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

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
            background: linear-gradient(135deg, #A7DB9A 0%, #DCF5D9 100%);
            min-height: 100vh;
            color: #102620;
            overflow-x: hidden;
        }

        .container {
            max-width: 100vw;
            margin: 0 auto;
            padding: 10px;
        }

        .header {
            background: #FF6421;
            color: white;
            padding: 15px 20px;
            border-radius: 8px;
            text-align: center;
            margin-bottom: 10px;
            box-shadow: 0 2px 8px rgba(255, 100, 33, 0.3);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .header-title {
            text-align: left;
        }

        .view-switcher {
            background: rgba(255, 255, 255, 0.2);
            padding: 4px;
            border-radius: 8px;
            display: flex;
            gap: 4px;
        }

        .view-btn {
            padding: 6px 16px;
            border: none;
            background: transparent;
            color: rgba(255, 255, 255, 0.8);
            border-radius: 6px;
            cursor: pointer;
            font-weight: 600;
            transition: all 0.3s ease;
        }

        .view-btn.active {
            background: white;
            color: #FF6421;
            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
        }

        /* 班级树视图 */
        .class-tree-view {
            display: none;
            height: calc(100vh - 130px);
            background: linear-gradient(to bottom, #87CEEB 0%, #E0F7FA 60%, #90EE90 60%, #228B22 100%);
            border-radius: 8px;
            position: relative;
            overflow: hidden;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        }

        .class-tree-view.active {
            display: block;
        }

        .tree-container {
            position: absolute;
            bottom: 10%;
            left: 50%;
            transform: translateX(-50%);
            width: 60%;
            max-width: 600px;
            display: flex;
            flex-direction: column;
            align-items: center;
        }

        .big-tree-img {
            width: 100%;
            height: auto;
            filter: drop-shadow(0 10px 20px rgba(0, 0, 0, 0.2));
            transition: transform 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.27);
        }

        .class-info-panel {
            position: absolute;
            top: 20px;
            right: 20px;
            background: rgba(255, 255, 255, 0.9);
            padding: 15px 25px;
            border-radius: 12px;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
            backdrop-filter: blur(5px);
            text-align: center;
            min-width: 200px;
        }

        .class-level-badge {
            background: #FFDE5E;
            color: #004737;
            font-weight: bold;
            padding: 4px 12px;
            border-radius: 20px;
            display: inline-block;
            margin-bottom: 8px;
            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
        }

        .class-exp-bar {
            width: 100%;
            height: 12px;
            background: #e0e0e0;
            border-radius: 6px;
            overflow: hidden;
            margin-top: 8px;
        }

        .class-exp-fill {
            height: 100%;
            background: linear-gradient(90deg, #A7DB9A, #228B22);
            width: 0%;
            transition: width 0.5s ease;
        }

        /* 能量球动画 */
        .energy-bubble {
            position: absolute;
            width: 60px;
            height: 60px;
            background: rgba(255, 255, 255, 0.9);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #FF6421;
            font-weight: bold;
            font-size: 18px;
            box-shadow: 0 4px 10px rgba(255, 100, 33, 0.3);
            pointer-events: none;
            animation: floatUp 2s ease-out forwards;
            z-index: 100;
        }

        @keyframes floatUp {
            0% {
                transform: translateY(0) scale(0.5);
                opacity: 0;
            }

            20% {
                transform: translateY(-20px) scale(1.1);
                opacity: 1;
            }

            100% {
                transform: translateY(-150px) scale(1);
                opacity: 0;
            }
        }

        .main-content {
            display: grid;
            grid-template-columns: 300px 1fr;
            gap: 12px;
            margin-bottom: 10px;
            height: calc(100vh - 130px);
        }

        .mode-switch {
            display: flex;
            background: #e0e0e0;
            border-radius: 20px;
            padding: 4px;
            margin-bottom: 15px;
            position: relative;
        }

        .mode-option {
            flex: 1;
            text-align: center;
            padding: 8px;
            cursor: pointer;
            z-index: 1;
            font-weight: bold;
            color: #666;
            transition: color 0.3s;
        }

        .mode-option.active {
            color: #fff;
        }

        .mode-indicator {
            position: absolute;
            top: 4px;
            bottom: 4px;
            left: 4px;
            width: calc(50% - 4px);
            background: #4CAF50;
            border-radius: 16px;
            transition: transform 0.3s ease, background-color 0.3s;
        }

