:root {
  --navy: #0f174d;
  --gold: #c9a227;
  --gold-light: #f0d080;
  --bg: #f4f6fb;
  --white: #fff;
  --text: #1a1a2e;
  --muted: #6b7280;
  --border: #e2e8f0;
  --success: #16a34a;
  --danger: #dc2626;
  --radius: 12px;
  --shadow: 0 4px 24px rgba(15,23,77,0.10);
}

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

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

/* NAVBAR */
.navbar {
  background: var(--navy);
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.2);
  position: sticky; top: 0; z-index: 100;
}
.nav-brand {
  display: flex; align-items: center; gap: 12px;
  color: var(--white); font-weight: 700; font-size: 1rem;
}
.nav-logo {
  width: 36px; height: 36px; border-radius: 50%;
  background: linear-gradient(135deg, var(--gold), var(--gold-light));
  display: flex; align-items: center; justify-content: center;
  font-weight: 900; color: var(--navy); font-size: 1.1rem;
}
.nav-links { display: flex; gap: 4px; }
.nav-links a {
  color: rgba(255,255,255,0.75); text-decoration: none;
  padding: 8px 16px; border-radius: 8px; font-size: 0.9rem;
  transition: all .2s;
}
.nav-links a:hover, .nav-links a.active {
  background: rgba(255,255,255,0.12); color: var(--white);
}
.nav-links a.active { color: var(--gold-light); }

/* CONTAINER */
.container { max-width: 900px; margin: 0 auto; padding: 2rem 1rem 4rem; }

/* HERO */
.hero { text-align: center; margin-bottom: 2rem; }
.hero h1 {
  font-size: 2rem; font-weight: 800; color: var(--navy);
  margin-bottom: .5rem;
}
.hero p { color: var(--muted); font-size: 1rem; }

/* CARD */
.card {
  background: var(--white); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 2rem;
  margin-bottom: 1.5rem;
}

/* FORM */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-bottom: 1.5rem; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group.full { grid-column: 1 / -1; }
.form-group label { font-size: .85rem; font-weight: 600; color: var(--navy); }
.form-group input {
  padding: 10px 14px; border: 2px solid var(--border);
  border-radius: 8px; font-size: .95rem; transition: border .2s;
  outline: none;
}
.form-group input:focus { border-color: var(--navy); }

/* BUTTONS */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 24px; border-radius: 8px; font-size: .95rem;
  font-weight: 600; cursor: pointer; border: none; text-decoration: none;
  transition: all .2s;
}
.btn-primary {
  background: linear-gradient(135deg, var(--navy), #1e3a8a);
  color: var(--white);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 4px 16px rgba(15,23,77,0.3); }
.btn-outline {
  background: transparent; color: var(--navy);
  border: 2px solid var(--navy);
}
.btn-outline:hover { background: var(--navy); color: var(--white); }
.btn-sm { padding: 6px 14px; font-size: .82rem; }
.btn-danger { background: var(--danger); color: var(--white); }
.btn-success { background: var(--success); color: var(--white); }

/* RESULT */
.hidden { display: none !important; }
.result-section { animation: fadeIn .4s ease; }
@keyframes fadeIn { from { opacity:0; transform:translateY(16px); } to { opacity:1; transform:none; } }

.success-card { text-align: center; border-top: 4px solid var(--gold); }
.success-icon { font-size: 3rem; margin-bottom: .5rem; }
.success-card h2 { color: var(--navy); font-size: 1.5rem; margin-bottom: .5rem; }
.reg-number {
  display: inline-block; background: var(--bg); border: 2px dashed var(--gold);
  padding: 8px 20px; border-radius: 8px; font-weight: 700;
  color: var(--navy); font-size: 1.1rem; margin: .5rem 0 1rem;
}
.result-actions { display: flex; gap: 1rem; justify-content: center; margin-bottom: 1.5rem; flex-wrap: wrap; }
.cert-preview img { max-width: 100%; border-radius: 8px; box-shadow: var(--shadow); }

/* VERIFY */
.verify-card .input-row { display: flex; gap: .75rem; }
.verify-card .input-row input { flex: 1; }

.valid-card { border-top: 4px solid var(--success); text-align: center; }
.invalid-card { border-top: 4px solid var(--danger); text-align: center; }
.status-icon { font-size: 3rem; margin-bottom: .5rem; }
.badge {
  display: inline-block; padding: 4px 14px; border-radius: 20px;
  font-size: .85rem; font-weight: 700; margin: .5rem 0 1rem;
}
.badge.valid { background: #dcfce7; color: var(--success); }
.badge.invalid { background: #fee2e2; color: var(--danger); }

.info-table { width: 100%; max-width: 500px; margin: 0 auto 1.5rem; text-align: left; border-collapse: collapse; }
.info-table td { padding: 8px 12px; border-bottom: 1px solid var(--border); font-size: .9rem; }
.info-table td:first-child { color: var(--muted); width: 120px; }

/* ADMIN TABLE */
.table-toolbar {
  display: flex; align-items: center; gap: 1rem;
  margin-bottom: 1rem; flex-wrap: wrap;
}
.table-toolbar input {
  flex: 1; min-width: 200px; padding: 9px 14px;
  border: 2px solid var(--border); border-radius: 8px;
  font-size: .9rem; outline: none;
}
.table-toolbar input:focus { border-color: var(--navy); }
.total-count { color: var(--muted); font-size: .85rem; white-space: nowrap; }

.table-wrap { overflow-x: auto; }
.data-table { width: 100%; border-collapse: collapse; font-size: .88rem; }
.data-table th {
  background: var(--navy); color: var(--white);
  padding: 10px 12px; text-align: left; font-weight: 600;
}
.data-table th:first-child { border-radius: 8px 0 0 0; }
.data-table th:last-child { border-radius: 0 8px 0 0; }
.data-table td { padding: 10px 12px; border-bottom: 1px solid var(--border); vertical-align: middle; }
.data-table tr:hover td { background: #f8faff; }
.data-table .loading { text-align: center; color: var(--muted); padding: 2rem; }

.status-badge {
  padding: 3px 10px; border-radius: 12px; font-size: .78rem; font-weight: 700;
}
.status-badge.valid { background: #dcfce7; color: var(--success); }
.status-badge.invalid { background: #fee2e2; color: var(--danger); }

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

/* PAGINATION */
.pagination { display: flex; gap: 6px; justify-content: center; margin-top: 1.5rem; flex-wrap: wrap; }
.pagination button {
  padding: 6px 14px; border: 2px solid var(--border); background: var(--white);
  border-radius: 6px; cursor: pointer; font-size: .85rem; transition: all .2s;
}
.pagination button.active { background: var(--navy); color: var(--white); border-color: var(--navy); }
.pagination button:hover:not(.active) { border-color: var(--navy); color: var(--navy); }

@media (max-width: 600px) {
  .form-grid { grid-template-columns: 1fr; }
  .form-group.full { grid-column: 1; }
  .navbar { padding: 0 1rem; }
  .nav-brand span { display: none; }
}