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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #f5f7fa;
    color: #333;
    overflow-x: hidden;
}

.layout-container {
    display: flex;
    min-height: 100vh;
    position: relative;
}

/* Sidebar Styles */
.sidebar {
    background: linear-gradient(180deg, #667eea 0%, #764ba2 100%);
    color: white;
    transition: all 0.3s ease;
    width: 280px;
    height: 100vh;
    position: fixed;
    left: 0;
    top: 0;
    box-shadow: 2px 0 10px rgba(0,0,0,0.1);
    z-index: 1000;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    overflow-y: auto;
}

    .sidebar.collapsed {
        width: 80px;
    }

/* Header */
.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
    min-height: 80px;
}

.sidebar.collapsed .sidebar-header {
    padding: 20px 12px;
    justify-content: center;
}

.logo {
    display: flex;
    align-items: center;
    font-size: 1.2rem;
    font-weight: 700;
    white-space: nowrap;
}

    .logo i {
        margin-right: 10px;
        font-size: 1.5rem;
        display: flex;
        align-items: center;
        justify-content: center;
        width: 30px;
        height: 30px;
    }

.sidebar.collapsed .logo i {
    margin-right: 0;
    font-size: 1.8rem;
}

.sidebar.collapsed .logo-text {
    display: none;
}

.toggle-btn {
    background: rgba(255,255,255,0.1);
    border: none;
    color: white;
    padding: 6px 8px;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
}

    .toggle-btn:hover {
        background: rgba(255,255,255,0.2);
    }

    .toggle-btn i {
        font-size: 14px;
    }

.sidebar.collapsed .toggle-btn {
    position: fixed;
    left: 65px;
    top: 20px;
    background: white;
    color: #667eea;
    box-shadow: 0 2px 10px rgba(0,0,0,0.15);
    z-index: 1100;
}

    .sidebar.collapsed .toggle-btn:hover {
        background: #f0f3ff;
        color: #667eea;
    }

/* Menu Container */
.menu-container {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding-bottom: 20px;
}

/* Menu Items */
.menu {
    padding: 0;
    list-style: none;
}

.menu-item {
    position: relative;
}

.menu-link {
    display: flex;
    align-items: center;
    padding: 15px 20px;
    color: rgba(255,255,255,0.9);
    text-decoration: none;
    transition: all 0.3s ease;
    border-left: 3px solid transparent;
    cursor: pointer;
    user-select: none;
    min-height: 50px;
}

.sidebar.collapsed .menu-link {
    padding: 15px 12px;
    justify-content: center;
}

.menu-link:hover {
    background: rgba(255,255,255,0.1);
    color: white;
    border-left-color: rgba(255,255,255,0.5);
}

.menu-link.active {
    background: rgba(255,255,255,0.15);
    border-left-color: white;
    color: white;
}

.menu-icon {
    min-width: 24px;
    width: 24px;
    margin-right: 12px;
    font-size: 18px;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
}

.sidebar.collapsed .menu-icon {
    margin-right: 0;
    font-size: 20px;
}

.menu-text {
    flex: 1;
    transition: all 0.3s ease;
}

.sidebar.collapsed .menu-text {
    display: none;
}

.menu-arrow {
    transition: transform 0.3s ease;
    font-size: 12px;
}

.sidebar.collapsed .menu-arrow {
    display: none;
}

.menu-item.expanded .menu-arrow {
    transform: rotate(90deg);
}

/* Submenu */
.submenu {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    background: rgba(0,0,0,0.1);
}

.menu-item.expanded .submenu {
    max-height: 800px;
}

.sidebar.collapsed .submenu {
    display: none;
}

.submenu-item .menu-link {
    padding-left: 50px;
    font-size: 14px;
    border-left: none;
}

    .submenu-item .menu-link:hover {
        background: rgba(255,255,255,0.08);
    }

/* Third Level Submenu */
.third-submenu {
    display: none;
    list-style: none;
    padding-left: 0;
    margin: 0;
    background-color: rgba(0, 0, 0, 0.03);
    /* เพิ่มส่วนนี้ */
    max-height: 400px;
    overflow-y: auto;
    overflow-x: hidden;
}