        /* 朗读模式下的指示器颜色 */
        .mode-switch[data-mode="read"] .mode-indicator {
            transform: translateX(100%);
            background: #FF9800;
        }

        .left-panel {
            background: #F8F9F7;
            border-radius: 8px;
            padding: 18px;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
            overflow-y: auto;
            display: flex;
            flex-direction: column;
            gap: 18px;
        }

        .right-panel {
            background: #F8F9F7;
            border-radius: 8px;
            padding: 15px;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
            overflow-y: auto;
        }

        .control-section {
            background: white;
            border-radius: 8px;
            padding: 16px;
            box-shadow: 0 1px 4px rgba(0, 0, 0, 0.05);
        }

        .control-section h3 {
            font-size: 16px;
            color: #004737;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 600;
        }

        .detection-controls {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .btn {
            padding: 10px 16px;
            border: none;
            border-radius: 6px;
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            text-align: center;
        }

        .btn-primary {
            background: #A7DB9A;
            color: #004737;
        }

        .btn-primary:hover {
            background: #AACA9F;
            transform: translateY(-1px);
            box-shadow: 0 2px 6px rgba(167, 219, 154, 0.4);
        }

        .btn-danger {
            background: #FF6421;
            color: white;
        }

        .btn-danger:hover {
            background: #FF9364;
            transform: translateY(-1px);
            box-shadow: 0 2px 6px rgba(255, 100, 33, 0.4);
        }

        .btn-warning {
            background: #FFDE5E;
            color: #102620;
        }

        .btn-warning:hover {
            background: #FFE98F;
            transform: translateY(-1px);
            box-shadow: 0 2px 6px rgba(255, 222, 94, 0.4);
        }

        .btn-info {
            background: #C4DAFB;
            color: #102620;
        }

        .btn-info:hover {
            background: #D4E4FB;
            transform: translateY(-1px);
            box-shadow: 0 2px 6px rgba(196, 218, 251, 0.4);
        }

        .volume-meter {
            text-align: center;
        }

        .volume-display {
            font-size: 24px;
            font-weight: bold;
            color: #004737;
            margin-bottom: 10px;
        }

        .volume-bar {
            width: 100%;
            height: 18px;
            background: #e0e0e0;
            border-radius: 10px;
            overflow: hidden;
            margin: 10px 0;
            box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.1);
        }

        .volume-fill {
            height: 100%;
            background: linear-gradient(90deg, #A7DB9A 0%, #FFDE5E 50%, #FF6421 100%);
            width: 0%;
            transition: width 0.3s ease;
            border-radius: 10px;
        }

        .status-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 10px;
        }

        .status-item {
            background: white;
            padding: 12px;
            border-radius: 8px;
            text-align: center;
            border-left: 4px solid #A7DB9A;
            box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
        }

        .status-value {
            font-size: 18px;
            font-weight: bold;
            color: #004737;
            margin-bottom: 4px;
        }

        .status-label {
            font-size: 12px;
            color: #636D6A;
            font-weight: 500;
        }

        .progress-section {
            background: white;
            border-radius: 8px;
            padding: 16px;
            box-shadow: 0 1px 4px rgba(0, 0, 0, 0.05);
        }

        .progress-section h4 {
            font-size: 16px;
            color: #004737;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 600;
        }

        .progress-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 10px;
            padding: 8px 12px;
            background: #DCF5D9;
            border-radius: 6px;
        }

        .progress-item:last-child {
            margin-bottom: 0;
        }

        .progress-label {
            font-weight: 600;
            color: #004737;
            font-size: 14px;
        }

        .progress-value {
            font-size: 18px;
            font-weight: bold;
            color: #FF6421;
        }

        .system-selector {
            background: white;
            border-radius: 8px;
            padding: 16px;
            box-shadow: 0 1px 4px rgba(0, 0, 0, 0.05);
        }

        .system-selector h4 {
            font-size: 16px;
            color: #004737;
            margin-bottom: 12px;
            font-weight: 600;
        }

        .system-selector select {
            width: 100%;
            padding: 10px 12px;
            border: 2px solid #DCF5D9;
            border-radius: 6px;
            font-size: 14px;
            background: white;
            color: #102620;
            cursor: pointer;
        }

