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

:root {
  --bg: #0a0f1a;
  --surface: #111827;
  --surface-2: #1a2235;
  --surface-3: #243049;
  --border: #2a3a55;
  --text: #e2e8f0;
  --text-dim: #8899b3;
  --text-muted: #5a6e8a;
  --accent: #38bdf8;
  --accent-glow: rgba(56, 189, 248, 0.15);
  --green: #22c55e;
  --green-glow: rgba(34, 197, 94, 0.15);
  --yellow: #eab308;
  --orange: #f97316;
  --red: #ef4444;
  --radius: 12px;
  --radius-sm: 8px;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ─── Header ──────────────────────────────────────────────────── */
.header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-icon { font-size: 28px; }

.logo h1 {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--accent), #a78bfa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.subtitle {
  font-size: 12px;
  color: var(--text-dim);
  font-weight: 500;
}

.header-stats { display: flex; gap: 8px; }

.stat-pill {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 6px 14px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.stat-label { font-size: 11px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.05em; }
.stat-value { font-size: 14px; font-weight: 700; color: var(--accent); }

/* ─── Hero ────────────────────────────────────────────────────── */
.hero {
  padding: 48px 0 32px;
  text-align: center;
}

.hero h2 {
  font-size: 36px;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.hero p {
  font-size: 16px;
  color: var(--text-dim);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ─── Configurator Grid ──────────────────────────────────────── */
.configurator-grid {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 32px;
  padding-bottom: 80px;
}

/* ─── Components Panel ────────────────────────────────────────── */
.category {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
}

.category-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.category-header h3 {
  font-size: 18px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
}

.cat-icon { font-size: 20px; }

.category-total {
  font-size: 16px;
  font-weight: 700;
  color: var(--accent);
}

.component-group {
  margin-bottom: 16px;
}

.component-group:last-child { margin-bottom: 0; }

.group-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-dim);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

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

.option {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-rows: auto auto;
  gap: 0 16px;
  padding: 12px 16px;
  background: var(--surface-2);
  border: 2px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s ease;
  text-align: left;
  color: var(--text);
  font-family: inherit;
  width: 100%;
}

.option:hover {
  border-color: var(--border);
  background: var(--surface-3);
}

.option.selected {
  border-color: var(--accent);
  background: var(--accent-glow);
}

.opt-name {
  font-weight: 600;
  font-size: 14px;
  grid-column: 1;
  grid-row: 1;
}

.opt-detail {
  font-size: 12px;
  color: var(--text-dim);
  grid-column: 1;
  grid-row: 2;
}

.opt-price {
  font-weight: 700;
  font-size: 15px;
  color: var(--green);
  grid-column: 2;
  grid-row: 1 / 3;
  align-self: center;
}

.opt-specs {
  grid-column: 1 / 3;
  grid-row: 3;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 6px;
}

.spec {
  font-size: 11px;
  background: var(--surface-3);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 2px 8px;
  color: var(--text-dim);
  white-space: nowrap;
}

.option.selected .spec {
  background: rgba(56, 189, 248, 0.1);
  border-color: rgba(56, 189, 248, 0.3);
  color: var(--accent);
}

/* ─── Summary Panel ───────────────────────────────────────────── */
.summary-panel {
  position: relative;
}

.summary-sticky {
  position: sticky;
  top: 80px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.summary-panel h3 {
  font-size: 20px;
  font-weight: 800;
}

/* Build Tier Badge */
.build-tier { text-align: center; }

.tier-badge {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.tier-badge.budget { background: var(--green-glow); color: var(--green); border: 1px solid rgba(34,197,94,0.3); }
.tier-badge.recommended { background: var(--accent-glow); color: var(--accent); border: 1px solid rgba(56,189,248,0.3); }
.tier-badge.premium { background: rgba(168,85,247,0.15); color: #a855f7; border: 1px solid rgba(168,85,247,0.3); }

/* Cost Breakdown */
.cost-breakdown {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
}

.cost-row {
  display: flex;
  justify-content: space-between;
  padding: 6px 0;
  font-size: 14px;
}

.cost-row span:first-child { color: var(--text-dim); }
.cost-row span:last-child { font-weight: 600; }

.cost-divider {
  height: 1px;
  background: var(--border);
  margin: 8px 0;
}

.total-row span:first-child { color: var(--text); font-weight: 700; }
.total-row span:last-child { color: var(--green); font-weight: 800; font-size: 18px; }

/* Performance Card */
.perf-card, .comparison-card, .tips-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
}

.perf-card h4, .comparison-card h4, .tips-card h4 {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-dim);
}

.perf-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.perf-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.perf-label { font-size: 11px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.05em; }
.perf-value { font-size: 16px; font-weight: 700; color: var(--text); }

