/* ============================================================
   TCG VAULT — design system
   Premium / dark / collector-luxe
   ============================================================ */

:root {
  --bg: #0a0b10;
  --surface: #14151c;
  --surface-2: #1c1d26;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(212, 175, 55, 0.35);
  --text: #f4f4f5;
  --text-muted: #9ca0ab;
  --text-dim: #6b7280;
  --gold: #d4af37;
  --gold-bright: #f4cf57;
  --gold-dim: #8a7128;
  --holo: linear-gradient(135deg, #d4af37 0%, #a78bfa 50%, #38bdf8 100%);

  --status-available: #10b981;
  --status-pending: #f59e0b;
  --status-sold: #6b7280;

  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 16px;

  --container: 1200px;
  --gap: 24px;

  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 32px rgba(212, 175, 55, 0.15);
}

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

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--gold);
  text-decoration: none;
  transition: color 0.15s ease;
}

a:hover {
  color: var(--gold-bright);
}

img {
  max-width: 100%;
  display: block;
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
}

/* ============================================================
   HEADER / NAV
   ============================================================ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(10, 11, 16, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.brand:hover {
  color: var(--text);
}

.brand-mark {
  width: 36px;
  height: 36px;
  display: block;
}

.brand-text {
  color: var(--text);
}

.brand-text .accent {
  color: var(--gold);
}

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

nav.primary a {
  color: var(--text-muted);
  font-weight: 500;
  font-size: 14px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  transition: all 0.15s ease;
}

nav.primary a:hover,
nav.primary a.active {
  color: var(--text);
  background: var(--surface);
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  color: var(--text);
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

/* ============================================================
   HERO
   ============================================================ */

.hero {
  padding: 56px 0 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(212, 175, 55, 0.08) 0%, transparent 60%);
  pointer-events: none;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 16px;
  padding: 6px 14px;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  background: rgba(212, 175, 55, 0.05);
}

.hero h1 {
  font-size: clamp(32px, 5vw, 56px);
  line-height: 1.05;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  position: relative;
}

.hero h1 .holo {
  background: var(--holo);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero p.lede {
  font-size: clamp(16px, 2vw, 18px);
  color: var(--text-muted);
  max-width: 620px;
  margin: 0 auto 28px;
  position: relative;
}

.hero-cta {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  position: relative;
}

/* ============================================================
   BUTTONS
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 24px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 0.15s ease;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--gold);
  color: #0a0b10;
  border-color: var(--gold);
}

.btn-primary:hover {
  background: var(--gold-bright);
  border-color: var(--gold-bright);
  color: #0a0b10;
  box-shadow: var(--shadow-glow);
}

.btn-secondary {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}

.btn-secondary:hover {
  background: var(--surface);
  border-color: var(--border-strong);
  color: var(--text);
}

/* ============================================================
   SECTIONS
   ============================================================ */

.section {
  padding: 40px 0;
}

.section-head {
  text-align: center;
  margin-bottom: 28px;
}

.section-head h2 {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 12px;
}

.section-head p {
  color: var(--text-muted);
  max-width: 560px;
  margin: 0 auto;
}

/* ============================================================
   FEATURE GRID (home page)
   ============================================================ */

.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gap);
}

.feature {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: all 0.2s ease;
  text-align: center;
}

.feature:hover {
  border-color: var(--border-strong);
  transform: translateY(-2px);
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: rgba(212, 175, 55, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gold);
  margin: 0 auto 14px;
}

.feature h3 {
  font-size: 17px;
  margin-bottom: 8px;
  font-weight: 600;
}

.feature p {
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.6;
}

/* ============================================================
   INVENTORY
   ============================================================ */

.inventory-toolbar {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 32px;
  align-items: center;
}

.search-input {
  flex: 1;
  min-width: 240px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-family: inherit;
  transition: border-color 0.15s ease;
}

.search-input:focus {
  outline: none;
  border-color: var(--gold-dim);
}

.search-input::placeholder {
  color: var(--text-dim);
}

.filter-group {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.filter-pill {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 10px 16px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
  font-family: inherit;
}

.filter-pill:hover {
  color: var(--text);
  border-color: var(--border-strong);
}

.filter-pill.active {
  background: var(--gold);
  color: #0a0b10;
  border-color: var(--gold);
}

.inventory-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gap);
}

.product-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all 0.2s ease;
  display: flex;
  flex-direction: column;
}