        .system-selector select:focus {
            outline: none;
            border-color: #A7DB9A;
            box-shadow: 0 0 0 3px rgba(167, 219, 154, 0.1);
        }

        .toolbar {
            display: flex;
            gap: 8px;
            margin-bottom: 12px;
            flex-wrap: wrap;
            align-items: center;
        }

        .seat-layout-controls {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .checkbox-container {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .checkbox-container input[type="checkbox"] {
            width: 16px;
            height: 16px;
            cursor: pointer;
        }

        .checkbox-container label {
            font-size: 14px;
            cursor: pointer;
            color: #102620;
        }

        .students-grid {
            display: grid;
            gap: 4px;
            padding: 12px;
            background: white;
            border-radius: 8px;
            height: calc(100vh - 220px);
            overflow-y: auto;
            box-shadow: 0 1px 4px rgba(0, 0, 0, 0.05);
        }

        .student-card {
            background: #f9f9f9;
            border-radius: 8px;
            padding: 8px 24px;
            /* 增加左右内边距，为按钮留出空间 */
            text-align: center;
            cursor: pointer;
            transition: all 0.3s ease;
            border: 2px solid transparent;
            position: relative;
            min-height: 110px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            align-items: center;
            overflow: hidden;
        }

        .student-card:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            background: #fff;
        }

        /* 左右侧加减分按钮 */
        .side-btn {
            position: absolute;
            top: 0;
            bottom: 0;
            width: 24px;
            border: none;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            font-weight: bold;
            color: white;
            opacity: 0;
            transition: all 0.2s ease;
            z-index: 5;
        }

        .student-card:hover .side-btn {
            opacity: 0.6;
        }

        .side-btn:hover {
            opacity: 1 !important;
            width: 28px;
        }

        .btn-left-sub {
            left: 0;
            background: linear-gradient(90deg, rgba(255, 100, 33, 0.8), rgba(255, 100, 33, 0));
            border-top-left-radius: 6px;
            border-bottom-left-radius: 6px;
        }

        .btn-right-add {
            right: 0;
            background: linear-gradient(-90deg, rgba(167, 219, 154, 0.9), rgba(167, 219, 154, 0));
            border-top-right-radius: 6px;
            border-bottom-right-radius: 6px;
            color: #004737;
        }

        .tree-image {
            width: 60px;
            height: 60px;
            object-fit: contain;
            margin-bottom: 4px;
            transition: transform 0.3s ease;
        }

        .student-card:hover .tree-image {
            transform: scale(1.1);
        }

        .level-badge {
            position: absolute;
            top: 4px;
            right: 4px;
            background: #FFDE5E;
            color: #004737;
            font-size: 10px;
            font-weight: bold;
            padding: 2px 6px;
            border-radius: 10px;
            box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
        }

        .exp-bar-container {
            width: 100%;
            height: 6px;
            background: #e0e0e0;
            border-radius: 3px;
            overflow: hidden;
            margin-top: 4px;
        }

        .exp-bar-fill {
            height: 100%;
            background: linear-gradient(90deg, #A7DB9A, #004737);
            width: 0%;
            transition: width 0.3s ease;
            border-radius: 3px;
        }

        .student-card.selected {
            border-color: #FFDE5E;
            background: #FFFBF0;
            box-shadow: 0 2px 8px rgba(255, 222, 94, 0.3);
        }

        .student-card.highlighted {
            border-color: #FF6421;
            background: #FFF5F0;
            animation: pulse 1s infinite;
            box-shadow: 0 4px 12px rgba(255, 100, 33, 0.4);
        }

        .student-card.dragging {
            opacity: 0.6;
            transform: rotate(3deg) scale(0.95);
            z-index: 1000;
        }

        .student-card.drag-over {
            border-color: #A7DB9A;
            background: #F0FFF0;
            transform: scale(1.02);
        }

        @keyframes pulse {

            0%,
            100% {
                transform: scale(1);
            }

            50% {
                transform: scale(1.05);
            }
        }

        .student-name {
            font-weight: 600;
            margin-bottom: 1px;
            font-size: 12px;
            line-height: 1.2;
            color: #102620;
        }

        .student-exp-text {
            font-size: 10px;
            color: #636D6A;
            margin-bottom: 2px;
        }

        .student-resources {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 6px;
            margin-bottom: 3px;
        }

        .resource-item {
            display: flex;
            align-items: center;
            font-size: 10px;
            gap: 2px;
            color: #636D6A;
            font-weight: 500;
        }

