:root {
    --bg-primary: #000000;
    --bg-secondary: #111111;
    --bg-card: #1a1a1a;
    --text-primary: #ffffff;
    --text-secondary: #cccccc;
    --accent: #FFD700;
    --accent-hover: #FFC107;
    --danger: #ff4444;
    --danger-hover: #cc3333;
    --success: #44ff44;
    --success-hover: #33cc33;
    --border: #333333;
}

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

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: var(--accent-hover);
}

.navbar {
    background-color: var(--bg-secondary);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 2px solid var(--accent);
}

.nav-brand a {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--accent);
}

.nav-brand a:hover {
    color: var(--accent-hover);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.nav-links a {
    color: var(--text-secondary);
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: all 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--accent);
    background-color: var(--bg-card);
}

.nav-user {
    color: var(--text-secondary);
    font-size: 0.9rem;
    padding: 0 1rem;
}

.btn-logout {
    background-color: var(--danger);
    color: var(--bg-primary) !important;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    font-weight: bold;
}

.btn-logout:hover {
    background-color: var(--danger-hover);
}

.container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 2rem;
    flex: 1;
}

.card {
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 2rem;
    margin-bottom: 2rem;
}

.card h1, .card h2 {
    color: var(--accent);
    margin-bottom: 1rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 0.75rem;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-primary);
    font-size: 1rem;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--accent);
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background-color: var(--accent);
    color: var(--bg-primary);
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.2s;
    text-decoration: none;
}

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

.btn-danger {
    background-color: var(--danger);
}

.btn-danger:hover {
    background-color: var(--danger-hover);
}

.btn-success {
    background-color: var(--success);
}

.btn-success:hover {
    background-color: var(--success-hover);
}

.btn-sm {
    padding: 0.4rem 0.8rem;
    font-size: 0.875rem;
}

.alert {
    padding: 1rem;
    border-radius: 4px;
    margin-bottom: 1rem;
}

.alert-error {
    background-color: rgba(255, 68, 68, 0.1);
    border: 1px solid var(--danger);
    color: var(--danger);
}

.alert-success {
    background-color: rgba(68, 255, 68, 0.1);
    border: 1px solid var(--success);
    color: var(--success);
}

.login-container {
    max-width: 400px;
    margin: 5rem auto;
}

.login-container h1 {
    text-align: center;
    margin-bottom: 2rem;
}

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

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

th {
    background-color: var(--bg-secondary);
    color: var(--accent);
    font-weight: 600;
}

tr:hover {
    background-color: var(--bg-secondary);
}

.actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

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

.stat-card {
    background-color: var(--bg-card);
    border: 1px solid var(--accent);
    border-radius: 8px;
    padding: 1.5rem;
    text-align: center;
}

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

.stat-card .value {
    color: var(--accent);
    font-size: 2rem;
    font-weight: bold;
}

.footer {
    background-color: var(--bg-secondary);
    padding: 1rem;
    text-align: center;
    border-top: 1px solid var(--border);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    z-index: 1000;
    justify-content: center;
    align-items: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background-color: var(--bg-card);
    border: 2px solid var(--accent);
    border-radius: 8px;
    padding: 2rem;
    max-width: 400px;
    width: 90%;
}

.modal-content h3 {
    color: var(--accent);
    margin-bottom: 1rem;
}

.modal-actions {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
    margin-top: 1.5rem;
}

@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .stats {
        grid-template-columns: 1fr;
    }
    
    table {
        font-size: 0.875rem;
    }
    
    th, td {
        padding: 0.5rem;
    }
}