body {
    margin: 0;
    font-family: 'Inter', sans-serif;
    background: #f3f4f6;
    display: flex;
}

.sidebar {
    width: 250px;
    min-height: 100vh;
    background: rgba(255, 255, 255, 0.35);
    backdrop-filter: blur(15px);
    box-shadow: 4px 0 20px rgba(0,0,0,0.1);
    padding: 25px;
    display: flex;
    flex-direction: column;
}

.logo {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 30px;
}

.sidebar ul {
    list-style: none;
    padding: 0;
    flex-grow: 1;
}

.sidebar li {
    padding: 12px 12px;
    border-radius: 12px;
    cursor: pointer;
    margin-bottom: 6px;
    transition: 0.2s;
    font-size: 15px;
}

.sidebar li:hover {
    background: rgba(255,255,255,0.45);
}

.sidebar .active {
    background: #6366f1;
    color: white;
}

.logout {
    margin-top: auto;
    color: #ef4444;
    font-weight: 600;
}

.content {
    flex: 1;
    padding: 35px;
}

header h1 {
    margin: 0 0 25px 0;
}

.cards {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
}

.card {
    flex: 1;
    min-width: 220px;
    background: white;
    padding: 20px;
    border-radius: 18px;
    box-shadow: 0 8px 20px rgba(0,0,0,0.1);
    transition: 0.2s;
}

.card:hover {
    transform: translateY(-4px);
}

/* mobile adaptive */
@media (max-width: 768px) {
    body {
        flex-direction: column;
    }
    .sidebar {
        width: 100%;
        height: auto;
        flex-direction: row;
        overflow-x: auto;
    }
    .sidebar ul {
        display: flex;
        flex-direction: row;
        gap: 10px;
    }
    .logout {
        margin: 0;
    }
}