@import url('https://fonts.googleapis.com/css2?family=Sarabun:wght@300;400;500;600;700&display=swap');

    :root {
        /* Modern SaaS Color Palette */
        --main-primary: #4f46e5; 
        --main-primary-hover: #4338ca; 
        --color-success: #10b981; 
        --color-warning: #f59e0b; 
        --color-danger: #ef4444; 
        --color-info: #0ea5e9; 
        
        /* Light Theme (Clean Glassmorphism) */
        --app-bg: #f0f4f8; 
        --glass-bg: rgba(255, 255, 255, 0.75);
        --glass-border: rgba(255, 255, 255, 0.6);
        --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.05);
        
        --sidebar-bg: linear-gradient(160deg, rgba(49, 46, 129, 0.85), rgba(79, 70, 229, 0.75));
        --sidebar-border: rgba(255, 255, 255, 0.15);
        --sidebar-text: rgba(255, 255, 255, 0.85);
        --sidebar-text-hover: #ffffff;
        
        --text-main: #1e293b;
        --text-muted: #64748b;
        --input-bg: rgba(255, 255, 255, 0.5);
        --main-primary-light: rgba(79, 70, 229, 0.1);
        --table-hover: rgba(255, 255, 255, 0.4);
    }
    
    /* --- Dark Theme Variables --- */
    [data-theme="dark"] {
        --app-bg: #0f172a; 
        --glass-bg: rgba(30, 41, 59, 0.75);
        --glass-border: rgba(255, 255, 255, 0.08);
        --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.4);
        
        --sidebar-bg: linear-gradient(160deg, rgba(15, 23, 42, 0.95), rgba(30, 41, 59, 0.85));
        --sidebar-border: rgba(255, 255, 255, 0.05);
        --sidebar-text: rgba(255, 255, 255, 0.7);
        --sidebar-text-hover: #ffffff;
        
        --text-main: #f1f5f9;
        --text-muted: #94a3b8;
        --input-bg: rgba(15, 23, 42, 0.6);
        --main-primary-light: rgba(79, 70, 229, 0.3);
        --table-hover: rgba(255, 255, 255, 0.05);
    }

    /* Dynamic Background for Glass Effect */
    body { 
        font-family: 'Sarabun', sans-serif; 
        background-color: var(--app-bg); 
        color: var(--text-main);
        overflow-x: hidden; 
        min-height: 100vh;
        transition: background-color 0.4s ease, color 0.4s ease;
    }
    
    /* Ambient Glow Backgrounds */
    body::before, body::after { 
        content: ''; position: fixed; border-radius: 50%; z-index: -1; 
        filter: blur(100px); opacity: 0.7; pointer-events: none; transition: all 0.5s ease;
    }
    body::before { top: -10%; left: -10%; width: 50vw; height: 50vw; background: rgba(79, 70, 229, 0.15); }
    body::after { bottom: -10%; right: -10%; width: 40vw; height: 40vw; background: rgba(14, 165, 233, 0.15); }

    [data-theme="dark"] body::before { background: rgba(79, 70, 229, 0.25); opacity: 0.4; }
    [data-theme="dark"] body::after { background: rgba(14, 165, 233, 0.25); opacity: 0.3; }

    /* Auto-Adapt Bootstrap Colors */
    .text-dark { color: var(--text-main) !important; }
    .text-muted, .text-secondary { color: var(--text-muted) !important; }
    .bg-white { background-color: var(--glass-bg) !important; border: 1px solid var(--glass-border); backdrop-filter: blur(16px); }
    .bg-light { background-color: var(--input-bg) !important; }

    /* --- STRICT DARK MODE OVERRIDES FOR LEGIBILITY --- */
    [data-theme="dark"] .text-dark,
    [data-theme="dark"] h1, [data-theme="dark"] h2, [data-theme="dark"] h3, [data-theme="dark"] h4, [data-theme="dark"] h5, [data-theme="dark"] h6,
    [data-theme="dark"] .form-label, 
    [data-theme="dark"] .card-title, 
    [data-theme="dark"] strong,
    [data-theme="dark"] .fw-bold,
    [data-theme="dark"] .table-glass td {
        color: #ffffff !important; 
    }

