/* ── Score Page Design Tokens ──────────────────────────────────────────────── */
:root {
  --bg: #0a0c10;
  --bg-card: #111318;
  --bg-code: #161920;
  --border: rgba(255, 255, 255, 0.08);
  --border-accent: rgba(255, 255, 255, 0.12);
  --text-primary: #e8e8ec;
  --text-secondary: #8b8d97;
  --text-muted: rgba(255, 255, 255, 0.4);
  --accent-blue: #4a8eff;
  --accent-green: #34d399;
  --accent-orange: #f59e0b;
  --accent-red: #ef4444;
  --accent-yellow: #fbbf24;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --transition: 0.3s var(--ease);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  line-height: 1.7;
}

/* Subtle side gradient glow */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 200px;
  height: 100%;
  background: linear-gradient(180deg,
    rgba(30, 58, 138, 0.15) 0%,
    rgba(30, 58, 138, 0.05) 40%,
    rgba(59, 130, 246, 0.08) 70%,
    transparent 100%
  );
  pointer-events: none;
  z-index: 0;
}

body::after {
  content: '';
  position: fixed;
  top: 0;
  right: 0;
  width: 200px;
  height: 100%;
  background: linear-gradient(180deg,
    transparent 0%,
    rgba(59, 130, 246, 0.06) 50%,
    rgba(30, 58, 138, 0.1) 100%
  );
  pointer-events: none;
  z-index: 0;
}

/* ── Navigation ────────────────────────────────────────────────────────────── */
#score-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  padding: 20px 32px;
  z-index: 100;
  background: linear-gradient(to bottom, var(--bg) 40%, transparent);
}

.back-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: -0.26px;
  transition: color var(--transition);
}

.back-link:hover {
  color: var(--text-primary);
}

/* ── Main Layout ───────────────────────────────────────────────────────────── */
#score-main {
  max-width: 700px;
  margin: 0 auto;
  padding: 100px 32px 60px;
  position: relative;
  z-index: 1;
}

/* ── Hero Section ──────────────────────────────────────────────────────────── */
.hero-section {
  margin-bottom: 48px;
  animation: fadeInUp 0.6s var(--ease);
}

.hero-section h1 {
  font-size: 42px;
  font-weight: 700;
  letter-spacing: -1.5px;
  line-height: 1.15;
  color: #fff;
  margin-bottom: 16px;
}

.updated-badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 20px;
  border: 1px solid rgba(52, 211, 153, 0.3);
  color: var(--accent-green);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.5px;
  margin-bottom: 12px;
}

.subtitle {
  color: var(--text-secondary);
  font-size: 16px;
  font-weight: 400;
}

/* ── Short Version Card ────────────────────────────────────────────────────── */
.content-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px;
  margin-bottom: 64px;
  animation: fadeInUp 0.6s var(--ease) 0.1s both;
}

.card-label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--accent-blue);
  margin-bottom: 16px;
}

.content-card p {
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-primary);
}

.content-card strong {
  color: #fff;
}

.content-card em {
  font-style: normal;
  text-decoration: underline;
  text-decoration-color: rgba(255,255,255,0.2);
  text-underline-offset: 3px;
}

/* ── Text Sections ─────────────────────────────────────────────────────────── */
.text-section {
  margin-bottom: 64px;
}

.section-title {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 1.2px;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.section-rule {
  width: 100%;
  height: 1px;
  background: var(--border);
  margin-bottom: 40px;
}

.text-section p {
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

.text-section strong {
  color: var(--text-primary);
  font-weight: 600;
}

.text-section em {
  color: var(--text-primary);
  font-style: italic;
}

/* ── Lists ─────────────────────────────────────────────────────────────────── */
.reasons-list, .details-list {
  list-style: none;
  margin: 24px 0;
}

.reasons-list li, .details-list li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 16px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-secondary);
}

.reasons-list li::before, .details-list li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--accent-blue);
  font-weight: 700;
}

.reasons-list li strong, .details-list li strong {
  color: var(--text-primary);
}

/* ── Pipeline Steps ────────────────────────────────────────────────────────── */
.pipeline-step {
  margin-bottom: 40px;
}