.product-card:hover {
  border-color: var(--border-strong);
  transform: translateY(-3px);
  box-shadow: var(--shadow-card);
}

.product-image {
  aspect-ratio: 1;
  background: #f4f4f1;
  position: relative;
  overflow: hidden;
  padding: 18px;
}

.product-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  transition: transform 0.3s ease;
}

.product-card:hover .product-image img {
  transform: scale(1.04);
}

.product-image-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #b8b8b3;
  font-size: 13px;
  background: #f4f4f1;
}

.status-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  padding: 5px 10px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  backdrop-filter: blur(8px);
}

.status-available {
  background: rgba(16, 185, 129, 0.95);
  color: #ffffff;
  border: 1px solid rgba(16, 185, 129, 0.5);
}

.status-pending {
  background: rgba(245, 158, 11, 0.95);
  color: #ffffff;
  border: 1px solid rgba(245, 158, 11, 0.5);
}

.status-sold {
  background: rgba(55, 65, 81, 0.95);
  color: #ffffff;
  border: 1px solid rgba(55, 65, 81, 0.5);
}

.product-info {
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}

.product-category {
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gold);
  font-weight: 600;
}

.product-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  line-height: 1.3;
}

.product-description {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.5;
  flex: 1;
}

.product-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 12px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}

.product-price {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.01em;
}

.product-price .currency {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  margin-right: 2px;
}

.product-card.is-sold {
  opacity: 0.55;
}

.product-card.is-sold .product-image img {
  filter: grayscale(0.8);
}

.empty-state {
  text-align: center;
  padding: 64px 24px;
  color: var(--text-muted);
}

.empty-state h3 {
  color: var(--text);
  margin-bottom: 8px;
}

/* ============================================================
   FAQ
   ============================================================ */

.faq-search-wrap {
  max-width: 800px;
  margin: 0 auto 24px;
}

.faq-search-wrap .search-input {
  width: 100%;
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-color 0.15s ease;
}

.faq-item:hover {
  border-color: var(--border-strong);
}

.faq-question {
  padding: 20px 24px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  font-weight: 500;
  user-select: none;
  font-size: 16px;
}

.faq-question:hover {
  color: var(--gold);
}

.faq-toggle {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--surface-2);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all 0.2s ease;
  color: var(--text-muted);
}

.faq-item.open .faq-toggle {
  background: var(--gold);
  color: #0a0b10;
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-item.open .faq-answer {
  max-height: 600px;
}

.faq-answer-inner {
  padding: 0 24px 22px;
  color: var(--text-muted);
  line-height: 1.7;
}

.faq-category {
  display: none;
}

/* ============================================================
   CONTACT
   ============================================================ */

.contact-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--gap);
  max-width: 900px;
  margin: 0 auto;
}

.contact-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  text-align: center;
}

.contact-card h3 {
  font-size: 18px;
  margin: 16px 0 8px;
  font-weight: 600;
}

.contact-card p {
  color: var(--text-muted);
  font-size: 14px;
  margin-bottom: 16px;
}

.contact-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius);
  background: rgba(212, 175, 55, 0.1);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--gold);
  margin-bottom: 8px;
}

/* ============================================================
   FOOTER
   ============================================================ */

.site-footer {
  margin-top: auto;
  padding: 32px 0;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-dim);
  font-size: 13px;
}

.site-footer a {
  color: var(--text-muted);
}

/* ============================================================
   LOADING + STATES
   ============================================================ */

.loading {
  text-align: center;
  padding: 64px 24px;
  color: var(--text-muted);
}

.spinner {
  display: inline-block;
  width: 32px;
  height: 32px;
  border: 3px solid var(--border);
  border-top-color: var(--gold);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-bottom: 16px;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ============================================================
   RESPONSIVE
   ============================================================ */

@media (max-width: 900px) {
  .features,
  .inventory-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .contact-grid {
    grid-template-columns: 1fr;
  }
  .hero {
    padding: 40px 0 32px;
  }
}

@media (max-width: 640px) {
  .nav-toggle {
    display: inline-flex;
  }
  nav.primary {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 12px 24px 20px;
    gap: 4px;
  }
  nav.primary.open {
    display: flex;
  }
  nav.primary a {
    padding: 12px 14px;
    width: 100%;
  }
  .features,
  .inventory-grid {
    grid-template-columns: 1fr;
  }
  .section {
    padding: 32px 0;
  }
  .inventory-toolbar {
    flex-direction: column;
    align-items: stretch;
  }
}