:root {
  --bg: #0b1020;
  --panel: rgba(255, 255, 255, 0.08);
  --card-border: rgba(255, 255, 255, 0.12);
  --text: #edf2ff;
  --muted: #aab6d3;
  --accent: #7c9cff;
  --accent-2: #82e9de;
  --shadow: 0 18px 60px rgba(0, 0, 0, 0.28);
}

body.light {
  --bg: #eef3ff;
  --panel: rgba(255, 255, 255, 0.82);
  --card-border: rgba(17, 24, 39, 0.08);
  --text: #0f172a;
  --muted: #475569;
  --accent: #3459eb;
  --accent-2: #0ea5a4;
  --shadow: 0 18px 50px rgba(34, 56, 98, 0.12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, system-ui, sans-serif;
  background:
    radial-gradient(circle at top right, rgba(124, 156, 255, 0.22), transparent 30%),
    radial-gradient(circle at top left, rgba(130, 233, 222, 0.14), transparent 25%),
    var(--bg);
  color: var(--text);
  min-height: 100vh;
}

img { max-width: 100%; display: block; }
button, select, input { font: inherit; }
.container { width: min(1180px, calc(100% - 2rem)); margin: 0 auto; }
.page-shell { padding: 24px 0 40px; }
.site-header {
  display: flex;
  justify-content: space-between;
  align-items: start;
  gap: 24px;
  padding: 28px 0 20px;
}
.site-header h1 { font-size: clamp(2rem, 4vw, 4rem); line-height: 1.02; margin: 14px 0; max-width: 10ch; }
.lede { max-width: 60ch; color: var(--muted); font-size: 1.05rem; }
.brand-row { display: flex; align-items: center; gap: 12px; }
.logo { width: 38px; height: 38px; }
.eyebrow { text-transform: uppercase; letter-spacing: 0.12em; font-size: 0.78rem; font-weight: 700; color: var(--accent-2); }
.header-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.primary-btn, .secondary-btn {
  border: none; border-radius: 16px; padding: 0.9rem 1.15rem; cursor: pointer; text-decoration: none;
  transition: transform .2s ease, opacity .2s ease, background .2s ease; box-shadow: var(--shadow);
}
.primary-btn:hover, .secondary-btn:hover { transform: translateY(-1px); }
.primary-btn { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: white; font-weight: 700; }
.secondary-btn { background: var(--panel); color: var(--text); border: 1px solid var(--card-border); }
.glass { background: var(--panel); border: 1px solid var(--card-border); box-shadow: var(--shadow); backdrop-filter: blur(16px); }
.card-grid { display: grid; grid-template-columns: 1.4fr 0.9fr; gap: 18px; margin: 22px auto 28px; }
.hero-card, .feature-stack, .panel { border-radius: 28px; padding: 24px; }
.feature-stack { display: grid; gap: 14px; }
.mini-card { border-radius: 20px; padding: 18px; font-weight: 600; }
.stat-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.stat-grid div { padding: 18px; border-radius: 20px; background: rgba(255,255,255,0.06); }
.stat-grid strong { display: block; font-size: 1.3rem; margin-bottom: 6px; }
.stat-grid span, .panel-header p, .hint { color: var(--muted); }
.workspace { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 18px; align-items: start; }
.panel-header h2 { margin: 0 0 6px; }
.drop-zone {
  margin-top: 18px; border: 2px dashed rgba(124, 156, 255, 0.55); border-radius: 24px; padding: 34px 18px;
  text-align: center; cursor: pointer; transition: background .2s ease, border-color .2s ease, transform .2s ease;
}
.drop-zone:hover, .drop-zone:focus, .drop-zone.dragover { background: rgba(124, 156, 255, 0.12); transform: translateY(-1px); outline: none; }
.upload-icon { font-size: 2.25rem; margin-bottom: 10px; }
.toolbar, .advanced-grid, .cta-row, .download-row, .info-grid { display: grid; gap: 12px; }
.toolbar { grid-template-columns: repeat(4, minmax(0, 1fr)); margin: 18px 0; }
.toolbar label, .advanced-grid label { display: grid; gap: 8px; font-weight: 600; }
select {
  width: 100%; border-radius: 14px; padding: 12px 14px; background: rgba(255,255,255,0.08); color: var(--text);
  border: 1px solid var(--card-border);
}
.advanced-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); margin-bottom: 18px; }
.advanced-grid label {
  background: rgba(255,255,255,0.05); border: 1px solid var(--card-border); border-radius: 16px; padding: 12px 14px;
  grid-template-columns: auto 1fr; align-items: center;
}
.cta-row, .download-row { grid-template-columns: auto auto 1fr; align-items: center; }
.queue { display: grid; gap: 10px; margin-top: 20px; }
.queue-item {
  display: grid; grid-template-columns: 72px 1fr auto; gap: 14px; align-items: center; padding: 10px;
  border: 1px solid var(--card-border); border-radius: 18px; background: rgba(255,255,255,0.04);
}
.queue-item img { width: 72px; height: 72px; object-fit: cover; border-radius: 14px; }
.queue-meta small { display: block; color: var(--muted); margin-top: 4px; }
.queue-tag { padding: 6px 10px; border-radius: 999px; background: rgba(130, 233, 222, 0.16); color: var(--accent-2); font-size: 0.82rem; font-weight: 700; }
.progress-wrap { margin-top: 18px; }
.progress-meta { display: flex; justify-content: space-between; gap: 12px; margin-bottom: 8px; }
.progress-bar { height: 12px; border-radius: 999px; background: rgba(255,255,255,0.08); overflow: hidden; }
.progress-bar span { display: block; height: 100%; width: 0%; background: linear-gradient(90deg, var(--accent), var(--accent-2)); transition: width .2s ease; }
.hidden { display: none !important; }
.preview-panel { position: sticky; top: 20px; }
.comparison {
  position: relative; min-height: 360px; margin: 18px 0; border-radius: 26px; overflow: hidden;
  background: rgba(255,255,255,0.04); border: 1px solid var(--card-border);
}
.comparison.empty-state img, .comparison.empty-state .after-layer, .comparison.empty-state #compareSlider { display: none; }
.empty-message { display: grid; place-items: center; text-align: center; height: 360px; padding: 20px; color: var(--muted); }
.comparison > img, .after-layer img { width: 100%; height: 100%; object-fit: contain; background: #0000000d; }
.comparison > img { position: absolute; inset: 0; }
.after-layer { position: absolute; inset: 0; width: 50%; overflow: hidden; border-right: 2px solid white; }
#compareSlider {
  position: absolute; inset-inline: 20px; bottom: 18px; width: calc(100% - 40px);
}
.info-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); margin-top: 18px; }
.info-grid article { padding: 16px; border-radius: 20px; border: 1px solid var(--card-border); background: rgba(255,255,255,0.04); }
.info-grid h3 { margin-top: 0; }

@media (max-width: 980px) {
  .site-header, .workspace, .card-grid { grid-template-columns: 1fr; display: grid; }
  .preview-panel { position: static; }
  .toolbar { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 720px) {
  .toolbar, .advanced-grid, .info-grid, .cta-row, .download-row { grid-template-columns: 1fr; }
  .site-header { padding-top: 10px; }
  .hero-card, .feature-stack, .panel { padding: 18px; }
  .queue-item { grid-template-columns: 58px 1fr; }
  .queue-tag { justify-self: start; }
}