        .resource-icon {
            font-size: 12px;
        }

        .student-controls {
            display: none;
            /* 隐藏旧的控制按钮 */
        }

        .control-btn {
            width: 18px;
            height: 18px;
            border: none;
            border-radius: 50%;
            font-size: 10px;
            font-weight: bold;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.2s ease;
        }

        .control-btn:hover {
            transform: scale(1.1);
        }

        .btn-add {
            background: #A7DB9A;
            color: #004737;
        }

        .btn-subtract {
            background: #FF6421;
            color: white;
        }

        .modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.5);
            z-index: 1000;
            backdrop-filter: blur(2px);
        }

        .modal-content {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            background: white;
            padding: 24px;
            border-radius: 12px;
            max-width: 500px;
            width: 90%;
            max-height: 80vh;
            overflow-y: auto;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
        }

        .modal-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 20px;
            padding-bottom: 12px;
            border-bottom: 2px solid #DCF5D9;
        }

        .modal-title {
            font-size: 20px;
            font-weight: 600;
            color: #004737;
        }

        .close-btn {
            background: none;
            border: none;
            font-size: 24px;
            cursor: pointer;
            color: #636D6A;
            padding: 4px;
            border-radius: 4px;
            transition: all 0.2s ease;
        }

        .close-btn:hover {
            background: #f0f0f0;
            color: #102620;
        }

        .rules-list {
            list-style: none;
            padding: 0;
        }

        .rules-list li {
            padding: 12px 0;
            border-bottom: 1px solid #DCF5D9;
            font-size: 14px;
            line-height: 1.5;
            color: #102620;
        }

        .rules-list li:last-child {
            border-bottom: none;
        }

        .setting-item {
            margin-bottom: 16px;
        }

        .setting-item label {
            display: block;
            font-weight: 600;
            margin-bottom: 6px;
            color: #004737;
            font-size: 14px;
        }

        .setting-item input,
        .setting-item select {
            width: 100%;
            padding: 10px 12px;
            border: 2px solid #DCF5D9;
            border-radius: 6px;
            font-size: 14px;
            background: white;
        }

        .setting-item input:focus,
        .setting-item select:focus {
            outline: none;
            border-color: #A7DB9A;
            box-shadow: 0 0 0 3px rgba(167, 219, 154, 0.1);
        }

        .sensitivity-guide {
            background: #DCF5D9;
            padding: 12px;
            border-radius: 6px;
            margin-top: 8px;
            font-size: 12px;
            line-height: 1.4;
            color: #004737;
        }

        .notification {
            position: fixed;
            top: 20px;
            right: 20px;
            padding: 12px 16px;
            border-radius: 8px;
            color: white;
            font-weight: 600;
            z-index: 1001;
            transform: translateX(100%);
            transition: transform 0.3s ease;
            font-size: 14px;
            max-width: 350px;
            word-wrap: break-word;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
        }

        .notification.show {
            transform: translateX(0);
        }

        .notification.success {
            background: #A7DB9A;
            color: #004737;
        }

        .notification.warning {
            background: #FF6421;
        }

        .notification.error {
            background: #dc3545;
        }

        /* 排行榜样式 */
        .leaderboard-item {
            display: flex;
            align-items: center;
            padding: 8px;
            border-bottom: 1px solid #f0f0f0;
            gap: 10px;
        }

        .leaderboard-item:last-child {
            border-bottom: none;
        }

        .rank {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: #eee;
            color: #666;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            font-size: 12px;
            flex-shrink: 0;
        }

        .rank-1 {
            background: #FFD700;
            color: #fff;
            box-shadow: 0 2px 4px rgba(255, 215, 0, 0.3);
        }

        .rank-2 {
            background: #C0C0C0;
            color: #fff;
        }

        .rank-3 {
            background: #CD7F32;
            color: #fff;
        }

        .rank-info {
            flex: 1;
            overflow: hidden;
        }

        .rank-name {
            font-size: 13px;
            font-weight: 600;
            color: #004737;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .rank-level {
            font-size: 11px;
            color: #666;
        }

        .rank-img {
            width: 28px;
            height: 28px;
            object-fit: contain;
        }

        .fullscreen-alert {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
            z-index: 2000;
            opacity: 0;
            transition: opacity 0.3s ease;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 48px;
            font-weight: bold;
            color: white;
            text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
        }

