@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --bg-gradient-1: #0f172a;
    --bg-gradient-2: #1e1b4b;
    --surface: rgba(255, 255, 255, 0.05);
    --surface-border: rgba(255, 255, 255, 0.1);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --danger: #ef4444;
    --success: #22c55e;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background: linear-gradient(135deg, var(--bg-gradient-1), var(--bg-gradient-2));
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
}

/* Glassmorphism utility */
.glass {
    background: var(--surface);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--surface-border);
    border-radius: 16px;
}

/* Sidebar */
.sidebar {
    width: 260px;
    height: 100vh;
    position: fixed;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    border-right: 1px solid var(--surface-border);
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(12px);
}

.sidebar-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--surface-border);
}

.nav-link {
    text-decoration: none;
    color: var(--text-muted);
    padding: 12px 16px;
    border-radius: 8px;
    font-weight: 500;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 12px;
    border-left: 4px solid transparent;
}

.nav-link:hover, .nav-link.active {
    background: linear-gradient(90deg, var(--primary) 0%, transparent 100%);
    border-left: 4px solid #8b5cf6;
    color: #fff;
    transform: translateX(4px);
}

.nav-link.logout {
    margin-top: auto;
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
}
.nav-link.logout:hover {
    background: var(--danger);
    color: white;
}

/* Main Content */
.main-content {
    margin-left: 260px;
    padding: 40px;
    width: calc(100% - 260px);
}

h2 {
    font-size: 1.875rem;
    margin-bottom: 24px;
    font-weight: 600;
}

/* Cards & Forms */
.card {
    padding: 24px;
    margin-bottom: 24px;
}

.card h3 {
    margin-bottom: 16px;
    font-size: 1.25rem;
    color: var(--text-main);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-muted);
    font-size: 0.875rem;
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--surface-border);
    border-radius: 8px;
    color: #fff;
    font-size: 1rem;
    transition: all 0.3s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    background: rgba(255, 255, 255, 0.1);
}

.btn {
    padding: 12px 24px;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s;
}

.btn:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

/* Login Page specific */
.login-container {
    width: 100vw;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-card {
    width: 100%;
    max-width: 400px;
    padding: 40px;
}

/* Tables */
.table-wrapper {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 16px;
}

th, td {
    padding: 16px;
    text-align: left;
    border-bottom: 1px solid var(--surface-border);
}

th {
    color: var(--text-muted);
    font-weight: 500;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

td {
    font-size: 0.95rem;
}

tr:hover td {
    background: rgba(255, 255, 255, 0.02);
}

.badge {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge.success { background: rgba(34, 197, 94, 0.1); color: var(--success); border: 1px solid rgba(34,197,94,0.2); }
.badge.danger { background: rgba(239, 68, 68, 0.1); color: var(--danger); border: 1px solid rgba(239,68,68,0.2); }

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

/* Modern Header & Responsive Layout */
.top-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--surface-border);
    margin-bottom: 24px;
    border-radius: 12px;
}

.header-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: #fff;
    display: flex;
    align-items: center;
    gap: 12px;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: #fff;
    font-size: 1.5rem;
    cursor: pointer;
}

/* Responsive Rules */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        z-index: 1000;
        transition: transform 0.3s ease;
    }
    
    .sidebar.active {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
        width: 100%;
        padding: 20px;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .stats-grid {
        grid-template-columns: 1fr !important;
    }
    
    .form-row {
        flex-direction: column;
    }
}