/* ══════════════════════════════════════════════════════════
   PhysCom — Dark Mathematical Serenity Theme
   ══════════════════════════════════════════════════════════ */

/* ── Custom Properties ──────────────────────────────────── */
:root {
  --bg-deep:       #0d1117;
  --bg-surface:    #161b22;
  --bg-card:       #1c2128;
  --bg-elevated:   #252c35;
  --border:        #2a3140;
  --border-subtle: #222833;

  --text-primary:  #d4dae3;
  --text-secondary:#8b95a5;
  --text-muted:    #5c6575;
  --text-faint:    #3d4555;

  --accent-gold:   #c9a84c;
  --accent-blue:   #6b9fbd;
  --accent-teal:   #6ba3a0;
  --accent-green:  #7aab8a;
  --accent-red:    #b85c5c;
  --accent-amber:  #b8935c;
  --accent-violet: #9b8ec4;

  --font-body:     'Inter', system-ui, -apple-system, sans-serif;
  --font-mono:     'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
  --font-display:  'Cormorant Garamond', 'Garamond', 'Georgia', serif;

  --radius:        6px;
  --radius-lg:     10px;
}

/* ── Reset & Base ───────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: var(--font-body);
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-deep);
  min-height: 100vh;
}

/* Subtle grid texture on body */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(var(--border-subtle) 1px, transparent 1px),
    linear-gradient(90deg, var(--border-subtle) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.25;
  pointer-events: none;
  z-index: 0;
}

body > * { position: relative; z-index: 1; }

a { color: var(--accent-blue); text-decoration: none; transition: color 0.2s; }
a:hover { color: #8dbdd6; text-decoration: none; }

::selection {
  background: rgba(107, 159, 189, 0.3);
  color: var(--text-primary);
}

/* ── Nav ─────────────────────────────────────────────────── */
nav {
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 1.5rem;
  gap: 2rem;
  height: 52px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--text-primary) !important;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.2rem;
  letter-spacing: 0.04em;
  text-decoration: none !important;
}
.nav-brand img {
  width: 28px;
  height: 28px;
  opacity: 0.9;
}
.nav-brand:hover { color: var(--accent-gold) !important; }
.nav-brand:hover img { opacity: 1; }

nav ul { list-style: none; display: flex; gap: 0.25rem; }
nav a {
  color: var(--text-secondary);
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius);
  font-size: 0.88rem;
  font-weight: 500;
  transition: color 0.2s, background 0.2s;
}
nav a:hover {
  color: var(--text-primary);
  background: var(--bg-elevated);
  text-decoration: none;
}

/* ── Main ────────────────────────────────────────────────── */
main {
  max-width: 1100px;
  margin: 1.5rem auto;
  padding: 0 1.25rem;
}

/* ── Page header ─────────────────────────────────────────── */
.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

h1 {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}
h2 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 1.25rem 0 0.5rem;
}
h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
  color: var(--text-primary);
}
.subtitle { font-weight: 400; color: var(--text-secondary); font-size: 0.9rem; }

/* ── Cards ───────────────────────────────────────────────── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1rem 1.25rem;
  margin-bottom: 1rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1rem;
}
.card-grid > * { min-width: 0; overflow-x: auto; }

/* ── Tables ──────────────────────────────────────────────── */
table { width: 100%; border-collapse: collapse; font-size: 0.88rem; }
th, td {
  padding: 0.5rem 0.6rem;
  text-align: left;
  border-bottom: 1px solid var(--border-subtle);
}
th {
  font-weight: 600;
  color: var(--text-muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
tr:hover td { background: rgba(107, 159, 189, 0.04); }
table.compact th, table.compact td { padding: 0.25rem 0.4rem; font-size: 0.83rem; }

/* ── Score cells ─────────────────────────────────────────── */
.score-cell {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.85rem;
  color: var(--accent-gold);
}