    [data-theme="dark"] .text-muted, 
    [data-theme="dark"] .text-secondary, 
    [data-theme="dark"] .table-glass th, 
    [data-theme="dark"] small {
        color: #cbd5e1 !important; 
    }

    [data-theme="dark"] .glass-panel, 
    [data-theme="dark"] .modal-content, 
    [data-theme="dark"] .stat-card-glass {
        background: rgba(15, 23, 42, 0.85) !important;
        border-color: rgba(255, 255, 255, 0.15) !important;
    }

    [data-theme="dark"] .glass-input, 
    [data-theme="dark"] .form-control, 
    [data-theme="dark"] .form-select, 
    [data-theme="dark"] .input-group-text, 
    [data-theme="dark"] .dropdown-toggle-btn {
        background-color: rgba(15, 23, 42, 0.8) !important;
        color: #ffffff !important;
        border-color: rgba(255, 255, 255, 0.2) !important;
    }
    
    [data-theme="dark"] .form-control::placeholder, 
    [data-theme="dark"] .form-select::placeholder, 
    [data-theme="dark"] .search-input::placeholder { color: #94a3b8 !important; opacity: 1 !important; }
    
    [data-theme="dark"] .checkbox-menu { background: rgba(15, 23, 42, 0.95) !important; border-color: rgba(255, 255, 255, 0.15) !important; }
    [data-theme="dark"] .checkbox-item { color: #ffffff !important; }
    [data-theme="dark"] .checkbox-item:hover { background-color: var(--main-primary) !important; color: #ffffff !important;}
    
    /* แก้ไขพื้นหลังตารางสีขาวของ Bootstrap ใน Dark Mode */
    [data-theme="dark"] .table { --bs-table-bg: transparent !important; background-color: transparent !important; }
    [data-theme="dark"] .table td, [data-theme="dark"] .table th { background-color: transparent !important; border-color: rgba(255,255,255,0.05); }

    [data-theme="dark"] .table-glass tbody tr { background-color: transparent !important; border-bottom: 1px solid rgba(255,255,255,0.05) !important; }
    [data-theme="dark"] .table-glass tbody tr:hover { background-color: rgba(255,255,255,0.1) !important; }
    [data-theme="dark"] .table-glass thead th { background: rgba(255,255,255,0.05) !important; border-bottom: 1px solid rgba(255,255,255,0.1) !important; }

    [data-theme="dark"] .badge.bg-warning, [data-theme="dark"] .badge.bg-info { color: #000 !important; }
    [data-theme="dark"] .badge.bg-light { background-color: rgba(255,255,255,0.1) !important; color: #ffffff !important; border: 1px solid rgba(255,255,255,0.2) !important;}
    
    /* แก้ไขปุ่มจัดการในตารางสำหรับ Dark Mode */
    [data-theme="dark"] .table-glass .btn-light { background-color: rgba(255, 255, 255, 0.1) !important; border-color: rgba(255, 255, 255, 0.15) !important; color: #ffffff !important; }
    [data-theme="dark"] .table-glass .btn-light:hover { background-color: rgba(255, 255, 255, 0.2) !important; }
    [data-theme="dark"] .table-glass .btn-light.text-warning { color: #fbbf24 !important; }
    [data-theme="dark"] .table-glass .btn-light.text-danger { color: #f87171 !important; }
    [data-theme="dark"] .table-glass .btn-light.text-primary { color: #60a5fa !important; }
    [data-theme="dark"] .table-glass .btn-light.text-success { color: #34d399 !important; }
    [data-theme="dark"] .table-glass .btn-light.text-info { color: #38bdf8 !important; }
    [data-theme="dark"] .table-glass .btn-light.text-secondary { color: #cbd5e1 !important; }
    
