:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --accent: #0ea5e9;
  --danger: #ef4444;
  --success: #22c55e;
  --surface: #ffffff;
  --bg: #f8fafc;
  --border: #e2e8f0;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 4px 12px rgba(0,0,0,0.08);
  --text: #1e293b;
  --text-light: #64748b;
}
* { box-sizing: border-box; }
body {
  font-family: 'Inter', -apple-system, Segoe UI, sans-serif;
  background: var(--bg);
  color: var(--text);
  margin: 0;
}

/* ============================================================
   NAVBAR (usada en cotizacion.php y admin/usuarios.php)
   ============================================================ */
.app-navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0.6rem 1.25rem;
  position: sticky;
  top: 0;
  z-index: 200;
}
.app-navbar .navbar-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  min-width: 0;
}
.app-navbar .navbar-brand img {
  height: 34px;
  width: 34px;
  border-radius: 8px;
  object-fit: cover;
  flex-shrink: 0;
}
.app-navbar .navbar-brand span {
  font-weight: 700;
  font-size: 1rem;
  color: var(--text);
  white-space: nowrap;
}
.app-navbar .navbar-links {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}
.app-navbar .navbar-links a {
  color: var(--text-light);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.4rem 0.7rem;
  border-radius: var(--radius-sm);
  transition: background 0.15s, color 0.15s;
}
.app-navbar .navbar-links a:hover {
  background: var(--bg);
  color: var(--primary);
}
.app-navbar .navbar-links a.active {
  color: var(--primary);
}
.navbar-user {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding-left: 0.75rem;
  border-left: 1px solid var(--border);
}
.navbar-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.8rem;
  flex-shrink: 0;
}
.navbar-user-info {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}
.navbar-user-info strong {
  font-size: 0.82rem;
}
.navbar-role-badge {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  color: var(--primary);
  background: #eff6ff;
  border-radius: 999px;
  padding: 0.1rem 0.5rem;
  width: fit-content;
}
.navbar-role-badge.rol-admin {
  color: #b45309;
  background: #fffbeb;
}

/* ============================================================
   LOGIN (pantalla dividida)
   ============================================================ */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  padding: 1.5rem;
}
.login-shell {
  width: 100%;
  max-width: 900px;
  background: var(--surface);
  border-radius: 16px;
  box-shadow: var(--shadow);
  display: grid;
  grid-template-columns: 1fr 1fr;
  overflow: hidden;
}
.login-panel-brand {
  background: linear-gradient(160deg, var(--primary), var(--primary-dark));
  color: #fff;
  padding: 2.5rem 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 1rem;
}
.login-panel-brand img {
  width: 96px;
  height: 96px;
  border-radius: 20px;
  background: rgba(255,255,255,0.15);
  padding: 10px;
}
.login-panel-brand h1 {
  font-size: 1.35rem;
  margin: 0;
}
.login-panel-brand p {
  margin: 0;
  font-size: 0.9rem;
  opacity: 0.85;
  max-width: 260px;
}
.login-panel-form {
  padding: 2.5rem 2.25rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.login-panel-form h2 {
  margin: 0 0 0.25rem;
  font-size: 1.4rem;
}
.login-panel-form > p.subtitle {
  margin: 0 0 1.5rem;
  color: var(--text-light);
  font-size: 0.9rem;
}
.login-field {
  margin-bottom: 1.1rem;
}
.login-field label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.35rem;
}
.login-input-wrap {
  position: relative;
}
.login-input-wrap i {
  position: absolute;
  left: 0.85rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-light);
  font-size: 0.9rem;
}
.login-input-wrap input {
  width: 100%;
  padding: 0.65rem 0.85rem 0.65rem 2.35rem;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
}
.login-input-wrap input:focus {
  outline: none;
  border-color: var(--accent);
}
.login-input-wrap .toggle-pass {
  left: auto;
  right: 0.85rem;
  cursor: pointer;
}
.login-remember {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
  font-size: 0.82rem;
  color: var(--text-light);
}
.login-remember label {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  cursor: pointer;
}
.login-submit {
  width: 100%;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 0.75rem;
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: background 0.2s;
}
.login-submit:hover {
  background: var(--primary-dark);
}
.login-error {
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: #b91c1c;
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.8rem;
  font-size: 0.85rem;
  margin-bottom: 1.1rem;
}
.login-footer {
  text-align: center;
  color: var(--text-light);
  font-size: 0.78rem;
  margin-top: 1.5rem;
}
@media (max-width: 720px) {
  .login-shell { grid-template-columns: 1fr; }
  .login-panel-brand { padding: 2rem 1.5rem; }
}

/* ============================================================
   ADMIN - gestión de usuarios
   ============================================================ */
.admin-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1.5rem;
}
.admin-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
  gap: 0.75rem;
}
.admin-header h1 {
  font-size: 1.3rem;
  margin: 0;
}
.admin-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.25rem;
  margin-bottom: 1.5rem;
}
.admin-card h2 {
  font-size: 1rem;
  margin: 0 0 1rem;
}
.admin-form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.85rem;
  align-items: end;
}
.admin-form-grid label {
  display: block;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: 0.4px;
  margin-bottom: 0.3rem;
}
.admin-form-grid input,
.admin-form-grid select {
  width: 100%;
  padding: 0.55rem 0.7rem;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  border: none;
  border-radius: var(--radius-sm);
  padding: 0.55rem 1rem;
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s, opacity 0.15s;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-secondary { background: var(--bg); color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { background: var(--border); }
.btn-danger { background: #fef2f2; color: var(--danger); border: 1px solid #fecaca; }
.btn-danger:hover { background: #fee2e2; }
.btn-sm { padding: 0.35rem 0.65rem; font-size: 0.78rem; }
table.admin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.86rem;
}
table.admin-table th, table.admin-table td {
  text-align: left;
  padding: 0.65rem 0.6rem;
  border-bottom: 1px solid var(--border);
}
table.admin-table th {
  color: var(--text-light);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.4px;
}
.badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
}
.badge-admin { background: #fffbeb; color: #b45309; }
.badge-visitante { background: #eff6ff; color: var(--primary); }
.badge-activo { background: #f0fdf4; color: #16a34a; }
.badge-inactivo { background: #f1f5f9; color: var(--text-light); }
.admin-actions { display: flex; gap: 0.4rem; flex-wrap: wrap; }
.flash-message {
  border-radius: var(--radius-sm);
  padding: 0.65rem 0.9rem;
  font-size: 0.85rem;
  margin-bottom: 1.25rem;
}
.flash-success { background: #f0fdf4; color: #16a34a; border: 1px solid #bbf7d0; }
.flash-error { background: #fef2f2; color: #b91c1c; border: 1px solid #fecaca; }