body {
    margin: 0;
    font-family: 'Segoe UI', sans-serif;
    background: #f5f5f5;
}

/* Sidebar */
.sidebar {
    position: fixed;
    width: 240px;
    height: 100vh;
    background: linear-gradient(180deg, #b30000, #ff1a1a);
    color: white;
    padding: 15px;
    transition: 0.3s;
}

.sidebar .logo {
    font-size: 22px;
    font-weight: bold;
    text-align: center;
    margin-bottom: 30px;
}

.sidebar .menu {
    list-style: none;
    padding: 0;
}

.sidebar .menu li {
    margin-bottom: 10px;
}

.sidebar .menu a {
    color: white;
    text-decoration: none;
    display: block;
    padding: 10px;
    border-radius: 8px;
}

.sidebar .menu li.active a,
.sidebar .menu a:hover {
    background: rgba(255,255,255,0.2);
}

/* Main */
.main {
    margin-left: 240px;
    padding: 15px;
    transition: 0.3s;
}

.topbar {
    background: white;
    padding: 10px 15px;
    border-radius: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.content {
    margin-top: 20px;
}

/* Cards */
.card {
    border: none;
    border-radius: 15px;
    color: white;
}

.card-red {
    background: #e60000;
}

.card-darkred {
    background: #b30000;
}

.card-softred {
    background: #ff4d4d;
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        left: -240px;
    }
    .sidebar.show {
        left: 0;
    }
    .main {
        margin-left: 0;
    }
}