:root {
    --primary: #005DAA;
    --primary-dark: #004a88;
    --secondary: #D91B5C;
    --accent: #FFD700;
    --bg-main: #f4f7f6;
    --bg-sidebar: #1a1a2e;
    --text-main: #333;
    --text-muted: #666;
    --white: #ffffff;
    --card-shadow: 0 4px 6px rgba(0,0,0,0.05);
    --border-radius: 8px;
}

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

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background-color: var(--bg-sidebar);
    color: var(--white);
    padding: 2rem 1rem;
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
}

.sidebar-logo {
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 2rem;
    text-align: center;
    color: var(--accent);
}

.nav-menu {
    list-style: none;
    flex-grow: 1;
}

.nav-item {
    margin-bottom: 0.5rem;
}

.nav-link {
    display: flex;
    align-items: center;
    padding: 0.75rem 1rem;
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    border-radius: var(--border-radius);
    transition: all 0.3s ease;
}

.nav-link:hover, .nav-link.active {
    background-color: var(--primary);
    color: var(--white);
}

.nav-link i {
    margin-right: 0.75rem;
    width: 20px;
}

.logout-btn {
    margin-top: auto;
    padding: 0.75rem 1rem;
    color: #ff4d4d;
    text-decoration: none;
    display: flex;
    align-items: center;
    cursor: pointer;
}

/* Main Content */
.main-content {
    margin-left: 260px;
    flex-grow: 1;
    padding: 2rem;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.header h1 {
    font-size: 1.75rem;
}

/* Cards & Stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--white);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--card-shadow);
}

.stat-card h3 {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.stat-card .value {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary);
}

/* Tables */
.data-card {
    background: var(--white);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--card-shadow);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

.data-table th, .data-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid #eee;
}

.data-table th {
    background-color: #f9f9f9;
    font-weight: 600;
}

.btn {
    padding: 0.5rem 1rem;
    border-radius: 4px;
    border: none;
    cursor: pointer;
    font-weight: 500;
    transition: opacity 0.3s;
}

.btn-primary { background: var(--primary); color: white; }
.btn-secondary { background: #6c757d; color: white; }
.btn-danger { background: #dc3545; color: white; }
.btn:hover { opacity: 0.9; }

/* Login Page Specific */
.login-body {
    justify-content: center;
    align-items: center;
}

.login-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: var(--border-radius);
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
    width: 100%;
    max-width: 400px;
}

.login-card h2 {
    text-align: center;
    margin-bottom: 1.5rem;
    color: var(--primary);
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ddd;
    border-radius: 4px;
}

.alert {
    padding: 1rem;
    border-radius: 4px;
    margin-bottom: 1rem;
    display: none;
}

.alert-danger { background: #f8d7da; color: #721c24; }

/* Status Badges */
.badge {
    display: inline-block;
    padding: 0.25rem 0.6rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.badge-pending {
    background: #fff3cd;
    color: #856404;
    border: 1px solid #ffc107;
}
.badge-approved {
    background: #d1e7dd;
    color: #0a3622;
}
.badge-sm { font-size: 0.7rem; }

/* Tab navigation for admin tables */
.tab-nav {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    border-bottom: 2px solid #eee;
    padding-bottom: 0;
}
.tab-nav-btn {
    padding: 0.6rem 1.25rem;
    border: none;
    background: transparent;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-muted);
    border-bottom: 3px solid transparent;
    margin-bottom: -2px;
    transition: all 0.2s;
}
.tab-nav-btn.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}
.tab-nav-btn .count-pill {
    display: inline-block;
    background: #dc3545;
    color: white;
    border-radius: 20px;
    font-size: 0.7rem;
    padding: 0.1rem 0.5rem;
    margin-left: 0.4rem;
}
.btn-sm { padding: 0.3rem 0.7rem; font-size: 0.85rem; }