    /* แก้ไขสีและพื้นหลังปฏิทินใน Dark Mode */
    [data-theme="dark"] .fc-theme-standard td, [data-theme="dark"] .fc-theme-standard th { border-color: rgba(255,255,255,0.1) !important; background-color: transparent !important; }
    [data-theme="dark"] .fc-col-header-cell-cushion { color: #cbd5e1 !important; }
    [data-theme="dark"] .fc .fc-toolbar-title { color: #ffffff !important; }
    [data-theme="dark"] .fc-daygrid-day-number { color: #f8fafc !important; }
    [data-theme="dark"] .fc .fc-button-primary { background: var(--input-bg); color: var(--text-main); border-color: var(--glass-border); }

    [data-theme="dark"] .swal2-popup { background: rgba(15, 23, 42, 0.95) !important; color: #ffffff !important; border: 1px solid rgba(255,255,255,0.15) !important; backdrop-filter: blur(16px); }
    [data-theme="dark"] .swal2-title, [data-theme="dark"] .swal2-html-container { color: #ffffff !important; }
    
    [data-theme="dark"] #loginOverlay { background: rgba(15, 23, 42, 0.85) !important; }

    /* --- Login Section --- */
    #loginSection {
        background: linear-gradient(-45deg, #ee7752, #e73c7e, #23a6d5, #23d5ab);
        background-size: 400% 400%;
        animation: gradientBG 15s ease infinite;
        position: fixed;
        top: 0; left: 0; width: 100vw; height: 100vh;
        display: flex; align-items: center; justify-content: center;
        z-index: 2000;
    }

    @keyframes gradientBG {
        0% { background-position: 0% 50%; }
        50% { background-position: 100% 50%; }
        100% { background-position: 0% 50%; }
    }

    /* --- Glassmorphism Core Classes --- */
    .glass-panel {
        background: var(--glass-bg);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border: 1px solid var(--glass-border);
        box-shadow: var(--glass-shadow);
        transition: all 0.3s ease;
    }
    
    .glass-input {
        background: var(--input-bg) !important;
        border: 1px solid var(--glass-border) !important;
        backdrop-filter: blur(8px);
        color: var(--text-main) !important;
        transition: all 0.2s;
    }
    .glass-input:focus {
        background: var(--glass-bg) !important;
        border-color: var(--main-primary) !important;
        box-shadow: 0 0 0 0.25rem var(--main-primary-light) !important;
    }

    /* --- Sidebar Layout Styles --- */
    .wrapper { display: flex; width: 100%; align-items: stretch; min-height: 100vh; }
    
    #sidebar {
        min-width: 260px; max-width: 260px;
        background: var(--sidebar-bg);
        backdrop-filter: blur(24px);
        -webkit-backdrop-filter: blur(24px);
        border-right: 1px solid var(--sidebar-border);
        color: #fff;
        transition: all 0.3s;
        height: 100vh; position: fixed; top: 0; left: 0; z-index: 1040;
        
        overflow-y: scroll; 
        scrollbar-width: none !important;
        -ms-overflow-style: none !important;
    }
    
    #sidebar::-webkit-scrollbar, .sidebar-menu::-webkit-scrollbar, .sub-menu::-webkit-scrollbar {
        display: none !important;
        width: 0px !important;
        height: 0px !important;
        background: transparent !important;
    }
    
    ::-webkit-scrollbar { width: 6px; height: 6px; }
    ::-webkit-scrollbar-track { background: transparent; }
    ::-webkit-scrollbar-thumb { background: rgba(0,0,0,0.15); border-radius: 10px; }
    ::-webkit-scrollbar-thumb:hover { background: var(--main-primary); }
    [data-theme="dark"] ::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.2); }
    
    #sidebar .sidebar-header { padding: 25px 20px; border-bottom: 1px solid var(--sidebar-border); text-align: center; }
    
