/* body {
            font-family: Arial, Helvetica, sans-serif;
            margin: 0;
            padding: 20px;
            background: #f5f7fa;
            color: #333;
        } */

        #calendar-container {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 20px;
            max-width: 100%;
            margin: 0 auto;
            overflow: hidden;
        }
        
        @media only screen and (max-width: 767px) {
			#calendar-container {
		    	grid-template-columns: 1fr;
		    	gap: 15px;
		    	padding: 0;
		  	}
		}

        #calendar {
            background: #fff;
            border-radius: 12px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            padding: 20px;
            max-width: 100%;
            overflow: hidden;
        }

        #events {
            background: #fff;
            border-radius: 12px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            padding: 20px;
            max-width: 100%;
            overflow: hidden;
        }

        .header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 15px;
            flex-wrap: wrap;
        }

        .header h1 {
            margin: 0;
            font-size: 20px;
            font-weight: bold;
            color: #1e40af;
        }
        .nav-month{
           color: #fb5004; 
        }
        .nav-btn {
            border: none;
            border-radius: 10px;
            /* cursor: pointer; */
            font-size: 20px;
            width: auto;
            
        }

        .nav-btn:hover {
            background: #d1d5db;
        }

        .month {
            display: grid;
            grid-template-columns: repeat(7, 1fr);
            gap: 20px;
            width: 100%;
        }

		.day {
			/* max-height: 90px; */
			/* background: #f9fafb; */
			border-radius: 8px;
			/* padding: 10px; */
			text-align: center;
			cursor: pointer;
			transition: all 0.2s ease;
			color: #3e3e3e;
			display: flex;
			flex-direction: column;
			align-items: center;
			justify-content: flex-start;
			flex-wrap: nowrap;
		    height: auto;
		  }

		.day.other {
			color: #9ca3af;
			/* background: #f3f4f6; */
		}
		
		.day.today {
            background: #eff6ff;
            color: #2563eb;
            font-weight: bold;
        }

        .day:hover {
            background: #e0f2fe;
        }

        .day-name {
            font-size: 14px;
            color: #333333;
            /* margin-bottom: 6px; */
            text-transform: uppercase;
        }

        .day-number {
            font-size: 16px;
            font-weight: 500;
        }

        /* .day-events {
            margin-top: 6px;
        } */

        .day-events span {
            display: inline-block;
            width: 6px;
            height: 6px;
            border-radius: 50%;
            margin: 0 2px;
        }

        .event-card {
            border: none;
            border-radius: 10px;
            margin-bottom: 15px;
            padding: 15px;
            box-shadow: 0 2px 4px rgba(0,0,0,0.1);
            transition: transform 0.2s;
        }
        .event-card:hover {
            transform: translateY(-2px);
        }
        .event-location {
            font-size: 0.9em;
            color: #6c757d;
            margin-bottom: 5px;
        }
        .event-date {
            font-size: 0.85em;
            color: var(--bs-primary);
            margin-bottom: 8px;
        }
        .event-title {
            font-weight: 600;
            color: #134686;
            margin-bottom: 5px;
        }
        .event-description {
            font-size: 0.9em;
            color: #6c757d;
            line-height: 1.4;
        }

        .blue {
            color: #134686;
        }

        .orange {
            color: #ED3F27;
        }

        .yellow {
            color: #FEB21A;
        }



        /* Danh sách sự kiện bên phải */
        #events h2 {
            margin: 0 0 15px;
            font-size: 24px;
            color: #ED3F27;
            text-align: center;
        }

        #event-list {
            max-height: 500px;
            overflow-y: auto;
            padding-right: 10px;
        }

        #event-list::-webkit-scrollbar {
            width: 6px;
        }

        #event-list::-webkit-scrollbar-track {
            background: #f1f1f1;
            border-radius: 3px;
        }

        #event-list::-webkit-scrollbar-thumb {
            background: #c1c1c1;
            border-radius: 3px;
        }

        #event-list::-webkit-scrollbar-thumb:hover {
            background: #a8a8a8;
        }

        .event {
            padding: 10px 0;
            border-bottom: 1px solid #e5e7eb;
            font-size: 14px;
        }

        .event:last-child {
            border-bottom: none;
        }

        .event-category {
            display: inline-block;
            width: 10px;
            height: 10px;
            border-radius: 50%;
            margin-right: 8px;
        }

        .legend {
            margin-top: 15px;
            display: flex;
            gap: 15px;
            flex-wrap: wrap;
        }

		.entry {
		    font-size: 13px;
		    display: flex;
		    align-items: center;
		    gap: 6px;
		    
		    /* BỔ SUNG ĐỂ TẠO VIỀN TRÒN */
		    /* border: 1px solid #ccc; */ /* Thêm viền để thấy rõ hiệu ứng */
		    padding: 4px 6px;      /* Thêm đệm để nội dung không chạm sát viền */
		    border-radius: 4px;     /* Làm tròn các góc 8px */
		}

/*         .entry:before {
            content: "";
            display: inline-block;
            width: 10px;
            height: 10px;
            border-radius: 50%;
        }
 */
        .entry.blue:before {
            background: #134686 ;
        }

        .entry.orange:before {
            background: #ED3F27;
        }

        .entry.yellow:before {
            background: #FEB21A;
        }
         .entry.blue {
            background:#0775ff45 ;
        }

