/* ============================================================
   Deterministic Digital Twin Viewer — Styles
   Aesthetic: Industrial control-room / telemetry dark theme
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@300;400;500;600;700&family=DM+Sans:wght@400;500;600;700&display=swap');

:root {
  /* Core palette */
  --bg-0: #0a0c10;
  --bg-1: #11141b;
  --bg-2: #181c26;
  --bg-3: #1f2533;
  --bg-card: #151923;
  --border: #2a3040;
  --border-bright: #3a4560;

  /* Text */
  --text-0: #e8ecf4;
  --text-1: #b0b8cc;
  --text-2: #6e7a94;
  --text-3: #4a5570;

  /* Accents */
  --green: #2dd4a0;
  --green-dim: #1a8c6a;
  --green-glow: rgba(45, 212, 160, 0.15);
  --amber: #f5a623;
  --amber-dim: #b87d1a;
  --blue: #5b9bf5;
  --blue-dim: #3a6ec0;
  --red: #f55b6e;
  --red-dim: #b83a4a;
  --cyan: #5be0f5;

  /* Spacing */
  --gap: 16px;
  --radius: 6px;
  --radius-lg: 10px;

  /* Fonts */
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --font-sans: 'DM Sans', system-ui, sans-serif;
}

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

html {
  scroll-behavior: smooth;
  font-size: 15px;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-0);
  color: var(--text-1);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

body.embed-mode {
  background: transparent;
}
body.embed-mode .hero { display: none !important; }
body.embed-mode .viewer-section { padding-top: 8px; }

/* ---- Noise overlay for depth ---- */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.025'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 0;
}

/* ---- Layout ---- */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* =============== HERO =============== */
.hero {
  padding: 64px 0 48px;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(45,212,160,0.03) 0%, transparent 60%);
}

.hero-inner {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.hero h1 {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-0);
  letter-spacing: -0.5px;
  line-height: 1.2;
}

.hero h1 .accent { color: var(--green); }

.badge-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: var(--green-glow);
  border: 1px solid var(--green-dim);
  border-radius: 100px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--green);
  text-decoration: none;
  transition: background 0.2s, border-color 0.2s, box-shadow 0.2s;
  cursor: pointer;
}
.badge:hover {
  background: rgba(45,212,160,0.25);
  border-color: var(--green);
  box-shadow: 0 0 20px rgba(45,212,160,0.12);
}
.badge .dot {
  width: 8px; height: 8px;
  background: var(--green);
  border-radius: 50%;
  animation: pulse-dot 2s ease-in-out infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero-desc {
  max-width: 680px;
  font-size: 0.95rem;
  color: var(--text-2);
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  padding-top: 4px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: var(--radius);
  font-family: var(--font-sans);
  font-size: 0.88rem;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s;
}
.btn-primary {
  background: var(--green);
  color: var(--bg-0);
  border-color: var(--green);
}
.btn-primary:hover { background: #3ee4b0; box-shadow: 0 0 24px rgba(45,212,160,0.2); }

.btn-secondary {
  background: transparent;
  color: var(--text-1);
  border-color: var(--border-bright);
}
.btn-secondary:hover { border-color: var(--text-2); color: var(--text-0); }

/* =============== VIEWER SECTION =============== */
.viewer-section {
  padding: 40px 0 80px;
}

.viewer-header {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: flex-end;
  margin-bottom: 24px;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 5px;
}
.control-group label {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-3);
  font-family: var(--font-mono);
}

select, button.ctrl-btn {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  background: var(--bg-2);
  color: var(--text-0);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 8px 14px;
  cursor: pointer;
  transition: border-color 0.2s;
  outline: none;
}
select:hover, button.ctrl-btn:hover { border-color: var(--border-bright); }
select:focus, button.ctrl-btn:focus { border-color: var(--blue); }

select { padding-right: 28px; appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%236e7a94'%3E%3Cpath d='M2 4l4 4 4-4'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
}

/* Playback bar */
.playback-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 10px 18px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.playback-bar button {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-1);
  border-radius: var(--radius);
  width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  font-size: 1rem;
  transition: all 0.15s;
}
.playback-bar button:hover { border-color: var(--blue); color: var(--blue); }
.playback-bar button.active { border-color: var(--green); color: var(--green); background: var(--green-glow); }

.scrubber-wrap {
  flex: 1;
  min-width: 200px;
  display: flex;
  align-items: center;
  gap: 10px;
}

input[type="range"] {
  flex: 1;
  -webkit-appearance: none;
  appearance: none;
  height: 6px;
  background: var(--bg-3);
  border-radius: 3px;
  outline: none;
  cursor: pointer;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px; height: 16px;
  background: var(--blue);
  border-radius: 50%;
  border: 2px solid var(--bg-0);
  box-shadow: 0 0 8px rgba(91,155,245,0.3);
}
input[type="range"]::-moz-range-thumb {
  width: 16px; height: 16px;
  background: var(--blue);
  border-radius: 50%;
  border: 2px solid var(--bg-0);
}

.time-display {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-2);
  white-space: nowrap;
  min-width: 110px;
}