    .sidebar-menu { padding: 15px 0; list-style: none; margin: 0; }
    .sidebar-menu li { padding: 4px 15px; }
    .sidebar-menu a.menu-item {
        color: var(--sidebar-text); text-decoration: none; display: flex; align-items: center;
        padding: 12px 15px; border-radius: 12px; transition: 0.3s; font-weight: 500;
    }
    .sidebar-menu a.menu-item i { width: 30px; text-align: center; font-size: 1.1rem; }
    .sidebar-menu a.menu-item:hover, .sidebar-menu a.menu-item.active { 
        background: rgba(255,255,255,0.15); color: var(--sidebar-text-hover); box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    }
    
    .sub-menu { background: rgba(0,0,0,0.1); border-radius: 12px; margin: 5px 0; padding: 5px 0; overflow: hidden; }
    .sub-menu li { padding: 2px 10px; }
    .sub-menu a { 
        padding: 8px 15px 8px 40px; font-size: 0.9rem; color: var(--sidebar-text); 
        text-decoration: none; display: block; border-radius: 8px; transition: 0.2s; position: relative;
    }
    .sub-menu a::before {
        content: '\f105'; font-family: 'Font Awesome 5 Free'; font-weight: 900;
        position: absolute; left: 20px; font-size: 0.8rem; transition: 0.2s;
    }
    .sub-menu a:hover, .sub-menu a.sub-active { background: rgba(255,255,255,0.15); color: var(--sidebar-text-hover); font-weight: 600; }
    .sub-menu a.sub-active::before { color: var(--sidebar-text-hover); transform: translateX(3px); }
    
    .drop-icon { transition: transform 0.3s ease; font-size: 0.8rem; }
    .menu-item[aria-expanded="true"] .drop-icon { transform: rotate(180deg); }
    
    #content {
        width: calc(100% - 260px); margin-left: 260px;
        min-height: 100vh; transition: all 0.3s;
        display: flex; flex-direction: column;
    }
    
    /* Topbar Styles (Glass) */
    #topbar {
        background: var(--glass-bg); 
        backdrop-filter: blur(20px);
        border-bottom: 1px solid var(--glass-border);
        padding: 15px 25px; 
        position: sticky; top: 0; z-index: 1030; display: flex; align-items: center; justify-content: space-between;
    }

    @media (max-width: 768px) {
        #sidebar { margin-left: -260px; }
        #sidebar.active { margin-left: 0; }
        #content { width: 100%; margin-left: 0; }
        #topbar { padding: 12px 15px; }
        .sidebar-overlay {
            display: none; position: fixed; width: 100vw; height: 100vh;
            background: rgba(0, 0, 0, 0.4); z-index: 1035; top: 0; left: 0;
            backdrop-filter: blur(4px);
        }
        .sidebar-overlay.active { display: block; }
    }

    /* Loader & Calendar */
    #loader { display: none; position: fixed; top: 0; left: 0; width: 100vw; height: 100vh; background: var(--glass-bg); z-index: 9999; justify-content: center; align-items: center; display: flex; backdrop-filter: blur(10px); }
    .loader-hidden { display: none !important; }
    
    #calendar { padding: 15px; background: transparent; }
    .fc { font-family: 'Sarabun', sans-serif; color: var(--text-main); }
    .fc .fc-toolbar-title { font-size: 1.4rem; font-weight: 700; color: var(--text-main); }
    
    /* แก้ไขลิงก์ตัวหนังสือสีน้ำเงิน และพื้นหลังส่วนหัวปฏิทิน */
    .fc-col-header-cell-cushion { color: var(--text-muted) !important; text-decoration: none !important; font-weight: 600; }
    .fc-theme-standard th { padding: 10px 0; font-weight: 600; color: var(--text-muted); border: none; border-bottom: 1px solid var(--glass-border); background-color: transparent !important; }
    .fc-theme-standard td, .fc-theme-standard th { border-color: rgba(0,0,0,0.04); }
    .fc-scrollgrid { border: none !important; }
    
