/* Proveno — Dark Premium Design System */
:root {
  --bg: #0a0a0a;
  --bg-card: #111111;
  --bg-card-hover: #181818;
  --bg-input: #1a1a1a;
  --border: #222222;
  --border-hover: #333333;
  --text: #f5f5f5;
  --text-muted: #888888;
  --text-dim: #555555;
  --accent: #c9a94e;
  --accent-hover: #dbb95e;
  --success: #22c55e;
  --error: #ef4444;
  --warning: #f59e0b;
  --radius: 12px;
  --radius-sm: 8px;
}

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

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

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

/* Layout */
.container { max-width: 1080px; margin: 0 auto; padding: 0 24px; }
.page { min-height: 100vh; display: flex; flex-direction: column; }
.page-content { flex: 1; padding: 40px 0; }

/* Navigation */
.nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 0; border-bottom: 1px solid var(--border);
}
.nav-brand {
  font-size: 20px; font-weight: 700; color: var(--text);
  letter-spacing: 0.5px;
}
.nav-brand span { color: var(--accent); }
.nav-links { display: flex; align-items: center; gap: 24px; }
.nav-links a {
  color: var(--text-muted); font-size: 14px; font-weight: 500;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--text); }
.nav-links a.active { color: var(--accent); }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 24px; border-radius: var(--radius-sm);
  font-size: 14px; font-weight: 600; cursor: pointer;
  border: none; transition: all 0.2s; gap: 8px;
  text-decoration: none;
}
.btn-primary {
  background: var(--accent); color: #0a0a0a;
}
.btn-primary:hover { background: var(--accent-hover); color: #0a0a0a; }
.btn-secondary {
  background: transparent; color: var(--text);
  border: 1px solid var(--border);
}
.btn-secondary:hover { border-color: var(--border-hover); background: var(--bg-card); }
.btn-sm { padding: 8px 16px; font-size: 13px; }
.btn-lg { padding: 16px 32px; font-size: 16px; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-block { width: 100%; }

/* Cards */
.card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px;
  transition: border-color 0.2s;
}
.card:hover { border-color: var(--border-hover); }
.card-header {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 16px;
}
.card-title { font-size: 16px; font-weight: 600; }

/* Forms */
.form-group { margin-bottom: 20px; }
.form-label {
  display: block; font-size: 13px; font-weight: 500;
  color: var(--text-muted); margin-bottom: 6px;
}
.form-input {
  width: 100%; padding: 12px 16px; border-radius: var(--radius-sm);
  border: 1px solid var(--border); background: var(--bg-input);
  color: var(--text); font-size: 15px; outline: none;
  transition: border-color 0.2s;
}
.form-input:focus { border-color: var(--accent); }
.form-input::placeholder { color: var(--text-dim); }

/* Badges */
.badge {
  display: inline-flex; align-items: center; padding: 4px 10px;
  border-radius: 20px; font-size: 12px; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.5px;
}
.badge-minted { background: rgba(201,169,78,0.15); color: var(--accent); }
.badge-owned { background: rgba(34,197,94,0.15); color: var(--success); }
.badge-listed { background: rgba(245,158,11,0.15); color: var(--warning); }
.badge-active { background: rgba(34,197,94,0.15); color: var(--success); }
.badge-sold { background: rgba(136,136,136,0.15); color: var(--text-muted); }

/* Table */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th {
  text-align: left; padding: 12px 16px; font-size: 12px;
  font-weight: 600; color: var(--text-muted); text-transform: uppercase;
  letter-spacing: 0.5px; border-bottom: 1px solid var(--border);
}
td {
  padding: 14px 16px; font-size: 14px; border-bottom: 1px solid var(--border);
}
tr:hover td { background: var(--bg-card-hover); }

/* Hero section */
.hero {
  text-align: center; padding: 100px 0 60px;
}
.hero h1 {
  font-size: 56px; font-weight: 800; line-height: 1.1;
  letter-spacing: -1px; margin-bottom: 20px;
}
.hero h1 span { color: var(--accent); }
.hero p {
  font-size: 18px; color: var(--text-muted); max-width: 540px;
  margin: 0 auto 40px; line-height: 1.7;
}

/* Stats grid */
.stats-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px; margin: 32px 0;
}
.stat-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px; text-align: center;
}
.stat-number { font-size: 32px; font-weight: 700; color: var(--accent); }
.stat-label { font-size: 13px; color: var(--text-muted); margin-top: 4px; }

/* Feature grid */
.features {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px; margin: 60px 0;
}
.feature-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 32px;
}
.feature-icon { font-size: 28px; margin-bottom: 16px; }
.feature-card h3 { font-size: 16px; font-weight: 600; margin-bottom: 8px; }
.feature-card p { font-size: 14px; color: var(--text-muted); line-height: 1.6; }

