:root {
  color-scheme: light;
  --bg: #f5f7fb;
  --panel: #ffffff;
  --text: #17202a;
  --muted: #607086;
  --line: #dde4ee;
  --accent: #1f6feb;
  --accent-strong: #1558b8;
  --danger: #b42318;
  --shadow: 0 10px 30px rgba(23, 32, 42, 0.08);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.45;
}

a { color: var(--accent); }

.site-header {
  padding: 2.2rem clamp(1rem, 4vw, 3rem) 1.2rem;
}

.site-header.compact { padding-bottom: 0.6rem; }

.site-header h1 {
  margin: 0.2rem 0 0.35rem;
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  letter-spacing: -0.02em;
}

.subtitle {
  margin: 0;
  color: var(--muted);
  max-width: 70ch;
}

.back-link {
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
}

.gallery-wrap,
.detail-wrap {
  padding: 1rem clamp(1rem, 4vw, 3rem) 2rem;
  max-width: 1400px;
  margin: 0 auto;
}

.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
}

.card {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  padding: 1.1rem;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: var(--shadow);
  text-decoration: none;
  color: inherit;
  transition: transform 120ms ease, border-color 120ms ease;
}

.card:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
}

.card h2 {
  margin: 0;
  font-size: 1.08rem;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.card-meta {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-top: auto;
  padding-top: 0.4rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.14rem 0.5rem;
  border-radius: 999px;
  background: #eaf1ff;
  color: var(--accent-strong);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.badge.cached { background: #e7f8ee; color: #157347; }

.detail-wrap {
  display: grid;
  gap: 1rem;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: var(--shadow);
  padding: 1rem 1.1rem;
}

.panel-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.8rem;
}

.panel-heading h2 {
  margin: 0;
  font-size: 1.05rem;
}

.params-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
  gap: 0.75rem;
}

.param {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.param label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--muted);
}

.param input {
  width: 100%;
  padding: 0.45rem 0.55rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfe;
  color: var(--text);
  font: inherit;
}

.param input:focus {
  outline: 2px solid color-mix(in srgb, var(--accent) 35%, transparent);
  border-color: var(--accent);
}

.param .hint {
  font-size: 0.72rem;
  color: var(--muted);
}

.actions {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  margin-top: 0.9rem;
  flex-wrap: wrap;
}

button,
select {
  font: inherit;
}

button {
  padding: 0.5rem 0.9rem;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: #fff;
  color: var(--text);
  cursor: pointer;
}

button:hover:not(:disabled) { border-color: var(--accent); }

button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
  font-weight: 650;
}

button.primary:hover:not(:disabled) { background: var(--accent-strong); }

button:disabled { opacity: 0.55; cursor: not-allowed; }

.status {
  color: var(--muted);
  font-size: 0.88rem;
}

.status.error { color: var(--danger); }

.player-controls {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  flex-wrap: wrap;
  margin-bottom: 0.7rem;
}

.slider { flex: 1 1 280px; accent-color: var(--accent); }

.speed-label {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--muted);
  font-size: 0.85rem;
}

.frame-label {
  font-variant-numeric: tabular-nums;
  color: var(--muted);
  font-size: 0.88rem;
}

.plot { width: 100%; height: min(62vh, 620px); }
.plot.small { height: 280px; }

.spectrum-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 0.8rem;
}

.overlay-note {
  margin-top: 0.4rem;
  color: var(--muted);
  font-size: 0.8rem;
}

.hidden { display: none !important; }

.muted { color: var(--muted); font-size: 0.85rem; }

.site-footer {
  padding: 0 1.25rem 1.5rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.8rem;
}

@media (max-width: 640px) {
  .site-header { padding-top: 1.2rem; }
  .plot { height: 52vh; }
}