:root {
    --ncc-navy: #1a1a2e;
    --ncc-dark-navy: #0f0f1a;
    --ncc-light: #f8f9fa;
    --ncc-white: #ffffff;
    --ncc-accent: #4a90e2;
    --ncc-border: #dee2e6;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--ncc-light);
    color: #333;
    line-height: 1.6;
}

/* Header */
.site-header {
    background-color: var(--ncc-navy);
    color: var(--ncc-white);
    padding: 1rem 0;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.site-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.site-header .logo {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--ncc-white);
    text-decoration: none;
}

.site-header .logo img {
    max-height: 50px;
}

.site-header nav a {
    color: var(--ncc-white);
    text-decoration: none;
    margin-left: 1.5rem;
    transition: opacity 0.2s;
}

.site-header nav a:hover {
    opacity: 0.8;
}

/* Login Page */
.login-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--ncc-dark-navy) 0%, var(--ncc-navy) 100%);
}

.login-box {
    background: var(--ncc-white);
    padding: 3rem;
    border-radius: 8px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.3);
    width: 100%;
    max-width: 420px;
}

.login-box .logo-container {
    text-align: center;
    margin-bottom: 2rem;
}

.login-box .logo-container img {
    max-width: 200px;
    height: auto;
}

.login-box h2 {
    text-align: center;
    margin-bottom: 1.5rem;
    color: var(--ncc-navy);
}

.login-box .alert {
    margin-bottom: 1rem;
}

/* Dashboard */
.dashboard-wrapper {
    min-height: 100vh;
    background-color: var(--ncc-light);
}

.dashboard-sidebar {
    background-color: var(--ncc-navy);
    min-height: calc(100vh - 72px);
    padding: 2rem 0;
}

.dashboard-sidebar .nav-link {
    color: rgba(255,255,255,0.8);
    padding: 0.75rem 1.5rem;
    margin-bottom: 0.5rem;
    border-radius: 4px;
    transition: all 0.2s;
}

.dashboard-sidebar .nav-link:hover,
.dashboard-sidebar .nav-link.active {
    background-color: rgba(255,255,255,0.1);
    color: var(--ncc-white);
}

.dashboard-sidebar .nav-link i {
    margin-right: 0.5rem;
}

.dashboard-content {
    padding: 2rem;
}

/* Cards */
.stat-card {
    background: var(--ncc-white);
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    margin-bottom: 1.5rem;
    transition: transform 0.2s, box-shadow 0.2s;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.12);
}

.stat-card h3 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--ncc-navy);
    margin-bottom: 0.5rem;
}

.stat-card p {
    color: #6c757d;
    font-size: 0.9rem;
    margin: 0;
}

/* Tables */
.data-table {
    background: var(--ncc-white);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.data-table .table {
    margin: 0;
}

.data-table thead {
    background-color: var(--ncc-navy);
    color: var(--ncc-white);
}

.data-table thead th {
    border: none;
    font-weight: 600;
    padding: 1rem;
}

.data-table tbody td {
    padding: 1rem;
    vertical-align: middle;
}

.data-table tbody tr:hover {
    background-color: #f8f9fa;
}

/* Buttons */
.btn-ncc-primary {
    background-color: var(--ncc-navy);
    border-color: var(--ncc-navy);
    color: var(--ncc-white);
}

.btn-ncc-primary:hover {
    background-color: var(--ncc-dark-navy);
    border-color: var(--ncc-dark-navy);
    color: var(--ncc-white);
}

/* Forms */
.form-control:focus {
    border-color: var(--ncc-accent);
    box-shadow: 0 0 0 0.2rem rgba(74, 144, 226, 0.25);
}

/* Utility Classes */
.page-header {
    margin-bottom: 2rem;
}

.page-header h1 {
    font-size: 2rem;
    font-weight: 600;
    color: var(--ncc-navy);
    margin-bottom: 0.5rem;
}

.page-header p {
    color: #6c757d;
    margin: 0;
}

.empty-state {
    text-align: center;
    padding: 3rem;
    color: #6c757d;
}

.empty-state i {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.3;
}

.empty-state h3 {
    margin-bottom: 0.5rem;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .dashboard-sidebar {
        min-height: auto;
        padding: 1rem 0;
    }
    
    .login-box {
        margin: 1rem;
        padding: 2rem;
    }
    
    .dashboard-content {
        padding: 1rem;
    }
}