:root {
  --bg: #0b1118;
  --bg-2: #0d141d;
  --panel: rgba(16, 26, 36, 0.72);
  --panel-strong: #162232;
  --text: #e8f0f7;
  --muted: #a6b6c5;
  --border: rgba(255,255,255,0.08);
  --accent: #2fd0b5;
  --accent-strong: #22b59c;
  --accent-soft: rgba(47, 208, 181, 0.16);
  --warn: #f2c15b;
  --shadow: 0 16px 40px rgba(5, 10, 18, 0.55), 0 2px 6px rgba(5, 10, 18, 0.35);
  --font-display: "Space Grotesk", "IBM Plex Sans", sans-serif;
  --font-body: "IBM Plex Sans", "Space Grotesk", sans-serif;
  --font-mono: "IBM Plex Mono", "Menlo", "Consolas", monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font-body);
  background-color: var(--bg);
  background-image:
    radial-gradient(1200px 600px at 10% -10%, rgba(47, 208, 181, 0.16), transparent 60%),
    radial-gradient(900px 600px at 95% 0%, rgba(242, 193, 91, 0.14), transparent 60%),
    linear-gradient(180deg, #0b1118 0%, #0b1118 100%);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
  isolation: isolate;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: radial-gradient(circle at 1px 1px, rgba(255,255,255,0.03) 1px, transparent 0);
  background-size: 22px 22px;
  opacity: 0.4;
  pointer-events: none;
  z-index: 0;
}

header,
main,
footer {
  position: relative;
  z-index: 1;
}

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

code, .mono {
  font-family: var(--font-mono);
}

code {
  background: rgba(47, 208, 181, 0.12);
  border: 1px solid rgba(47, 208, 181, 0.2);
  border-radius: 6px;
  padding: 1px 4px;
  color: #d9f8f3;
}

.muted { color: var(--muted); }
.small { color: var(--muted); font-size: 12px; }

.topbar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  padding: 22px 24px 16px;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(15, 23, 35, 0.8), rgba(12, 18, 27, 0.65));
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

.title {
  max-width: 560px;
}

.eyebrow {
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 600;
}

.title h1 {
  margin: 6px 0 4px;
  font-size: 26px;
}

.subtitle {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.controls {
  display: grid;
  grid-template-columns: repeat(2, minmax(180px, 1fr));
  gap: 12px 16px;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--panel);
  box-shadow: var(--shadow);
  min-width: 320px;
}

.control {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 12px;
  color: var(--muted);
}

.control span {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.rangeWrap {
  display: flex;
  align-items: center;
  gap: 10px;
}

.rangeVal {
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  color: var(--text);
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 2px 8px;
}

.controls input[type="range"] {
  flex: 1;
  accent-color: var(--accent);
}

.controls select,
.controls input[type="number"] {
  background: var(--panel-strong);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px 10px;
  font-size: 13px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.controls select:focus,
.controls input[type="number"]:focus,
.controls input[type="range"]:focus {
  outline: none;
  border-color: rgba(47, 208, 181, 0.6);
  box-shadow: 0 0 0 2px rgba(47, 208, 181, 0.2);
}

button {
  font-family: var(--font-body);
}

.controls .primary {
  border: none;
  border-radius: 10px;
  padding: 10px 14px;
  background: linear-gradient(135deg, var(--accent), #56e0ca);
  color: #042b26;
  font-weight: 600;
  letter-spacing: 0.02em;
  cursor: pointer;
  box-shadow: 0 8px 18px rgba(45, 212, 191, 0.28);
  justify-self: end;
  grid-column: 1 / -1;
  transition: filter 0.2s ease;
}

.controls .primary:hover {
  filter: brightness(1.05);
}

.controls .primary:focus-visible {
  outline: 2px solid rgba(47, 208, 181, 0.8);
  outline-offset: 2px;
}

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 18px;
  padding: 18px 24px 24px;
  min-height: calc(100vh - 180px);
}

.graphPane {
  background: rgba(12, 18, 28, 0.75);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 12px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  min-height: 520px;
}

#cy {
  width: 100%;
  height: 100%;
  flex: 1;
  min-height: 500px;
  border-radius: 14px;
  background: linear-gradient(180deg, #0f1723 0%, #0c121b 100%);
  border: 1px solid rgba(255,255,255,0.05);
}