    .fc .fc-button-primary { background: var(--glass-bg); color: var(--text-main); border: 1px solid var(--glass-border); border-radius: 8px; box-shadow: 0 2px 4px rgba(0,0,0,0.02); text-transform: capitalize; transition: all 0.2s; font-weight: 500; }
    .fc .fc-button-primary:hover { background: var(--main-primary-light); color: var(--main-primary); border-color: var(--main-primary); }
    .fc .fc-button-primary:not(:disabled):active, .fc .fc-button-primary:not(:disabled).fc-button-active { background: var(--main-primary); color: #fff; border-color: var(--main-primary); box-shadow: 0 4px 10px rgba(79, 70, 229, 0.2); }
    .fc-daygrid-day-top { flex-direction: row; padding: 6px; justify-content: center; }
    .fc-daygrid-day-number { width: 32px; height: 32px; display: flex; align-items: center; justify-content: center; border-radius: 50%; color: var(--text-main); font-weight: 600; text-decoration: none; transition: 0.2s; font-size: 0.95rem; }
    .fc-daygrid-day-number:hover { background-color: var(--main-primary-light); color: var(--main-primary); }
    .fc-day-today .fc-daygrid-day-number { background-color: var(--main-primary) !important; color: #fff !important; box-shadow: 0 2px 6px rgba(79, 70, 229, 0.3); }
    .fc .fc-daygrid-day.fc-day-today { background-color: rgba(79, 70, 229, 0.03); }
    .fc-event { padding: 4px 8px; border-radius: 6px; font-size: 0.85rem; font-weight: 500; border: none !important; margin-bottom: 4px; cursor: pointer; transition: transform 0.2s, box-shadow 0.2s; box-shadow: 0 2px 4px rgba(0,0,0,0.05); }
    .fc-event:hover { transform: translateY(-1px); box-shadow: 0 4px 8px rgba(0,0,0,0.1); filter: brightness(1.05); z-index: 5; }
    .fc-daygrid-event-dot { display: none; }
    
    /* View Sections */
    .view-section { display: none; opacity: 0; transition: opacity 0.3s; animation: fadeIn 0.4s forwards; }
    .view-section.active { display: block; opacity: 1; }
    @keyframes fadeIn { from { opacity: 0; transform: translateY(15px); } to { opacity: 1; transform: translateY(0); } }
    
    /* Dropdowns & Modals */
    .modal-content {
        background: var(--glass-bg);
        backdrop-filter: blur(24px);
        border: 1px solid var(--glass-border);
        border-radius: 24px;
        box-shadow: 0 10px 40px rgba(0,0,0,0.1);
        color: var(--text-main);
    }
    
    .checkbox-menu { max-height: 250px; overflow-y: auto; display: none; position: absolute; background: rgba(255,255,255,0.9); backdrop-filter: blur(16px); width: 100%; border: 1px solid var(--glass-border); border-radius: 16px; z-index: 1000; box-shadow: 0 8px 24px rgba(0,0,0,0.1); padding: 8px; margin-top: 5px; }
    .checkbox-menu.show { display: block; }
    .checkbox-item { padding: 8px 12px; cursor: pointer; display: block; border-radius: 8px; transition: background 0.2s; color: var(--text-main); font-size: 0.95rem; margin-bottom: 2px;}
    .checkbox-item:hover { background-color: var(--main-primary-light); color: var(--main-primary); }
    .dropdown-toggle-btn { text-align: left; position: relative; border-radius: 50rem !important; }
    .dropdown-toggle-btn::after { position: absolute; right: 15px; top: 50%; transform: translateY(-50%); content: '\f078'; font-family: 'Font Awesome 5 Free'; font-weight: 900; font-size: 0.8rem; color: var(--text-muted); }
    
    /* Filters & Navigation */
    .nav-pills .nav-link { border-radius: 50px; color: var(--text-muted); background: transparent; margin-right: 8px; cursor: pointer; white-space: nowrap; padding: 8px 20px; transition: all 0.3s; border: 1px solid transparent;}
    .nav-pills .nav-link:hover { background-color: var(--input-bg); color: var(--text-main); }
    .nav-pills .nav-link.active { background: var(--main-primary); color: white !important; font-weight: 600; box-shadow: 0 4px 10px var(--main-primary-light); border-color: var(--main-primary);}

