:root {
  --primary: #1a1a2e;
  --primary-light: #16213e;
  --accent: #e94560;
  --success: #2ecc71;
  --warning: #f39c12;
  --danger: #e74c3c;
  --info: #3498db;
  --bg: #f8f9fa;
  --card-bg: #ffffff;
  --text: #2c3e50;
  --text-muted: #6c757d;
  --border: #dee2e6;
  --radius: 8px;
  --shadow: 0 2px 8px rgba(0,0,0,0.08);
}

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

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

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

/* Nav */
.nav {
  background: var(--primary);
  padding: 0 2rem;
  display: flex;
  align-items: center;
  gap: 0;
  box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}
.nav-brand {
  color: #fff;
  font-size: 1.1rem;
  font-weight: 700;
  padding: 1rem 1.5rem 1rem 0;
  border-right: 1px solid rgba(255,255,255,0.15);
  margin-right: 0.5rem;
}
.nav-link {
  color: rgba(255,255,255,0.75);
  padding: 1rem 0.85rem;
  font-size: 0.9rem;
  transition: color 0.2s, background 0.2s;
  display: inline-block;
}
.nav-link:hover { color: #fff; text-decoration: none; }
.nav-link.active { color: #fff; border-bottom: 2px solid var(--accent); }

/* Container */
.container {
  max-width: 1100px;
  margin: 2rem auto;
  padding: 0 1rem;
}

/* Page header */
.page-header {
  margin-bottom: 1.5rem;
}
.page-header h2 {
  font-size: 1.6rem;
  color: var(--primary);
}
.page-header p {
  color: var(--text-muted);
  margin-top: 0.25rem;
}

/* Stat cards */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}
.stat-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  box-shadow: var(--shadow);
  border-left: 4px solid var(--primary);
}
.stat-card.success { border-left-color: var(--success); }
.stat-card.warning { border-left-color: var(--warning); }
.stat-card.danger { border-left-color: var(--danger); }
.stat-card .stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary);
  line-height: 1;
}
.stat-card .stat-label {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 0.4rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

/* Card */
.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}
.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}
.card-header h3 {
  font-size: 1.1rem;
  color: var(--primary);
}

/* Tables */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}
.data-table th {
  background: #f1f3f5;
  padding: 0.65rem 0.85rem;
  text-align: left;
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  border-bottom: 2px solid var(--border);
}
.data-table td {
  padding: 0.7rem 0.85rem;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: #fafbfc; }
.table-responsive { overflow-x: auto; }

/* Badges */
.badge {
  display: inline-block;
  padding: 0.2em 0.6em;
  border-radius: 99px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.badge-pendiente { background: #fff3cd; color: #856404; }
.badge-en_inspeccion { background: #cfe2ff; color: #084298; }
.badge-aprobada, .badge-aprobado { background: #d1e7dd; color: #0a3622; }
.badge-rechazada, .badge-rechazado { background: #f8d7da; color: #58151c; }
.badge-parcial, .badge-condicional { background: #fff3cd; color: #664d03; }
.badge-recibida { background: #d1e7dd; color: #0a3622; }
.badge-dañado { background: #f8d7da; color: #58151c; }
.badge-active { background: #d1e7dd; color: #0a3622; }
.badge-inactive { background: #e2e3e5; color: #41464b; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1.1rem;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  transition: opacity 0.2s, transform 0.1s;
  text-decoration: none;
}
.btn:hover { opacity: 0.87; text-decoration: none; }
.btn:active { transform: scale(0.98); }
.btn-primary { background: var(--accent); color: #fff; }
.btn-secondary { background: #6c757d; color: #fff; }
.btn-success { background: var(--success); color: #fff; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-outline { background: transparent; color: var(--primary); border: 1px solid var(--primary); }
.btn-sm { padding: 0.3rem 0.7rem; font-size: 0.8rem; }

/* Forms */
.form-section { margin-bottom: 2rem; }
.form-section h3 { font-size: 1rem; color: var(--primary); margin-bottom: 1rem; border-bottom: 1px solid var(--border); padding-bottom: 0.5rem; }
.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1rem; }
.form-group { display: flex; flex-direction: column; gap: 0.3rem; margin-bottom: 1rem; }
.form-group label { font-size: 0.85rem; font-weight: 600; color: var(--text); }
.form-control {
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.9rem;
  width: 100%;
  background: #fff;
  transition: border-color 0.2s;
}
.form-control:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(233,69,96,0.12); }
textarea.form-control { resize: vertical; min-height: 80px; }

/* Item rows in form */
.items-list { display: flex; flex-direction: column; gap: 0.75rem; }
.item-row {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr auto;
  gap: 0.5rem;
  align-items: end;
  background: #f8f9fa;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.75rem;
}
.item-row .form-group { margin-bottom: 0; }
.btn-remove { background: none; border: none; color: var(--danger); cursor: pointer; font-size: 1.1rem; padding: 0.25rem; }

/* Alerts */
.alert {
  padding: 0.85rem 1.1rem;
  border-radius: var(--radius);
  margin-bottom: 1rem;
  font-size: 0.9rem;
}
.alert-danger { background: #f8d7da; color: #58151c; border: 1px solid #f5c2c7; }
.alert-success { background: #d1e7dd; color: #0a3622; border: 1px solid #badbcc; }
.alert-info { background: #cfe2ff; color: #084298; border: 1px solid #b6d4fe; }

/* Actions bar */
.actions-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* Summary boxes */
.summary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}
.summary-box {
  background: #f8f9fa;
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  text-align: center;
  border: 1px solid var(--border);
}
.summary-box .sb-count { font-size: 1.5rem; font-weight: 700; }
.summary-box .sb-label { font-size: 0.75rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.03em; }
.summary-box.aprobado .sb-count { color: var(--success); }
.summary-box.rechazado .sb-count { color: var(--danger); }
.summary-box.pendiente .sb-count { color: var(--warning); }

/* Detail header */
.detail-header {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  box-shadow: var(--shadow);
  margin-bottom: 1.5rem;
}
.detail-header h2 { font-size: 1.4rem; color: var(--primary); margin-bottom: 0.75rem; }
.detail-meta { display: flex; flex-wrap: wrap; gap: 1.25rem; font-size: 0.88rem; }
.detail-meta .meta-item { display: flex; flex-direction: column; gap: 0.15rem; }
.detail-meta .meta-label { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--text-muted); }
.detail-meta .meta-value { font-weight: 600; }

/* Empty state */
.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-muted);
}
.empty-state p { margin-bottom: 1rem; }

/* Breadcrumb */
.breadcrumb {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb span { margin: 0 0.4rem; }

/* Footer */
.footer {
  text-align: center;
  padding: 1.5rem;
  color: var(--text-muted);
  font-size: 0.82rem;
  border-top: 1px solid var(--border);
  margin-top: 3rem;
}

/* Radio group */
.radio-group { display: flex; gap: 1.5rem; flex-wrap: wrap; }
.radio-option { display: flex; align-items: center; gap: 0.4rem; cursor: pointer; }
.radio-option input { cursor: pointer; }

@media (max-width: 600px) {
  .nav { padding: 0 0.75rem; overflow-x: auto; }
  .container { margin: 1rem auto; }
  .item-row { grid-template-columns: 1fr; }
  .stat-grid { grid-template-columns: 1fr 1fr; }
  .detail-meta { flex-direction: column; gap: 0.75rem; }
}