:root {
    --primary: #0d9488;
    --primary-dark: #0f766e;
    --primary-light: #5eead4;
    --dark: #0f172a;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-800: #1e293b;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--gray-50);
    color: var(--gray-800);
}
.text-primary { color: var(--primary) !important; }
.bg-primary { background: var(--primary) !important; }
.btn-primary { background: var(--primary); border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); }

.navbar-brand { font-weight: 800; color: var(--primary) !important; }
.navbar-brand i { color: var(--primary); }
.nav-link { font-weight: 500; color: var(--gray-600) !important; border-radius: 8px; }
.nav-link:hover { color: var(--primary) !important; background: var(--gray-100); }

.hero {
    background: linear-gradient(135deg, #0f766e 0%, #0d9488 60%, #22d3ee 100%);
    color: white; padding: 5rem 0;
}
.feature-card { border: 1px solid var(--gray-200); border-radius: 16px; transition: .2s; background: #fff; }
.feature-card:hover { transform: translateY(-4px); box-shadow: 0 12px 30px rgba(13,148,136,.12); }

/* App shell */
.app-sidebar {
    width: 240px; min-height: 100vh; background: var(--dark); color: #cbd5e1;
    position: fixed; left: 0; top: 0; padding: 1.2rem 1rem; z-index: 1030;
}
.app-sidebar .brand { color: #fff; font-weight: 800; font-size: 1.25rem; display: block; margin-bottom: 1.5rem; }
.app-sidebar a { color: #cbd5e1; display: flex; align-items: center; gap: 10px; padding: .6rem .8rem; border-radius: 10px; text-decoration: none; margin-bottom: 4px; }
.app-sidebar a:hover, .app-sidebar a.active { background: rgba(94,234,212,.16); color: #fff; }
.app-sidebar .logout { margin-top: 1.5rem; color: #fca5a5; }
.app-main { margin-left: 240px; padding: 1.5rem 2rem; min-height: 100vh; }
.stat-card { border-radius: 14px; border: none; box-shadow: 0 2px 12px rgba(15,23,42,.06); }
.stat-card .icon { width: 48px; height: 48px; border-radius: 12px; display: grid; place-items: center; font-size: 1.3rem; }
.table th { font-weight: 600; color: var(--gray-600); text-transform: uppercase; font-size: .72rem; letter-spacing: .04em; }
.card { border-radius: 14px; border-color: var(--gray-200); }
.form-control:focus, .form-select:focus { border-color: var(--primary); box-shadow: 0 0 0 .2rem rgba(13,148,136,.15); }
@media (max-width: 768px) {
    .app-sidebar { transform: translateX(-100%); transition: .3s; }
    .app-sidebar.show { transform: translateX(0); }
    .app-main { margin-left: 0; }
}