.step-number {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.8px;
  color: var(--accent-blue);
  margin-bottom: 16px;
}

.sub-heading {
  font-size: 18px;
  font-weight: 600;
  color: #fff;
  margin-top: 32px;
  margin-bottom: 12px;
}

/* ── Code Blocks ───────────────────────────────────────────────────────────── */
.code-block {
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px 24px;
  margin: 16px 0 20px;
  overflow-x: auto;
}

.code-block code {
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  font-size: 13px;
  line-height: 1.9;
  color: var(--text-secondary);
}

.code-highlight {
  color: var(--accent-green);
  font-weight: 600;
}

.code-penalty {
  color: var(--accent-red);
  font-weight: 600;
}

.code-value {
  color: var(--accent-orange);
}

/* ── Formula Blocks ────────────────────────────────────────────────────────── */
.formula-block {
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px 24px;
  margin: 16px 0 20px;
  text-align: center;
}

.formula-text {
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  font-size: 15px;
  color: var(--text-primary);
  font-weight: 500;
}

.formula-text sup {
  font-size: 11px;
}

/* ── S-Curve Chart ─────────────────────────────────────────────────────────── */
.chart-container {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px 24px 20px;
  margin: 32px 0;
  overflow: hidden;
}

#score-curve-canvas {
  width: 100%;
  height: auto;
  display: block;
}

.chart-caption {
  text-align: center;
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 16px;
  line-height: 1.5;
}

/* ── Interactive Demo ──────────────────────────────────────────────────────── */
.interactive-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 12px;
}

.interactive-badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 6px;
  background: var(--accent-yellow);
  color: #000;
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.8px;
}

.interactive-title {
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.8px;
  color: #fff;
}

.interactive-desc {
  color: var(--text-secondary);
  font-size: 15px;
  margin-bottom: 24px;
  line-height: 1.6;
}

/* Demo Card */
.demo-card {
  background: var(--bg-card);
  border: 1px solid var(--border-accent);
  border-radius: 16px;
  padding: 28px;
  margin-top: 8px;
}

.demo-colors {
  display: flex;
  gap: 12px;
  margin-bottom: 24px;
}

.demo-color-box {
  flex: 1;
  height: 120px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.1);
  position: relative;
  transition: background-color 0.15s var(--ease);
  overflow: hidden;
}

.demo-color-label {
  position: absolute;
  bottom: 10px;
  left: 12px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.8px;
  color: rgba(255,255,255,0.7);
  text-shadow: 0 1px 4px rgba(0,0,0,0.5);
}

/* Score Display */
.demo-score-row {
  margin-bottom: 20px;
}

.demo-score-value {
  font-size: 48px;
  font-weight: 700;
  letter-spacing: -2px;
  color: var(--accent-orange);
  font-variant-numeric: tabular-nums;
  transition: color 0.3s var(--ease);
}

.demo-score-max {
  font-size: 20px;
  font-weight: 500;
  color: var(--text-muted);
  margin-left: 4px;
}

/* Metrics Row */
.demo-metrics {
  display: flex;
  gap: 1px;
  background: var(--border);
  border-radius: 10px;
  overflow: hidden;
  margin-bottom: 24px;
}

.demo-metric {
  flex: 1;
  background: var(--bg-code);
  padding: 14px 16px;
  text-align: center;
}

.metric-value {
  display: block;
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  font-variant-numeric: tabular-nums;
  margin-bottom: 2px;
}

.metric-label {
  font-size: 11px;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0.3px;
}

/* Horizontal Sliders */
.demo-sliders {
  margin-bottom: 20px;
}

.demo-slider-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}

.demo-slider-label {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  width: 80px;
  flex-shrink: 0;
}

.demo-slider-val {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  width: 44px;
  text-align: right;
  flex-shrink: 0;
  font-variant-numeric: tabular-nums;
}

/* Range Input Styling */
.demo-range {
  -webkit-appearance: none;
  appearance: none;
  flex: 1;
  height: 4px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.1);
  outline: none;
  cursor: pointer;
}