/* ── Badges ──────────────────────────────────────────────── */
.badge {
  display: inline-block;
  padding: 0.15rem 0.55rem;
  border-radius: 4px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  background: var(--bg-elevated);
  color: var(--text-secondary);
  border: 1px solid var(--border);
}
.badge-requires  { background: rgba(107,159,189,0.12); color: var(--accent-blue);   border-color: rgba(107,159,189,0.25); }
.badge-provides  { background: rgba(122,171,138,0.12); color: var(--accent-green);  border-color: rgba(122,171,138,0.25); }
.badge-range_min,
.badge-range_max { background: rgba(184,147,92,0.12);  color: var(--accent-amber);  border-color: rgba(184,147,92,0.25); }
.badge-excludes  { background: rgba(184,92,92,0.12);   color: var(--accent-red);    border-color: rgba(184,92,92,0.25); }
.badge-valid     { background: rgba(122,171,138,0.12); color: var(--accent-green);  border-color: rgba(122,171,138,0.25); }
.badge-p1_fail,
.badge-p2_fail,
.badge-p3_fail,
.badge-p4_fail   { background: rgba(184,92,92,0.12);   color: var(--accent-red);    border-color: rgba(184,92,92,0.25); }
.badge-scored    { background: rgba(107,159,189,0.12); color: var(--accent-blue);   border-color: rgba(107,159,189,0.25); }
.badge-llm_reviewed { background: rgba(107,163,160,0.12); color: var(--accent-teal); border-color: rgba(107,163,160,0.25); }
.badge-reviewed  { background: rgba(155,142,196,0.12); color: var(--accent-violet); border-color: rgba(155,142,196,0.25); }
.badge-pending   { background: rgba(184,147,92,0.12);  color: var(--accent-amber);  border-color: rgba(184,147,92,0.25); }
.badge-rating-low    { background: rgba(184,92,92,0.12);   color: var(--accent-red);    border-color: rgba(184,92,92,0.25); }
.badge-rating-medium { background: rgba(184,147,92,0.12);  color: var(--accent-amber);  border-color: rgba(184,147,92,0.25); }
.badge-rating-high   { background: rgba(122,171,138,0.12); color: var(--accent-green);  border-color: rgba(122,171,138,0.25); }

/* ── Buttons ─────────────────────────────────────────────── */
.btn {
  display: inline-block;
  padding: 0.4rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-elevated);
  color: var(--text-primary);
  font-size: 0.85rem;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}
.btn:hover {
  background: var(--bg-card);
  border-color: var(--text-muted);
  text-decoration: none;
}
.btn-primary {
  background: rgba(107,159,189,0.15);
  color: var(--accent-blue);
  border-color: rgba(107,159,189,0.35);
}
.btn-primary:hover {
  background: rgba(107,159,189,0.25);
  border-color: rgba(107,159,189,0.5);
}
.btn-danger {
  background: rgba(184,92,92,0.12);
  color: var(--accent-red);
  border-color: rgba(184,92,92,0.3);
}
.btn-danger:hover {
  background: rgba(184,92,92,0.22);
  border-color: rgba(184,92,92,0.5);
}
.btn-sm { padding: 0.2rem 0.55rem; font-size: 0.8rem; }

/* ── Forms ───────────────────────────────────────────────── */
.form-group { margin-bottom: 0.75rem; }
.form-group label {
  display: block;
  font-weight: 600;
  font-size: 0.85rem;
  margin-bottom: 0.25rem;
  color: var(--text-primary);
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.45rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.9rem;
  background: var(--bg-surface);
  color: var(--text-primary);
  transition: border-color 0.2s;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 2px rgba(107,159,189,0.15);
}
.form-actions { margin-top: 1rem; display: flex; gap: 0.5rem; }
.form-row { display: flex; gap: 0.5rem; align-items: center; flex-wrap: wrap; }
.form-row input, .form-row select { width: auto; flex: 1; min-width: 80px; }

fieldset {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.75rem;
  margin-bottom: 0.75rem;
}
legend {
  font-weight: 600;
  font-size: 0.85rem;
  padding: 0 0.3rem;
  color: var(--text-primary);
}
.checkbox-row { display: flex; gap: 1rem; flex-wrap: wrap; }
.checkbox-row label {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.9rem;
  color: var(--text-primary);
}

/* Custom checkbox styling */
input[type="checkbox"] {
  appearance: none;
  width: 16px;
  height: 16px;
  border: 1px solid var(--text-muted);
  border-radius: 3px;
  background: var(--bg-surface);
  cursor: pointer;
  flex-shrink: 0;
  position: relative;
  transition: background 0.15s, border-color 0.15s;
}
input[type="checkbox"]:checked {
  background: var(--accent-blue);
  border-color: var(--accent-blue);
}
input[type="checkbox"]:checked::after {
  content: '';
  position: absolute;
  left: 4px;
  top: 1px;
  width: 5px;
  height: 9px;
  border: solid var(--bg-deep);
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}
input[type="checkbox"]:focus {
  outline: none;
  box-shadow: 0 0 0 2px rgba(107,159,189,0.2);
}

/* ── Inline form (for delete buttons) ────────────────────── */
.inline-form { display: inline; }