.speed-btns {
  display: flex;
  gap: 4px;
}
.speed-btns button {
  width: auto;
  padding: 0 10px;
  font-size: 0.72rem;
  font-family: var(--font-mono);
}

/* Compare toggle */
.compare-toggle {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: auto;
}
.compare-toggle label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-2);
  cursor: pointer;
}
.toggle-switch {
  position: relative;
  width: 42px; height: 22px;
}
.toggle-switch input { opacity: 0; width: 0; height: 0; }
.toggle-switch .slider {
  position: absolute;
  inset: 0;
  background: var(--bg-3);
  border-radius: 11px;
  border: 1px solid var(--border);
  cursor: pointer;
  transition: 0.3s;
}
.toggle-switch .slider::before {
  content: '';
  position: absolute;
  width: 16px; height: 16px;
  left: 2px; bottom: 2px;
  background: var(--text-2);
  border-radius: 50%;
  transition: 0.3s;
}
.toggle-switch input:checked + .slider { background: var(--green-dim); border-color: var(--green); }
.toggle-switch input:checked + .slider::before { transform: translateX(20px); background: var(--green); }

/* ---- Cards / Panels ---- */
.panel-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--gap);
  margin-bottom: 20px;
}

.panel {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-2);
}
.panel-head .tag {
  font-size: 0.66rem;
  padding: 2px 8px;
  border-radius: 100px;
  background: var(--bg-3);
  color: var(--text-3);
  font-weight: 500;
}

.panel-body {
  padding: 16px;
}

/* Numeric readouts */
.readout-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.readout {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.readout-label {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-3);
}
.readout-value {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-0);
}
.readout-value.green { color: var(--green); }
.readout-value.amber { color: var(--amber); }
.readout-value.red { color: var(--red); }
.readout-value.blue { color: var(--blue); }

/* Chart containers */
.chart-container {
  position: relative;
  width: 100%;
  height: 220px;
}

/* ---- Results / Summary panel ---- */
.results-panel {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  margin-top: 20px;
  overflow: hidden;
}
.results-panel .panel-head { border-bottom: 1px solid var(--border); }
.results-body {
  padding: 20px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-1);
  line-height: 1.8;
  max-height: 400px;
  overflow-y: auto;
}
.results-body h1, .results-body h2, .results-body h3 {
  font-family: var(--font-sans);
  color: var(--text-0);
  margin: 16px 0 8px;
}
.results-body h1 { font-size: 1.2rem; }
.results-body h2 { font-size: 1rem; }
.results-body h3 { font-size: 0.9rem; }
.results-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0;
  font-size: 0.75rem;
}
.results-body th, .results-body td {
  padding: 6px 10px;
  border: 1px solid var(--border);
  text-align: left;
}
.results-body th {
  background: var(--bg-2);
  color: var(--text-2);
  font-weight: 600;
}
.results-body td { color: var(--text-1); }
.results-body strong { color: var(--text-0); }
.results-body code {
  background: var(--bg-2);
  padding: 1px 5px;
  border-radius: 3px;
  font-size: 0.78rem;
}
.results-body blockquote {
  border-left: 3px solid var(--green-dim);
  padding-left: 14px;
  color: var(--text-2);
  margin: 12px 0;
}
.results-body ul, .results-body ol { padding-left: 20px; }

/* ---- Compare panel ---- */
.compare-result {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin-bottom: 20px;
  display: none;
}
.compare-result.show { display: block; }
.compare-result .verdict {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
}
.compare-result .verdict.pass { color: var(--green); }
.compare-result .verdict.fail { color: var(--red); }
.compare-result .verdict .icon { font-size: 1.6rem; }
.compare-detail {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-2);
  line-height: 1.7;
}
.diff-snippet {
  margin-top: 10px;
  padding: 12px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.72rem;
  overflow-x: auto;
  white-space: pre;
  color: var(--text-1);
}

/* ---- Meta info bar ---- */
.meta-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  padding: 14px 18px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  margin-bottom: 20px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
}
.meta-item {
  display: flex;
  gap: 6px;
}
.meta-item .mk { color: var(--text-3); }
.meta-item .mv { color: var(--text-1); }

/* ---- Loading / Status ---- */
.status-msg {
  padding: 40px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-3);
}
.status-msg.error { color: var(--red); }

.spinner {
  display: inline-block;
  width: 20px; height: 20px;
  border: 2px solid var(--border-bright);
  border-top-color: var(--blue);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  vertical-align: middle;
  margin-right: 8px;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---- Footer ---- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 24px 0;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-3);
}

/* ---- Responsive ---- */
@media (max-width: 768px) {
  .hero h1 { font-size: 1.5rem; }
  .panel-grid { grid-template-columns: 1fr; }
  .readout-grid { grid-template-columns: 1fr; }
  .playback-bar { padding: 8px 12px; gap: 8px; }
  .container { padding: 0 12px; }
}

/* ---- Scrollbar ---- */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg-1); }
::-webkit-scrollbar-thumb { background: var(--border-bright); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-3); }