px);
  border-radius: 10px;
}
.preview__progress-value {
  font-size: 46px;
  font-weight: 700;
  color: var(--accent-2);
  font-variant-numeric: tabular-nums;
}
.preview__progress-bar {
  width: min(70%, 320px);
  height: 8px;
  border-radius: 4px;
  background: var(--panel-2);
  overflow: hidden;
}
.preview__progress-fill {
  height: 100%;
  width: 0%;
  background: var(--accent);
  border-radius: 4px;
}

.preview__meta {
  margin-top: 10px;
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font-size: 13px;
}

/* ---- About / license / privacy ---- */
.about {
  margin-top: 20px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px 20px;
}
.about h2 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
}
.about h2:not(:first-child) { margin-top: 18px; }
.about p {
  margin: 0 0 6px;
  font-size: 14px;
  line-height: 1.55;
  color: var(--text);
}
.about p b { color: var(--text); }
.about a { color: var(--accent-2); text-decoration: none; }
.about a:hover { text-decoration: underline; }
.about details {
  margin-top: 18px;
  border-top: 1px solid var(--border);
  padding-top: 12px;
}
.about details > summary {
  cursor: pointer;
  list-style: none;
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .04em;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 6px;
}
.about details > summary::-webkit-details-marker { display: none; }
.about details > summary::before { content: "\25B8"; transition: transform .15s; }
.about details[open] > summary::before { transform: rotate(90deg); }
.about__body { margin-top: 10px; }
.about__body ul { margin: 8px 0; padding-left: 20px; }
.about__body li { font-size: 14px; line-height: 1.55; margin: 4px 0; color: var(--text); }

@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
}