#panel {
  border: 1px solid var(--border);
  background: var(--panel);
  padding: 16px;
  overflow: auto;
  border-radius: 18px;
  box-shadow: var(--shadow);
}

#panel h2 { margin: 0 0 10px 0; font-size: 18px; }
#panel h3 { font-size: 14px; margin: 16px 0 6px; }
#panel ul { margin: 6px 0 0 16px; padding: 0; color: var(--muted); }
#panel li { margin-bottom: 6px; }

.details {
  background: rgba(14, 22, 32, 0.8);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 12px;
  padding: 12px;
  font-size: 13px;
  color: var(--muted);
}

.details b { color: var(--text); }

hr {
  border: none;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
  margin: 16px 0;
}

footer {
  border-top: 1px solid var(--border);
  padding: 12px 24px 20px;
  color: var(--muted);
  font-size: 12px;
}

@keyframes rise {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.topbar { animation: rise 0.6s ease both; }
.graphPane { animation: rise 0.7s ease both 0.05s; }
#panel { animation: rise 0.7s ease both 0.1s; }
footer { animation: rise 0.7s ease both 0.15s; }

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}

@media (max-width: 1100px) {
  .topbar {
    flex-direction: column;
    align-items: stretch;
  }

  .controls {
    width: 100%;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .layout {
    grid-template-columns: 1fr;
  }

  #panel {
    order: 2;
  }

  .graphPane {
    order: 1;
    min-height: 460px;
  }
}

@media (max-width: 720px) {
  .controls {
    grid-template-columns: 1fr;
  }

  .controls .primary {
    width: 100%;
    justify-self: stretch;
  }

  .title h1 {
    font-size: 22px;
  }

  .layout {
    padding: 14px;
  }

  #cy {
    min-height: 380px;
  }
}

/* --- Sequence Viewer --- */
.seqViewerWrap {
  margin-top: 12px;
  border-top: 1px solid var(--border);
  padding-top: 12px;
}

.seqViewerHeader {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 10px;
  margin-bottom: 10px;
}

.seqViewerTitle b {
  font-family: var(--font-display);
  font-weight: 600;
}

.seqViewerControls select {
  background: var(--panel-strong);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 8px;
  font-size: 12px;
}

.seqExampleViewer {
  margin-top: 8px;
}

.seqLegend {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 10px;
  font-size: 12px;
  color: var(--muted);
}

.legendItem {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.swatch {
  width: 14px;
  height: 10px;
  border-radius: 4px;
  border: 1px solid rgba(255,255,255,0.15);
  display: inline-block;
}

.swatch.beh { background: rgba(47, 208, 181, 0.28); }
.swatch.feat { background: rgba(242, 193, 91, 0.28); }
.swatch.both { background: rgba(122, 182, 255, 0.28); }
.swatch.top { outline: 2px solid rgba(242, 193, 91, 0.85); background: transparent; }

.seqMeta {
  background: rgba(16, 26, 36, 0.8);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px;
  margin-bottom: 10px;
  font-size: 12px;
  color: var(--muted);
}

.seqMeta .k { color: var(--text); }
.seqStats { margin-top: 8px; display: flex; flex-wrap: wrap; gap: 8px; }

.pill {
  border: 1px solid var(--border);
  background: rgba(12, 18, 28, 0.9);
  border-radius: 999px;
  padding: 4px 8px;
  font-size: 12px;
  color: var(--muted);
}

.seqBlock {
  border: 1px solid var(--border);
  background: rgba(12, 18, 28, 0.8);
  border-radius: 10px;
  padding: 10px;
  overflow-x: auto;
}

.seqLine {
  display: flex;
  align-items: baseline;
  gap: 10px;
  white-space: nowrap;
  margin: 2px 0;
}

.seqIdx {
  color: var(--muted);
  font-size: 12px;
  min-width: 52px;
  text-align: right;
}

.seqResidues {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.2px;
}

.aa {
  display: inline-block;
  width: 0.65em;
  text-align: center;
  border-radius: 4px;
  padding: 1px 0;
}

.aa.beh  { background: rgba(47, 208, 181, 0.22); }
.aa.feat { background: rgba(242, 193, 91, 0.22); }
.aa.both { background: rgba(122, 182, 255, 0.22); }

.aa.top {
  outline: 1.5px solid rgba(242, 193, 91, 0.9);
  outline-offset: -1px;
}