/* Comparison */
.savings {
  text-align: center;
  margin-bottom: 12px;
}

.savings-label { font-size: 12px; color: var(--text-dim); display: block; }
.savings-value { font-size: 28px; font-weight: 800; color: var(--green); }

.comparison-bar {
  display: flex;
  height: 32px;
  border-radius: 6px;
  overflow: hidden;
  background: var(--surface-3);
  font-size: 11px;
  font-weight: 600;
}

.bar-yours {
  background: linear-gradient(90deg, var(--green), #4ade80);
  color: #000;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: width 0.4s ease;
  min-width: 60px;
  white-space: nowrap;
  padding: 0 8px;
}

.bar-zerotow {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
}

/* Actions */
.actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.btn-primary, .btn-secondary {
  display: block;
  width: 100%;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  font-family: inherit;
  text-align: center;
  transition: all 0.15s ease;
}

.btn-primary {
  background: var(--accent);
  color: #000;
}

.btn-primary:hover { background: #5cc9f5; text-decoration: none; }

.btn-secondary {
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text);
}

.btn-secondary:hover { border-color: var(--accent); background: var(--surface-3); text-decoration: none; }

/* Shopping List */
.shopping-list {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
}

.shopping-list h4 {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 12px;
}

.shop-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
}

.shop-item:last-child { border-bottom: none; }

.shop-item-name { font-weight: 500; }
.shop-item-source { color: var(--text-muted); font-size: 12px; }
.shop-item-price { font-weight: 600; color: var(--green); white-space: nowrap; }

.btn-copy {
  width: 100%;
  padding: 8px;
  margin-top: 12px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  cursor: pointer;
  font-size: 13px;
  font-family: inherit;
}

.btn-copy:hover { border-color: var(--accent); }

/* Tips */
.tips-card ul {
  list-style: none;
  padding: 0;
}

.tips-card li {
  font-size: 13px;
  color: var(--text-dim);
  padding: 4px 0 4px 20px;
  position: relative;
}

.tips-card li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--accent);
}

/* ─── Footer ──────────────────────────────────────────────────── */
.footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 32px 0;
  text-align: center;
}

.footer p { font-size: 14px; color: var(--text-dim); margin-bottom: 8px; }
.disclaimer { font-size: 12px !important; color: var(--text-muted) !important; }

/* ─── Responsive ──────────────────────────────────────────────── */
@media (max-width: 900px) {
  .configurator-grid {
    grid-template-columns: 1fr;
  }

  .summary-sticky {
    position: static;
  }

  .header-stats { display: none; }

  .hero h2 { font-size: 28px; }
  .hero p { font-size: 14px; }

  .category { padding: 16px; }
}

@media (max-width: 500px) {
  .container { padding: 0 16px; }
  .hero { padding: 32px 0 20px; }
  .hero h2 { font-size: 24px; }
}

/* ─── Animations ──────────────────────────────────────────────── */
.option { transition: all 0.15s ease, border-color 0.2s ease; }
.cost-row span:last-child { transition: color 0.2s ease; }
.bar-yours { transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1); }
.savings-value { transition: color 0.2s ease; }

/* ─── Print Stylesheet ────────────────────────────────────────── */
@media print {
  :root {
    --bg: #fff;
    --surface: #fff;
    --surface-2: #f5f5f5;
    --surface-3: #eee;
    --border: #ddd;
    --text: #111;
    --text-dim: #555;
    --text-muted: #888;
    --accent: #0066cc;
  }

  body { background: #fff; color: #111; font-size: 11px; }
  .header { background: #fff; border-bottom: 2px solid #111; }
  .header-inner { padding: 8px 0; }
  .logo-icon { filter: none; }
  .hero { padding: 12px 0; background: none; }
  .hero h2 { font-size: 20px; color: #111; }

  /* Hide interactive elements */
  .components-panel { display: none !important; }
  .actions .btn-secondary,
  .tips-card,
  .footer .disclaimer { display: none !important; }

  /* Show summary + shopping list */
  .configurator-grid { grid-template-columns: 1fr; }
  .summary-panel { max-width: 100%; }
  .summary-sticky { position: static; }

  /* Force shopping list visible */
  #shopping-list { display: block !important; }
  #btn-shopping-list { display: none !important; }
  .btn-copy { display: none !important; }

  /* Clean up cards */
  .cost-breakdown, .perf-card, .comparison-card, .shopping-list {
    border: 1px solid #ddd;
    page-break-inside: avoid;
  }

  .option, .category, .summary-panel {
    box-shadow: none !important;
  }

  /* Print header */
  .hero::after {
    content: "Build Sheet — Generated " attr(data-date);
    display: block;
    font-size: 11px;
    color: #888;
    margin-top: 4px;
  }

  a { color: #111; text-decoration: underline; }
  a[href]::after { content: " (" attr(href) ")"; font-size: 9px; color: #888; }
}