/* Certificate card */
.cert-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px;
  display: flex; flex-direction: column; gap: 12px;
}
.cert-serial {
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 18px; font-weight: 700; color: var(--accent);
}
.cert-meta {
  display: flex; gap: 16px; font-size: 13px; color: var(--text-muted);
}
.cert-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
}

/* Verify result */
.verify-result {
  margin-top: 24px; padding: 24px; border-radius: var(--radius);
  border: 1px solid var(--border);
}
.verify-success { border-color: var(--success); background: rgba(34,197,94,0.05); }
.verify-fail { border-color: var(--error); background: rgba(239,68,68,0.05); }

/* Auth center */
.auth-container {
  max-width: 400px; margin: 80px auto;
}

/* Empty state */
.empty-state {
  text-align: center; padding: 60px 0; color: var(--text-muted);
}
.empty-state .icon { font-size: 48px; margin-bottom: 16px; opacity: 0.5; }
.empty-state h3 { font-size: 18px; color: var(--text); margin-bottom: 8px; }
.empty-state p { font-size: 14px; }

/* Alert */
.alert {
  padding: 14px 18px; border-radius: var(--radius-sm);
  font-size: 14px; margin-bottom: 20px;
}
.alert-success { background: rgba(34,197,94,0.1); color: var(--success); border: 1px solid rgba(34,197,94,0.2); }
.alert-error { background: rgba(239,68,68,0.1); color: var(--error); border: 1px solid rgba(239,68,68,0.2); }
.alert-info { background: rgba(201,169,78,0.1); color: var(--accent); border: 1px solid rgba(201,169,78,0.2); }

/* Loading spinner */
.spinner {
  display: inline-block; width: 18px; height: 18px;
  border: 2px solid var(--border); border-top-color: var(--accent);
  border-radius: 50%; animation: spin 0.6s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

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

/* Section titles */
.section-header {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 24px;
}
.section-title { font-size: 24px; font-weight: 700; }
.section-subtitle { font-size: 14px; color: var(--text-muted); margin-top: 4px; }

/* Listing card */
.listing-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px;
  display: flex; justify-content: space-between; align-items: center;
}
.listing-price { font-size: 20px; font-weight: 700; color: var(--accent); }
.listing-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
}

/* Admin Dashboard */
.admin-actions-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 20px;
}
.admin-action-card { display: flex; flex-direction: column; }
.admin-action-card .card-header { margin-bottom: 0; }

/* Admin Search & Filters */
.admin-filters { padding: 16px 0 0; }
.admin-search-row {
  display: flex; gap: 12px; align-items: center; flex-wrap: wrap;
}
.admin-search-input { flex: 1; min-width: 200px; }
.admin-filter-tabs { display: flex; gap: 4px; }
.filter-tab {
  padding: 6px 14px; border-radius: 20px; font-size: 13px;
  font-weight: 500; cursor: pointer; border: 1px solid var(--border);
  background: transparent; color: var(--text-muted); transition: all 0.2s;
}
.filter-tab:hover { border-color: var(--border-hover); color: var(--text); }
.filter-tab.active { background: var(--accent); color: #0a0a0a; border-color: var(--accent); }

/* Cert serial in table */
.cert-serial-sm { color: var(--accent); font-weight: 600; font-size: 13px; }

/* Stat card color accents */
.stat-minted .stat-number { color: var(--accent); }
.stat-owned .stat-number { color: var(--success); }
.stat-listed .stat-number { color: var(--warning); }

/* Pagination */
.admin-pagination {
  display: flex; justify-content: center; gap: 6px; padding: 16px 0;
}
.pag-btn {
  width: 36px; height: 36px; border-radius: 8px; border: 1px solid var(--border);
  background: transparent; color: var(--text-muted); font-size: 14px;
  cursor: pointer; transition: all 0.2s; display: flex; align-items: center;
  justify-content: center;
}
.pag-btn:hover { border-color: var(--border-hover); color: var(--text); }
.pag-btn.pag-active { background: var(--accent); color: #0a0a0a; border-color: var(--accent); }

/* Nav admin link */
.nav-admin { color: var(--accent) !important; }

/* Responsive */
@media (max-width: 640px) {
  .hero h1 { font-size: 36px; }
  .hero { padding: 60px 0 40px; }
  .nav-links { gap: 16px; }
  .nav-links a { font-size: 13px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .admin-actions-grid { grid-template-columns: 1fr; }
  .admin-search-row { flex-direction: column; }
  .admin-filter-tabs { width: 100%; justify-content: space-between; }
}

/* Utility */
.hidden { display: none !important; }
.mt-2 { margin-top: 8px; }
.mt-4 { margin-top: 16px; }
.mt-6 { margin-top: 24px; }
.mb-4 { margin-bottom: 16px; }
.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.text-sm { font-size: 13px; }
.mono { font-family: 'SF Mono', 'Fira Code', monospace; }
.flex { display: flex; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }