/* Menu/Sidebar Styling */
.menu {
    background: #2c3e50;
    color: white;
    width: 280px;
    padding: 20px;
    flex-shrink: 0;
    box-sizing: border-box;
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
    margin: 0;
}

.menu h2 {
    margin: 0 0 20px 0;
    font-size: 24px;
}

.menu-btn {
    display: block;
    width: 100%;
    padding: 15px;
    margin-bottom: 10px;
    background: #34495e;
    color: white;
    border: none;
    border-left: 3px solid #34495e;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    text-align: left;
    transition: all 0.3s;
    text-decoration: none;
}

.menu-btn:hover {
    background: #4a5f7f;
    border-left-color: #3498db;
}

.menu-btn.active {
    background: #3498db;
    border-left-color: #2980b9;
}

.menu-btn.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

.menu-submenu {
    display: none;
    width: 100%;
    padding: 12px 15px 12px 30px;
    margin-bottom: 10px;
    background: #2a3d4e;
    color: #bdc3c7;
    border: none;
    border-left: 3px solid #34495e;
    border-radius: 5px;
    cursor: pointer;
    font-size: 14px;
    text-align: left;
    transition: all 0.3s;
    text-decoration: none;
}

.menu-submenu.show {
    display: block;
}

.menu-submenu:hover {
    background: #3a4d5e;
    color: white;
    border-left-color: #3498db;
}

.menu-submenu.active {
    background: #2980b9;
    color: white;
    border-left-color: #3498db;
}

.menu-section {
    color: #95a5a6;
    font-size: 11px;
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 1px;
    margin-top: 20px;
    margin-bottom: 8px;
    padding-left: 5px;
}

.menu-section:first-of-type {
    margin-top: 15px;
}

.menu-logo {
    height: 32px;
    vertical-align: middle;
    margin-right: 8px;
}

/* Responsive menu */
@media (max-width: 768px) {
    .container {
        flex-direction: column;
    }
    
    body.menu-open {
        overflow: hidden;
    }
    
    .menu {
        width: 100%;
        padding: 15px;
        position: relative;
        z-index: 100;
        max-height: 60px;
        overflow: hidden;
        transition: none;
    }
    
    .menu.open {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        max-height: 100vh;
        height: 100vh;
        overflow-y: scroll;
        padding-bottom: 100px;
    }
    
    .menu h2 {
        font-size: 18px;
        display: flex;
        justify-content: space-between;
        align-items: center;
        cursor: pointer;
        margin-bottom: 15px;
    }
    
    .menu.open h2 {
        position: sticky;
        top: 0;
        background: #2c3e50;
        padding: 10px 0;
        margin-bottom: 15px;
        z-index: 10;
    }
    
    .menu h2::after {
        content: '☰';
        font-size: 24px;
    }
    
    .menu.open h2::after {
        content: '✕';
    }
    
    .menu-btn {
        padding: 12px;
        font-size: 14px;
    }
    
    .menu-section {
        font-size: 10px;
    }
}

@media (max-width: 480px) {
    .menu {
        padding: 10px;
    }
    
    .menu h2 {
        font-size: 16px;
    }
    
    .menu-btn {
        padding: 10px;
        font-size: 13px;
        margin-bottom: 8px;
    }
}