/* ============================================================
   MuonVis — global styles
   ============================================================ */

:root {
  --bg:          #0d1117;
  --bg-section:  #161b22;
  --bg-card:     #1c2128;
  --bg-ctrl:     #21262d;
  --border:      rgba(255,255,255,0.1);
  --text:        #e6edf3;
  --text-muted:  #8b949e;
  --accent:      #a29bfe;
  --radius:      8px;
  --font-mono:   'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
  --font-sans:   -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.5;
  overflow: hidden;
}

/* ============================================================
   Layout
   ============================================================ */

#header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  height: 52px;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 100;
}

#header h1 {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--text);
}

#header h1 span {
  color: var(--accent);
}

#nav-mount {
  flex: 1;
  display: flex;
  justify-content: center;
}

#app {
  height: calc(100vh - 52px);
  overflow: hidden;
  position: relative;
}

.section-container {
  position: absolute;
  inset: 0;
  overflow-y: auto;
  padding: 24px;
}

.section-container.hidden {
  display: none;
}

/* ============================================================
   Navigation
   ============================================================ */

.nav-wrapper {
  display: flex;
  align-items: center;
  gap: 8px;
}

.section-nav {
  display: flex;
  gap: 4px;
}

.nav-dot {
  position: relative;
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 12px;
  font-family: var(--font-sans);
  transition: all 0.15s;
  white-space: nowrap;
}

.nav-dot:hover { background: var(--bg-ctrl); color: var(--text); }
.nav-dot.active { background: var(--accent); color: #fff; border-color: var(--accent); }

.nav-label { font-size: 11px; }

.nav-arrow {
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 14px;
  transition: all 0.15s;
}

.nav-arrow:hover:not(:disabled) { background: var(--bg-ctrl); color: var(--text); }
.nav-arrow:disabled { opacity: 0.3; cursor: not-allowed; }

/* ============================================================
   Section layout
   ============================================================ */

.split-layout {
  display: flex;
  gap: 24px;
  align-items: flex-start;
}

.canvas-wrap {
  flex: 0 0 auto;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-section);
  border: 1px solid var(--border);
}

.canvas-wrap canvas {
  display: block;
}

.controls-wrap {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 220px;
  max-width: 320px;
}

/* ============================================================
   Controls
   ============================================================ */

.section-desc {
  color: var(--text-muted);
  font-size: 13px;
  line-height: 1.6;
  padding: 10px 12px;
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.section-desc b { color: var(--text); }
.section-desc i { color: var(--accent); font-style: normal; }

.control-row {
  display: grid;
  grid-template-columns: 110px 1fr 52px;
  align-items: center;
  gap: 8px;
}

.control-label {
  font-size: 12px;
  color: var(--text-muted);
  white-space: nowrap;
}

.control-value {
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--accent);
  text-align: right;
}

input[type="range"] {
  -webkit-appearance: none;
  width: 100%;
  height: 4px;
  border-radius: 2px;
  background: var(--bg-ctrl);
  outline: none;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  transition: transform 0.1s;
}

input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.2); }

.ctrl-btn {
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg-ctrl);
  color: var(--text);
  cursor: pointer;
  font-size: 12px;
  transition: all 0.12s;
}

.ctrl-btn:hover { background: var(--bg-card); border-color: var(--accent); color: var(--accent); }
.ctrl-btn:active { transform: scale(0.97); }

.button-row {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.control-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-muted);
  cursor: pointer;
  user-select: none;
}

.control-toggle input { cursor: pointer; accent-color: var(--accent); }

/* Matrix input */
.matrix-input { display: flex; flex-direction: column; gap: 6px; }
.matrix-label { font-size: 11px; color: var(--text-muted); }
.matrix-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px;
  width: 130px;
}

.matrix-cell {
  padding: 5px 8px;
  background: var(--bg-ctrl);
  border: 1px solid var(--border);
  border-radius: 5px;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 13px;
  width: 100%;
  text-align: center;
  outline: none;
}

.matrix-cell:focus { border-color: var(--accent); }

/* Collapsible */
.collapsible {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.collapsible summary {
  padding: 8px 12px;
  font-size: 12px;
  color: var(--text-muted);
  cursor: pointer;
  list-style: none;
  background: var(--bg-card);
  user-select: none;
}

.collapsible summary::-webkit-details-marker { display: none; }
.collapsible summary::before { content: '▶ '; font-size: 9px; }
.collapsible[open] summary::before { content: '▼ '; }

.collapsible .control-row { padding: 4px 12px; }
.collapsible[open] { padding-bottom: 8px; background: var(--bg-card); }

/* Info display */
.sv-info, .step-counter, .stage-label {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-muted);
  padding: 6px 10px;
  background: var(--bg-card);
  border-radius: 6px;
  border: 1px solid var(--border);
}

/* ============================================================
   Section 2 (NS) — specific layout
   ============================================================ */

.ns-wrap {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.ns-top-row {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.ns-inline-canvas { border-radius: 6px; overflow: hidden; display: block; }

/* ============================================================
   Section 4 (Landscape)
   ============================================================ */

.opt-section { display: flex; flex-direction: column; gap: 6px; }

.opt-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.opt-label { font-size: 12px; font-weight: 600; min-width: 40px; }

.opt-row .control-row { flex: 1; }

/* ============================================================
   Section 5 (Pipeline)
   ============================================================ */

.pipeline-wrap { padding: 16px; min-width: 400px; }

.pipeline-container { overflow-y: auto; max-height: calc(100vh - 120px); }

.pipeline-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}

.pipeline-grid.two-col {
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.pipeline-header {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  text-align: center;
  padding: 8px;
  background: var(--bg-card);
  border-radius: 6px 6px 0 0;
  border: 1px solid var(--border);
  border-bottom: none;
}

.adam-header { color: #1dd1a1; }

.pipeline-stage {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 2px;
  cursor: pointer;
  transition: all 0.15s;
  background: var(--bg-card);
  position: relative;
}

.pipeline-stage:hover { background: var(--bg-ctrl); }

.pipeline-stage.active {
  border-color: var(--accent);
  background: rgba(162,155,254,0.07);
}

.pipeline-stage.done { opacity: 0.6; }

.adam-stage { cursor: default; }
.adam-stage:hover { background: var(--bg-card); }

.stage-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 4px;
}

.stage-text { display: flex; flex-direction: column; gap: 2px; }

.stage-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
}

.stage-desc {
  font-size: 11px;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.pipeline-arrow {
  text-align: center;
  color: var(--text-muted);
  font-size: 18px;
  line-height: 1;
  padding: 2px 0;
}

.stage-detail {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

/* ============================================================
   Scrollbar
   ============================================================ */

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* ============================================================
   Responsive
   ============================================================ */

@media (max-width: 900px) {
  .split-layout { flex-direction: column; }
  .controls-wrap { max-width: 100%; }
  .section-container { padding: 16px; }
  .nav-label { display: none; }
}