        .fullscreen-alert.red {
            background: rgba(255, 68, 68, 0.6);
            opacity: 1;
        }

        .fullscreen-alert.green {
            background: rgba(76, 175, 80, 0.6);
            opacity: 1;
        }

        .edit-btn {
            background: none;
            border: none;
            cursor: pointer;
            font-size: 14px;
            opacity: 0.6;
            transition: opacity 0.2s;
            padding: 0 4px;
        }

        .edit-btn:hover {
            opacity: 1;
        }

        .btn-save {
            flex: 1;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            border: none;
            padding: 12px;
            border-radius: 12px;
            font-weight: bold;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 4px 15px rgba(118, 75, 162, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 15px;
        }

        .btn-save:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(118, 75, 162, 0.4);
        }

        .btn-save:active {
            transform: translateY(0);
        }

        .btn-export {
            width: 46px;
            background: #f0f2f5;
            border: 2px solid #e4e6eb;
            border-radius: 12px;
            cursor: pointer;
            font-size: 20px;
            transition: all 0.3s ease;
            color: #666;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .btn-export:hover {
            background: #fff;
            border-color: #667eea;
            color: #667eea;
            transform: translateY(-2px);
        }

        /* 减分动画 */
        @keyframes shakeRed {

            0%,
            100% {
                transform: translateX(0);
                border-color: #eee;
            }

            20%,
            60% {
                transform: translateX(-5px);
                border-color: #ff4444;
                background-color: #fff0f0;
            }

            40%,
            80% {
                transform: translateX(5px);
                border-color: #ff4444;
                background-color: #fff0f0;
            }
        }

        .shake-red {
            animation: shakeRed 0.5s ease-in-out;
        }

        .exp-float-minus {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            color: #ff4444;
            font-weight: bold;
            font-size: 24px;
            text-shadow: 0 1px 2px rgba(255, 255, 255, 0.8);
            pointer-events: none;
            animation: floatUpFade 1s ease-out forwards;
            z-index: 10;
        }

        /* 响应式设计 */
        @media (max-width: 1200px) {
            .main-content {
                grid-template-columns: 280px 1fr;
            }
        }

        @media (max-width: 768px) {
            .main-content {
                grid-template-columns: 1fr;
                height: auto;
            }

            .left-panel {
                order: 2;
                height: auto;
            }

            .right-panel {
                order: 1;
            }

            .students-grid {
                height: 60vh;
            }
        }

        /* 滚动条样式 */
        ::-webkit-scrollbar {
            width: 6px;
        }

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

        ::-webkit-scrollbar-thumb {
            background: #A7DB9A;
            border-radius: 3px;
        }

        ::-webkit-scrollbar-thumb:hover {
            background: #AACA9F;
        }

        /* 数字键盘样式 */
        .numpad-container {
            padding: 10px;
        }

        .numpad-display {
            margin-bottom: 20px;
        }

        .numpad-display input {
            width: 100%;
            height: 54px;
            font-size: 28px;
            text-align: center;
            border: 2px solid #A7DB9A;
            border-radius: 12px;
            background: #f9f9f9;
            color: #004737;
            font-weight: bold;
            box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.05);
        }

        .numpad-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 12px;
        }

        .num-btn {
            height: 64px;
            font-size: 22px;
            font-weight: bold;
            border: none;
            background: #fff;
            border-radius: 12px;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
            cursor: pointer;
            transition: all 0.2s ease;
            color: #004737;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .num-btn:active {
            background: #A7DB9A;
            color: white;
            transform: scale(0.95);
            box-shadow: 0 1px 4px rgba(0, 0, 0, 0.1);
        }

        .num-btn.clear {
            color: #FF6421;
            font-size: 16px;
        }

        .num-btn.delete {
            font-size: 20px;
        }

        .btn-export {
            display: flex;
            align-items: center;
            gap: 4px;
            padding: 8px 16px;
            background: #4CAF50;
            color: white;
            border: none;
            border-radius: 8px;
            cursor: pointer;
            font-weight: 600;
            transition: all 0.3s ease;
        }

        .btn-export:hover {
            background: #45a049;
            transform: translateY(-1px);
        }

        .btn-secondary {
            background: #607D8B;
            color: white;
        }

        .btn-secondary:hover {
            background: #546E7A;
        }