:root {
    --bg-dark: #0f172a;
    --bg-card: rgba(30, 41, 59, 0.7);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --danger: #ef4444;
    --success: #22c55e;
    --warning: #eab308;
    --glass-border: rgba(255, 255, 255, 0.1);
    --sidebar-width: 260px;
    --header-height: 64px;
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    overflow-x: hidden;
    min-height: 100vh;
}

/* Glassmorphism Utilities */
.glass {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
}

.glass-panel {
    border-radius: 16px;
    padding: 1.5rem;
}

/* Auth Layout */
.auth-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: radial-gradient(circle at top right, #1e293b, #0f172a);
}

.auth-box {
    width: 100%;
    max-width: 400px;
}

/* Dashboard Layout */
.app-layout {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: var(--sidebar-width);
    position: fixed;
    height: 100vh;
    border-right: 1px solid var(--glass-border);
    display: flex;
    flex-direction: column;
    z-index: 50; /* Higher z-index for mobile overlay */
    overflow-y: auto; /* Add scroll */
    transition: transform 0.3s ease;
}

/* Custom Scrollbar for Sidebar */
.sidebar::-webkit-scrollbar {
    width: 4px;
}
.sidebar::-webkit-scrollbar-track {
    background: transparent;
}
.sidebar::-webkit-scrollbar-thumb {
    background: var(--glass-border);
    border-radius: 4px;
}

/* Mobile Overlay */
.sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: rgba(0,0,0,0.5);
    backdrop-filter: blur(2px);
    z-index: 40;
}
.sidebar-overlay.active {
    display: block;
}

.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
}

.top-header {
    height: var(--header-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    position: sticky;
    top: 0;
    z-index: 9;
    background: rgba(15, 23, 42, 0.8);
}

.content-wrapper {
    padding: 2rem;
    animation: fadeIn 0.4s ease;
}

/* Components */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    border: none;
    text-decoration: none;
    gap: 0.5rem;
}

.btn-primary {
    background: var(--accent);
    color: white;
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
}

.btn-danger {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-input {
    width: 100%;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    background: rgba(15, 23, 42, 0.5);
    border: 1px solid var(--glass-border);
    color: white;
    transition: 0.2s;
}

.form-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: rgba(59, 130, 246, 0.1);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    gap: 0.75rem;
    padding: 0.75rem 1.25rem; /* Reduced padding */
    font-size: 0.95rem; /* Slightly smaller font */
    color: var(--text-secondary);
    text-decoration: none;
    transition: 0.2s;
    border-left: 3px solid transparent;
}

.nav-link:hover, .nav-link.active {
    background: rgba(255, 255, 255, 0.03);
    color: var(--text-primary);
}

.nav-link.active {
    border-left-color: var(--accent);
}

.table-container {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

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

th {
    color: var(--text-secondary);
    font-weight: 500;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Animations */
.animate-pulse {
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar { 
        transform: translateX(-100%); 
        width: 80%; /* Wider sidebar on mobile */
        max-width: 300px;
        background: var(--bg-dark); /* Solid background on mobile */
    }
    .sidebar.open { transform: translateX(0); }
    .main-content { margin-left: 0; }
    
    .top-header {
        padding: 0 1rem;
    }
    
    .content-wrapper {
        padding: 1rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr; /* Stack stats on mobile */
    }
    
    .table-container {
        border-radius: 8px;
    }
    
    /* Show hamburger menu */
    .btn-toggle-sidebar {
        display: block !important;
    }
}
@media (min-width: 769px) {
    .btn-toggle-sidebar {
        display: none !important;
    }
}