/* ── Flash messages ──────────────────────────────────────── */
.flash-container { margin-bottom: 1rem; }
.flash {
  padding: 0.6rem 1rem;
  border-radius: var(--radius);
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
  border: 1px solid;
}
.flash-success { background: rgba(122,171,138,0.1); color: var(--accent-green); border-color: rgba(122,171,138,0.25); }
.flash-error   { background: rgba(184,92,92,0.1);   color: var(--accent-red);   border-color: rgba(184,92,92,0.25); }
.flash-info    { background: rgba(107,159,189,0.1); color: var(--accent-blue);  border-color: rgba(107,159,189,0.25); }

/* ── Filter row ──────────────────────────────────────────── */
.filter-row { display: flex; gap: 0.5rem; align-items: center; margin-bottom: 1rem; }
.filter-row span { font-weight: 600; font-size: 0.85rem; color: var(--text-muted); }

/* ── DL styling ──────────────────────────────────────────── */
dl { display: grid; grid-template-columns: auto 1fr; gap: 0.3rem 1rem; }
dt { font-weight: 600; font-size: 0.83rem; color: var(--text-muted); }
dd { font-size: 0.9rem; color: var(--text-primary); }

/* ── Empty state ─────────────────────────────────────────── */
.empty {
  color: var(--text-muted);
  padding: 2.5rem 0;
  text-align: center;
  font-style: italic;
}

/* ── Actions column ──────────────────────────────────────── */
.actions { white-space: nowrap; display: flex; gap: 0.25rem; }

/* ── Dep add form ────────────────────────────────────────── */
.dep-add-form { margin-top: 0.75rem; }

/* ── Form hints ──────────────────────────────────────────── */
.form-hint { color: var(--text-muted); font-size: 0.8rem; margin-bottom: 0.25rem; font-weight: 400; }

/* ── Vertical checkbox list ──────────────────────────────── */
.checkbox-col { display: flex; flex-direction: column; gap: 0.6rem; }
.checkbox-col label {
  display: flex;
  align-items: baseline;
  gap: 0.4rem;
  font-size: 0.9rem;
  color: var(--text-primary);
}
.checkbox-col label .form-hint { display: block; margin-left: 1.3rem; }

/* ── Summary DL (pipeline) ───────────────────────────────── */
.summary-dl { display: grid; grid-template-columns: auto 1fr; gap: 0.15rem 1rem; }

/* ── Pipeline run status ──────────────────────────────────── */
.badge-running      { background: rgba(107,159,189,0.12); color: var(--accent-blue);   border-color: rgba(107,159,189,0.25); }
.badge-completed    { background: rgba(122,171,138,0.12); color: var(--accent-green);  border-color: rgba(122,171,138,0.25); }
.badge-failed       { background: rgba(184,92,92,0.12);   color: var(--accent-red);    border-color: rgba(184,92,92,0.25); }
.badge-cancelled    { background: rgba(184,147,92,0.12);  color: var(--accent-amber);  border-color: rgba(184,147,92,0.25); }
.badge-rate_limited { background: rgba(184,147,92,0.12);  color: var(--accent-amber);  border-color: rgba(184,147,92,0.25); }

.run-status { padding: 0.25rem 0; }
.run-status-header { display: flex; align-items: center; gap: 0.5rem; margin-bottom: 0.5rem; }
.run-status-label { font-weight: 600; font-size: 0.9rem; color: var(--text-primary); }

.progress-bar-container {
  background: var(--bg-elevated);
  border-radius: 4px;
  height: 8px;
  overflow: hidden;
  margin-bottom: 0.35rem;
  border: 1px solid var(--border-subtle);
}
.progress-bar {
  background: linear-gradient(90deg, var(--accent-blue), var(--accent-teal));
  height: 100%;
  border-radius: 3px;
  transition: width 0.3s ease;
}

.run-status-counters {
  display: flex;
  gap: 1rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
}

.run-status-actions { margin-top: 0.35rem; }

/* ── Block reason ───────────────────────────────────────── */
.block-reason-cell {
  font-size: 0.8rem;
  color: var(--text-muted);
  max-width: 350px;
  word-break: break-word;
}

/* ── Metric position bar ────────────────────────────────── */
.metric-bar-container {
  display: inline-block;
  width: 60px;
  height: 6px;
  background: var(--bg-elevated);
  border-radius: 3px;
  overflow: hidden;
  vertical-align: middle;
  border: 1px solid var(--border-subtle);
}
.metric-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-blue), var(--accent-gold));
  border-radius: 2px;
}
.metric-bar-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-left: 0.3rem;
}