.submenu-item.expanded > .third-submenu {
    display: block;
}

.third-submenu::-webkit-scrollbar {
    width: 5px;
}

.third-submenu::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.05);
}

.third-submenu::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.15);
    border-radius: 3px;
}
/* Floating Menu */
.floating-menu {
    position: fixed;
    left: 80px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    padding: 10px 0;
    min-width: 220px;
    z-index: 1001;
    display: none;
    color: #333;
}

.floating-menu-item {
    padding: 12px 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
}

    .floating-menu-item:hover {
        background: #f0f3ff;
        color: #667eea;
    }

    .floating-menu-item i.menu-icon {
        margin-right: 12px;
        min-width: 20px;
    }

    .floating-menu-item.has-submenu:hover {
        background: #e8f0fe;
    }

.floating-submenu {
    position: absolute;
    left: 100%;
    top: 0;
    background: white;
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    padding: 10px 0;
    min-width: 200px;
    display: none;
    z-index: 1002;
    margin-left: 5px;
}

    .floating-submenu .floating-menu-item {
        font-size: 13px;
        padding: 10px 18px;
    }

.floating-submenu {
    position: fixed;
    background: white;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    min-width: 200px;
    max-width: 300px;
    z-index: 1003;
    /* เพิ่มส่วนนี้ */
    max-height: 500px; /* เพิ่มความสูงสูงสุด */
    overflow-y: auto; /* เพิ่ม scrollbar */
    overflow-x: hidden;
}

    /* เพิ่ม scrollbar สวยงาม */
    .floating-submenu::-webkit-scrollbar {
        width: 6px;
    }

    .floating-submenu::-webkit-scrollbar-track {
        background: rgba(0, 0, 0, 0.05);
        border-radius: 3px;
    }

    .floating-submenu::-webkit-scrollbar-thumb {
        background: rgba(0, 0, 0, 0.2);
        border-radius: 3px;
    }

        .floating-submenu::-webkit-scrollbar-thumb:hover {
            background: rgba(0, 0, 0, 0.3);
        }

    .floating-submenu .floating-menu-item {
        padding: 10px 15px;
        cursor: pointer;
        transition: background-color 0.2s;
        white-space: nowrap;
    }

        .floating-submenu .floating-menu-item:hover {
            background-color: #f5f5f5;
        }

        .floating-submenu .floating-menu-item:first-child {
            border-radius: 8px 8px 0 0;
        }

        .floating-submenu .floating-menu-item:last-child {
            border-radius: 0 0 8px 8px;
        }

/* User Profile Section */
.user-profile {
    padding: 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    flex-shrink: 0;
    background: rgba(0,0,0,0.1);
}

    .user-profile:hover {
        background: rgba(255,255,255,0.1);
    }

.sidebar.collapsed .user-profile {
    padding: 15px;
    justify-content: center;
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: white;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #667eea;
    font-weight: 700;
    font-size: 18px;
    flex-shrink: 0;
}

.user-info {
    flex: 1;
    min-width: 0;
}

.sidebar.collapsed .user-info {
    display: none;
}

.user-name {
    font-weight: 600;
    font-size: 14px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-role {
    font-size: 12px;
    opacity: 0.8;
}

.user-dropdown-icon {
    font-size: 12px;
    transition: transform 0.3s ease;
}

.sidebar.collapsed .user-dropdown-icon {
    display: none;
}

/* Custom Scrollbar */
.menu-container::-webkit-scrollbar {
    width: 6px;
}

.menu-container::-webkit-scrollbar-track {
    background: rgba(255,255,255,0.1);
}

.menu-container::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,0.3);
    border-radius: 3px;
}

    .menu-container::-webkit-scrollbar-thumb:hover {
        background: rgba(255,255,255,0.5);
    }

/* Mobile Overlay */
.mobile-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 1049;
    display: none;
}

    .mobile-overlay.active {
        display: block;
    }

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        left: -150px;
        z-index: 1050;
       
    }

        .sidebar.mobile-open {
            left: 0;
        }

        .sidebar.collapsed {
            left: -40px;
        }

    .mobile-toggle {
        display: block;
    }
}

.mobile-toggle {
    display: none;
    background: #667eea;
    color: white;
    border: none;
    padding: 10px;
    border-radius: 8px;
    cursor: pointer;
}