        .entry.orange {
            background:#ff3b1d38;
        }

        .entry.yellow {
            background: rgb(255, 255, 208);
        }

        .filter-btn {
            min-width: max-content;
            padding: 6px 12px;
            border-radius: 15px;
            cursor: pointer;
            font-size: 12px;
            font-weight: 500;
            transition: all 0.3s ease;
            border: 2px solid;
        }

        .filter-btn:hover {
            transform: translateY(-1px);
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
        }

        .filter-btn[data-filter-id="all"]:hover {
            background: #6c757d !important;
            color: #fff !important;
        }

        .filter-btn[data-filter-id="domestic"]:hover {
            background: #134686 !important;
            color: #fff !important;
        }

        .filter-btn[data-filter-id="international"]:hover {
            background: #ED3F27 !important;
            color: #fff !important;
        }

        /* Active state styles */
        .filter-btn.active {
            transform: translateY(-1px);
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
        }
		
		.text-truncate-custom {
			max-width: 80px;
			white-space: nowrap;
			overflow: hidden;
			text-overflow: ellipsis;
		}

        /* ========================================
           MOBILE RESPONSIVE CSS
           ======================================== */
        
        /* Tablet - Small screens */
        @media only screen and (max-width: 991px) {
            #calendar-container {
                grid-template-columns: 1fr;
                gap: 15px;
            }
            
            #calendar, #events {
                padding: 15px;
            }
            
            .header h1 {
                font-size: 18px;
            }
            
            .month {
                gap: 12px;
            }
        }

        /* Mobile - Extra small screens */
        @media only screen and (max-width: 576px) {
            #calendar-container {
                padding: 0 5px;
            }
            
            #calendar, #events {
                padding: 10px;
                border-radius: 8px;
                box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
            }
            
            .header {
                gap: 8px;
                margin-bottom: 10px;
            }
            
            .header h1 {
                font-size: 15px;
                flex: 1 0 100%;
                text-align: center;
                margin-bottom: 5px;
            }
            
            .nav-month {
                font-size: 13px;
            }
            
            .nav-btn {
                font-size: 14px;
                padding: 4px 8px;
                min-width: 40px;
            }
            
            .month {
                gap: 4px;
            }
            
            .day {
                height: auto;
                min-height: 38px;
                padding: 4px 2px;
                border-radius: 4px;
            }
            
            .day-name {
                font-size: 10px;
                margin-bottom: 1px;
            }
            
            .day-number {
                font-size: 12px;
            }
            
            .day-events span {
                width: 3px;
                height: 3px;
                margin: 0 1px;
            }
            
            /* Events section */
            #events h2 {
                font-size: 16px;
                margin-bottom: 10px;
            }
            
            #event-list {
                max-height: 350px;
                padding-right: 5px;
            }
            
            .event {
                padding: 8px 0;
                font-size: 12px;
            }
            
            .event-card {
                padding: 10px;
                margin-bottom: 10px;
                border-radius: 6px;
            }
            
            .event-location {
                font-size: 0.8em;
            }
            
            .event-date {
                font-size: 0.75em;
            }
            
            .event-title {
                font-size: 0.9em;
            }
            
            .event-description {
                font-size: 0.8em;
            }
            
            /* Legend */
            .legend {
                gap: 8px;
                margin-top: 10px;
            }
            
            .entry {
                font-size: 10px;
            }
            
            .entry:before {
                width: 7px;
                height: 7px;
            }
            
            /* Filter buttons */
            .filter-btn {
                padding: 4px 8px;
                font-size: 10px;
                border-radius: 10px;
            }
            
            .text-truncate-custom {
                max-width: 100px;
            }
            
            /* Disable hover effects on mobile */
            .day:hover {
                background: inherit;
            }
            
            .day.today:hover {
                background: #eff6ff;
            }
            
            .filter-btn:hover {
                transform: none;
            }
            
            .event-card:hover {
                transform: none;
            }
        }

        /* Very small mobile devices */
        @media only screen and (max-width: 380px) {
            #calendar-container {
                padding: 0 2px;
            }
            
            #calendar, #events {
                padding: 8px;
            }
            
            .month {
                gap: 2px;
            }
            
            .day {
                min-height: 35px;
                padding: 3px 1px;
            }
            
            .day-name {
                font-size: 9px;
            }
            
            .day-number {
                font-size: 11px;
            }
            
            .header h1 {
                font-size: 13px;
            }
            
            .nav-btn {
                font-size: 12px;
                padding: 3px 6px;
                min-width: 35px;
            }
            
            #events h2 {
                font-size: 14px;
            }
            
            .event-card {
                padding: 8px;
            }
            
            .filter-btn {
                padding: 3px 6px;
                font-size: 9px;
            }
            
            .text-truncate-custom {
                max-width: 70px;
            }
        }

        /* Landscape orientation on mobile */
        @media only screen and (max-width: 767px) and (orientation: landscape) {
            #calendar-container {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            
            .day {
                min-height: 35px;
            }
            
            #event-list {
                max-height: 250px;
            }
        }

        /* Touch device optimizations */
        @media (hover: none) and (pointer: coarse) {
            .day, .nav-btn, .filter-btn, .event-card {
                -webkit-tap-highlight-color: rgba(0, 0, 0, 0.1);
                touch-action: manipulation;
            }
            
            .day {
                min-height: 44px;
            }
            
            .nav-btn {
                min-width: 44px;
                min-height: 44px;
            }
            
            .filter-btn {
                min-height: 36px;
            }
        }