:root {
    --purple: #6f42c1;
    --yellow: #ffc107;
    --light-bg: #ffffff;
}

body {
    background-color: var(--light-bg);
    font-family: 'Segoe UI', Roboto, system-ui;
}

.sidebar {
    background-color: var(--purple);
    min-height: 100vh;
    width: 280px;
    position: fixed;
    left: 0;
    top: 0;
    transition: 0.3s;
    z-index: 1000;
}

.sidebar .nav-link {
    color: rgba(255,255,255,0.85);
    font-weight: 500;
    padding: 12px 20px;
    border-radius: 12px;
    margin: 4px 12px;
}

.sidebar .nav-link:hover {
    background-color: rgba(255,255,255,0.15);
    color: white;
}

.sidebar .nav-link.active {
    background-color: var(--yellow);
    color: #2c2c2c;
}

.sidebar .nav-link i {
    width: 28px;
    margin-right: 12px;
}

.main-content {
    margin-left: 280px;
    padding: 20px 30px;
}

.btn-yellow {
    background-color: var(--yellow);
    border-color: var(--yellow);
    color: #1e1e2a;
    font-weight: 500;
}

.btn-yellow:hover {
    background-color: #e0a800;
    border-color: #d39e00;
}

.nav-tabs .nav-link.active {
    color: var(--purple);
    border-bottom: 3px solid var(--yellow);
    font-weight: 600;
}

.stat-card {
    background: #f8f6ff;
    border-left: 5px solid var(--yellow);
    border-radius: 16px;
    padding: 1rem;
}

.star-rating {
    display: inline-flex;
    gap: 4px;
    color: #ffc107;
}

.modal-content {
    border-radius: 20px;
}

@media (max-width: 768px) {
    .sidebar {
        width: 100%;
        position: relative;
        min-height: auto;
    }
    .main-content {
        margin-left: 0;
    }
}