:root {
  --bg: #121212;
  --panel: #1a1a1a;
  --panel-raised: #1f1f1f;
  --border: #303030;
  --text: #f2f0ec;
  --muted: #93908a;
  --green: #34d399;
  --red: #f87171;
  --accent: #ff5c35;
  --accent-ink: #2a0e03;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --font-display: "Fraunces", Georgia, "Times New Roman", serif;
  --font-body: "Manrope", -apple-system, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
}

h1, h2, h3, .font-display { font-family: var(--font-display); font-weight: 600; letter-spacing: -0.01em; }

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  row-gap: 10px;
  padding: 16px 32px;
  background: rgba(18,18,18,0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.topbar-brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.topbar-brand .logo-mark { display: none; }
.topbar h1 {
  margin: 0;
  font-size: 19px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.01em;
}
.topbar h1 .brand-dot { color: var(--accent); }
.subtitle { margin: 0; width: 100%; color: var(--muted); font-size: 12.5px; font-family: var(--font-body); }

main { padding: 28px 32px 48px; }

.dropzone {
  border: 2px dashed var(--border);
  border-radius: 12px;
  padding: 64px 24px;
  text-align: center;
  cursor: pointer;
  transition: border-color .15s, background .15s;
  max-width: 720px;
  margin: 40px auto;
}
.dropzone:hover, .dropzone.dragover {
  border-color: var(--accent);
  background: rgba(255,92,53,0.06);
}
.dropzone-icon { font-size: 32px; color: var(--accent); margin-bottom: 8px; }
.hint { color: var(--muted); font-size: 13px; }

.first-time-help {
  max-width: 720px;
  margin: -12px auto 40px;
  padding: 18px 22px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}
.first-time-help-title { margin: 0 0 14px; font-size: 13px; color: var(--muted); font-weight: 600; }
.first-time-steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.first-time-step { display: flex; gap: 10px; align-items: flex-start; }
.first-time-step .step-num {
  font-family: var(--font-display);
  color: var(--accent);
  font-size: 20px;
  line-height: 1;
  flex-shrink: 0;
}
.first-time-step strong { display: block; font-size: 13px; margin-bottom: 3px; }
.first-time-step small { display: block; color: var(--muted); font-size: 12px; line-height: 1.4; }
@media (max-width: 720px) {
  .first-time-steps { grid-template-columns: 1fr; }
  .first-time-help { margin: -8px 4px 28px; }
}

.controls-heading { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; }
.controls-heading h2 { margin: 0; }
.btn-help {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: none;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  line-height: 1;
}
.btn-help:hover { color: var(--accent); border-color: var(--accent); }
.help-panel {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  margin: -6px 0 16px;
}
.help-panel p { margin: 0 0 10px; font-size: 12px; line-height: 1.5; color: var(--muted); }
.help-panel p:last-child { margin-bottom: 0; }
.help-panel strong { color: var(--text); }

.hidden { display: none !important; }

.workspace {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 24px;
  align-items: start;
}

.video-col video {
  width: 100%;
  max-height: 460px;
  background: #000;
  border-radius: 10px;
  display: block;
  box-shadow: 0 12px 40px rgba(0,0,0,0.35);
}

.summary-line {
  margin: 14px 0 0;
  font-size: 14px;
  color: var(--text);
}
.summary-line strong { color: var(--green); }

.stats-row {
  display: flex;
  gap: 12px;
  margin-top: 12px;
  flex-wrap: wrap;
}
.stat {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 14px;
  min-width: 90px;
}
.stat-muted { opacity: .55; }
.stat-label { display: block; font-size: 11px; color: var(--muted); text-transform: uppercase; letter-spacing: .03em; }
.stat-value { display: block; font-size: 16px; font-weight: 600; margin-top: 2px; }

.timeline-wrap {
  margin-top: 16px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px;
  box-shadow: 0 8px 30px rgba(0,0,0,0.25);
}
#timeline { width: 100%; display: block; cursor: pointer; }

.timeline-legend {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 8px 6px 2px;
  font-size: 12px;
  color: var(--muted);
}
.legend-item { display: inline-flex; align-items: center; gap: 6px; }
.dot { width: 9px; height: 9px; border-radius: 50%; display: inline-block; }
.dot-green { background: var(--green); }
.dot-red { background: var(--red); }
.legend-hint { margin-left: auto; }

.controls {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 18px;
  position: sticky;
  top: 80px;
  box-shadow: 0 8px 30px rgba(0,0,0,0.25);
}
.controls h2 { margin: 0 0 14px; font-size: 15px; }
.controls h2.section-title { margin-top: 20px; padding-top: 18px; border-top: 1px solid var(--border); }