/* ── Mass allocation bar (optimizer) ───────────────────────── */
.mass-bar-container {
  display: flex;
  width: 100%;
  height: 18px;
  border-radius: 4px;
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  margin-top: 0.5rem;
}
.mass-bar-seg { height: 100%; }
.mass-bar-platform { background: var(--accent-blue); }
.mass-bar-actuator { background: var(--accent-gold); }
.mass-bar-storage   { background: var(--accent-teal); }
.mass-bar-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.4rem;
  align-items: center;
}
.mass-swatch {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 2px;
  margin-right: 0.35rem;
  vertical-align: middle;
}
.optimize-summary { margin-bottom: 0.25rem; }
.optimize-score { display: flex; flex-direction: column; gap: 0.1rem; }

/* ── Importance sliders (optimizer) ────────────────────────── */
.weight-slider-row {
  display: grid;
  grid-template-columns: 140px 1fr 48px;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
}
.weight-slider-row label { font-size: 0.85rem; color: var(--text-muted); }
.weight-slider-row output { font-size: 0.85rem; text-align: right; font-variant-numeric: tabular-nums; }
.weight-slider-row input[type="range"] { width: 100%; }

/* ── Select dropdown dark styling ────────────────────────── */
select option {
  background: var(--bg-surface);
  color: var(--text-primary);
}

/* ── Scrollbar (WebKit) ──────────────────────────────────── */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg-deep); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ══════════════════════════════════════════════════════════
   Homepage
   ══════════════════════════════════════════════════════════ */

/* ── Hero ────────────────────────────────────────────────── */
.hero {
  text-align: center;
  padding: 3rem 1rem 2.5rem;
}
.hero-logo img {
  width: 72px;
  height: 72px;
  margin-bottom: 1rem;
  opacity: 0.85;
}
.hero-title {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  color: var(--text-primary);
  margin-bottom: 0.6rem;
}
.hero-subtitle {
  max-width: 600px;
  margin: 0 auto 1.5rem;
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--text-secondary);
}
.hero-actions {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
}

/* ── Section headings ────────────────────────────────────── */
.section-heading {
  font-size: 1.15rem;
  font-weight: 600;
  margin: 2rem 0 0.35rem;
  color: var(--text-primary);
  padding-bottom: 0.35rem;
  border-bottom: 1px solid var(--border);
}
.section-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
  max-width: 700px;
}

/* ── Pipeline steps ──────────────────────────────────────── */
.pipeline-steps {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-bottom: 1.5rem;
}
.step-card {
  display: flex;
  gap: 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1rem 1.25rem;
}
.step-number {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  background: rgba(107,159,189,0.12);
  color: var(--accent-blue);
  border: 1px solid rgba(107,159,189,0.25);
}
.step-body h3 {
  font-size: 0.95rem;
  margin-bottom: 0.3rem;
}
.step-body p {
  font-size: 0.87rem;
  color: var(--text-secondary);
  line-height: 1.6;
}
.step-example {
  margin-top: 0.5rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  padding: 0.4rem 0.65rem;
  background: var(--bg-surface);
  border-radius: var(--radius);
  border-left: 2px solid var(--border);
}
.step-example code {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent-gold);
}
.step-connector {
  width: 1px;
  height: 16px;
  background: var(--border);
  margin-left: 39px;
}

/* ── Concepts grid ───────────────────────────────────────── */
.concepts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.concept-card p {
  font-size: 0.87rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 0.6rem;
}
.concept-card em { color: var(--text-primary); font-style: normal; font-weight: 500; }
.concept-card code {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-gold);
  background: var(--bg-surface);
  padding: 0.1rem 0.35rem;
  border-radius: 3px;
}
.concept-examples {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 0.6rem;
}
.concept-link {
  font-size: 0.83rem;
  color: var(--accent-blue);
}

/* ── Stats row ───────────────────────────────────────────── */
.stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1rem;
  text-align: center;
}
.stat-value {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 500;
  color: var(--accent-gold);
  line-height: 1.2;
}
.stat-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-top: 0.25rem;
}

/* ── Admin warning box ──────────────────────────────────── */
.warning-box {
  border-color: rgba(184,147,92,0.4);
  background: rgba(184,147,92,0.06);
}

/* ── Google Fonts import ─────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:wght@400;500;600&family=Inter:wght@400;500;600&family=JetBrains+Mono:wght@400;500&display=swap');