    .text-truncate-2 { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
    
    /* --- Glass Tables --- */
    .table-glass { background: transparent; margin-bottom: 0; }
    .table-glass thead th { border: none; color: var(--text-muted); font-weight: 600; font-size: 0.9rem; padding: 15px 16px; text-transform: uppercase; letter-spacing: 0.5px; background: rgba(0,0,0,0.02); border-bottom: 1px solid var(--glass-border); }
    .table-glass tbody tr { background-color: transparent; transition: all 0.2s; border-bottom: 1px solid rgba(0,0,0,0.05); }
    .table-glass tbody tr:hover { background-color: var(--table-hover); transform: translateY(-1px); box-shadow: 0 4px 8px rgba(0,0,0,0.02); }
    .table-glass td { border: none; padding: 16px; vertical-align: middle; color: var(--text-main); }

    /* Stats Badges */
    .stat-pill { display: inline-flex; align-items: center; padding: 6px 12px; border-radius: 8px; margin-right: 8px; font-size: 0.85rem; font-weight: 600; min-width: 90px; justify-content: center; box-shadow: 0 2px 5px rgba(0,0,0,0.02); border: 1px solid transparent; }
    .stat-pill i { margin-right: 6px; font-size: 0.9rem; }
    .stat-success { background-color: rgba(16, 185, 129, 0.15); color: #047857; border-color: rgba(16, 185, 129, 0.3); }
    .stat-late { background-color: rgba(245, 158, 11, 0.15); color: #b45309; border-color: rgba(245, 158, 11, 0.3); }
    .stat-pending { background-color: rgba(239, 68, 68, 0.15); color: #b91c1c; border-color: rgba(239, 68, 68, 0.3); }
    .stat-notify-done { background-color: rgba(14, 165, 233, 0.15); color: #0369a1; border-color: rgba(14, 165, 233, 0.3); }
    .stat-notify-wait { background-color: rgba(107, 114, 128, 0.1); color: var(--text-muted); border-color: rgba(107, 114, 128, 0.2); }
    
    .pagination { justify-content: center; margin-top: 20px; }
    .page-item.active .page-link { background: var(--main-primary); border-color: var(--main-primary); color: white !important;}
    .page-link { color: var(--text-main); cursor: pointer; border-radius: 8px; margin: 0 4px; border: 1px solid var(--glass-border); background: var(--glass-bg); backdrop-filter: blur(5px);}
    .page-link:hover { background-color: var(--main-primary-light); color: var(--main-primary); }
    
    .progress { background-color: rgba(128,128,128,0.15); border-radius: 10px; overflow: hidden; }
    .progress-bar { background-color: var(--color-success); }
    
    /* Dashboard Chart Containers */
    .chart-container { position: relative; height: 220px; width: 100%; }
    .stat-card-glass { background: var(--glass-bg); backdrop-filter: blur(10px); border-radius: 16px; padding: 20px; text-align: center; border: 1px solid var(--glass-border); box-shadow: var(--glass-shadow); transition: transform 0.3s; }
    .stat-card-glass:hover { transform: translateY(-5px); }

    /* Button adjustments for modern feel */
    .btn-primary { background-color: var(--main-primary); border-color: var(--main-primary); color: white !important; }
    .btn-primary:hover { background-color: var(--main-primary-hover); border-color: var(--main-primary-hover); }
    .btn-outline-primary { color: var(--main-primary); border-color: var(--main-primary); }
    .btn-outline-primary:hover { background-color: var(--main-primary); color: white !important; }
    .text-primary { color: var(--main-primary) !important; }
    
    .btn-success { background-color: var(--color-success); border-color: var(--color-success); color: white !important; }
    .btn-warning { background-color: var(--color-warning); border-color: var(--color-warning); color: white !important; }
    .btn-danger { background-color: var(--color-danger); border-color: var(--color-danger); color: white !important; }
    .btn-info { background-color: var(--color-info); border-color: var(--color-info); color: white !important; }