.presets {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-bottom: 18px;
}
.preset-btn {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 6px;
  color: var(--text);
  cursor: pointer;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.preset-btn strong { font-size: 12.5px; }
.preset-btn small { color: var(--muted); font-size: 10.5px; line-height: 1.25; }
.preset-btn:hover { border-color: var(--accent); }
.preset-btn.active { border-color: var(--accent); background: rgba(255,92,53,0.12); }
.preset-btn.active strong { color: var(--accent); }

.advanced { margin-bottom: 4px; }
.advanced summary {
  cursor: pointer;
  font-size: 13px;
  color: var(--muted);
  padding: 6px 0;
  user-select: none;
}
.advanced summary:hover { color: var(--text); }
.advanced[open] summary { color: var(--text); margin-bottom: 6px; }
.advanced .control:first-of-type { margin-top: 4px; }

.control {
  display: block;
  margin-bottom: 16px;
  font-size: 13px;
}
.control span { display: flex; justify-content: space-between; margin-bottom: 6px; }
.control output { color: var(--accent); font-variant-numeric: tabular-nums; }
.control input[type="range"] { width: 100%; }
.control small { color: var(--muted); display: block; margin-top: 3px; }
.control select {
  width: 100%;
  padding: 6px 8px;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
}

.btn-export, .btn-download, .btn-reset {
  display: block;
  width: 100%;
  padding: 11px;
  border-radius: var(--radius-md);
  border: none;
  font-size: 14px;
  font-weight: 700;
  font-family: var(--font-body);
  cursor: pointer;
  text-align: center;
  text-decoration: none;
  box-sizing: border-box;
  transition: filter .15s, background .15s;
}
.btn-export { background: var(--accent); color: var(--accent-ink); margin-top: 6px; }
.btn-export:hover:not(:disabled) { filter: brightness(1.08); }
.btn-export:disabled { opacity: .5; cursor: not-allowed; }
.btn-download { background: var(--green); color: #06281c; margin-top: 10px; }
.btn-reset { background: transparent; color: var(--muted); border: 1px solid var(--border); margin-top: 20px; }
.btn-reset:hover { color: var(--text); border-color: var(--muted); }

.video-loader {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 20px 0;
}
.video-loader.hidden { display: none; }
.video-loader-bar {
  width: 10px;
  height: 44px;
  border-radius: 5px;
  animation: video-loader-bounce 1s ease-in-out infinite;
}
.video-loader-bar:nth-child(1) { background: var(--green); animation-delay: .1s; }
.video-loader-bar:nth-child(2) { background: var(--red); animation-delay: .2s; }
.video-loader-bar:nth-child(3) { background: var(--green); animation-delay: .1s; }
.upload-progress { width: 100%; max-width: 280px; margin: 4px auto 0; }
.upload-percent { font-size: 12px; color: var(--muted); margin: 6px 0 0; text-align: center; }

@keyframes video-loader-bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-14px); }
}

.legal-main {
  max-width: 720px;
  margin: 40px auto 80px;
  padding: 0 24px;
  line-height: 1.65;
  color: var(--text);
}
.legal-main h1 { font-size: 26px; margin: 0 0 4px; }
.legal-main .legal-updated { color: var(--muted); font-size: 13px; margin: 0 0 32px; }
.legal-main h2 { font-size: 17px; margin: 32px 0 10px; }
.legal-main p, .legal-main li { font-size: 14px; color: var(--text); }
.legal-main ul { padding-left: 20px; margin: 8px 0; }
.legal-main li { margin: 4px 0; }
.legal-main a { color: var(--accent); }
.legal-main strong { color: var(--text); }

.site-footer {
  border-top: 1px solid var(--border);
  padding: 20px 24px;
  text-align: center;
  font-size: 12.5px;
  color: var(--muted);
}
.site-footer a { color: var(--muted); text-decoration: underline; }
.site-footer a:hover { color: var(--text); }
.site-footer .footer-sep { margin: 0 8px; }

.export-progress { margin-top: 14px; }
.progress-bar {
  height: 8px;
  background: var(--bg);
  border-radius: 4px;
  overflow: hidden;
  border: 1px solid var(--border);
}
.progress-fill {
  height: 100%;
  width: 0%;
  background: var(--accent);
  transition: width .2s;
}
#exportStatus { font-size: 12px; color: var(--muted); margin: 6px 0 0; }

@media (max-width: 860px) {
  .workspace { grid-template-columns: 1fr; }
  .controls { position: static; }
}
@media (max-width: 640px) {
  main { padding: 20px 16px 40px; }
  .dropzone { padding: 44px 16px; margin: 24px auto; }
  .presets { grid-template-columns: repeat(3, 1fr); gap: 6px; }
  .preset-btn { padding: 8px 4px; }
  .preset-btn small { display: none; }
  .stats-row { gap: 8px; }
  .stat { padding: 7px 10px; min-width: 76px; }
}