.demo-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #fff;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(0,0,0,0.4);
  transition: transform 0.15s var(--ease);
}

.demo-range::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

.demo-range::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #fff;
  cursor: pointer;
  border: none;
  box-shadow: 0 2px 8px rgba(0,0,0,0.4);
}

/* Hue slider has rainbow gradient */
.hue-range {
  background: linear-gradient(to right,
    hsl(0, 100%, 50%),
    hsl(60, 100%, 50%),
    hsl(120, 100%, 50%),
    hsl(180, 100%, 50%),
    hsl(240, 100%, 50%),
    hsl(300, 100%, 50%),
    hsl(360, 100%, 50%)
  ) !important;
}

/* Demo Buttons */
.demo-actions {
  display: flex;
  gap: 10px;
}

.demo-btn {
  padding: 10px 20px;
  border-radius: 8px;
  border: 1px solid var(--border-accent);
  background: transparent;
  color: var(--text-primary);
  font-family: var(--font);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
}

.demo-btn:hover {
  background: rgba(255,255,255,0.06);
  border-color: rgba(255,255,255,0.2);
}

.demo-btn:active {
  transform: scale(0.97);
}

/* ── Score Scale Table ─────────────────────────────────────────────────────── */
.scale-table-wrap {
  margin-top: 24px;
  overflow-x: auto;
}

.scale-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.scale-table thead th {
  text-align: left;
  padding: 12px 16px;
  color: var(--text-muted);
  font-weight: 600;
  font-size: 11px;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  border-bottom: 1px solid var(--border);
}

.scale-table tbody td {
  padding: 14px 16px;
  border-bottom: 1px solid rgba(255,255,255,0.04);
  color: var(--text-secondary);
}

.scale-range {
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  font-size: 13px;
}

.scale-range.elite { color: #34d399; }
.scale-range.excellent { color: #fbbf24; }
.scale-range.good { color: #fb923c; }
.scale-range.moderate { color: #ef4444; }
.scale-range.poor { color: #a16207; }
.scale-range.bad { color: #666; }

/* ── Footer ────────────────────────────────────────────────────────────────── */
#score-footer {
  padding: 40px 0 20px;
  text-align: center;
  font-size: 12px;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
  margin-top: 20px;
}

#score-footer a {
  color: var(--text-secondary);
  text-decoration: underline;
  text-decoration-color: rgba(255,255,255,0.15);
  text-underline-offset: 3px;
  transition: color var(--transition);
}

#score-footer a:hover {
  color: #fff;
}

/* ── Animations ────────────────────────────────────────────────────────────── */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Staggered animations for sections */
.text-section {
  animation: fadeInUp 0.5s var(--ease) both;
}

#slider-comparison-section { animation-delay: 0.15s; }
#pipeline-section { animation-delay: 0.2s; }
#interactive-section { animation-delay: 0.25s; }
#scale-section { animation-delay: 0.3s; }

/* ── Responsive ────────────────────────────────────────────────────────────── */
@media (max-width: 640px) {
  #score-main {
    padding: 80px 20px 40px;
  }

  .hero-section h1 {
    font-size: 32px;
    letter-spacing: -1px;
  }

  .content-card {
    padding: 24px;
  }

  .interactive-title {
    font-size: 20px;
  }

  .demo-card {
    padding: 20px;
  }

  .demo-color-box {
    height: 90px;
  }

  .demo-score-value {
    font-size: 36px;
  }

  .demo-metrics {
    flex-direction: column;
  }

  .demo-metric {
    padding: 10px 16px;
  }

  .demo-slider-label {
    width: 65px;
    font-size: 12px;
  }

  .demo-slider-val {
    width: 38px;
    font-size: 12px;
  }

  .code-block {
    padding: 16px;
  }

  .code-block code {
    font-size: 11px;
  }

  .formula-text {
    font-size: 12px;
  }

  body::before, body::after {
    width: 80px;
  }
}

@media (max-width: 380px) {
  .hero-section h1 {
    font-size: 26px;
  }

  .demo-colors {
    flex-direction: column;
    gap: 8px;
  }

  .demo-color-box {
    height: 70px;
  }
}