/* 自定义样式 */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

/* 自定义滚动条 */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background-color: rgba(148, 163, 184, 0.4);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background-color: rgba(148, 163, 184, 0.7);
}

/* 高级玻璃拟态效果 */
.glass-panel {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.6);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.05);
}
.glass-panel-dark {
    background: rgba(15, 23, 42, 0.7);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
}

/* 高级阴影与悬浮动效 */
.hover-card-up {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.hover-card-up:hover {
    transform: translateY(-4px) scale(1.01);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}
.hover-glow {
    transition: all 0.3s ease;
}
.hover-glow:hover {
    box-shadow: 0 0 20px rgba(59, 130, 246, 0.4);
}

/* 文本渐变发光 */
.text-gradient-glow {
    background-clip: text;
    -webkit-background-clip: text;
    color: transparent;
    text-shadow: 0 0 20px rgba(255, 255, 255, 0.3);
}

/* 渐变动画边框 */
.animated-border {
    position: relative;
    border-radius: inherit;
}
.animated-border::before {
    content: "";
    position: absolute;
    inset: -2px;
    border-radius: inherit;
    background: linear-gradient(45deg, #3b82f6, #8b5cf6, #ec4899, #3b82f6);
    background-size: 200% 200%;
    animation: gradient-move 3s linear infinite;
    z-index: -1;
    opacity: 0;
    transition: opacity 0.3s ease;
}
.animated-border:hover::before {
    opacity: 1;
}
@keyframes gradient-move {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* 背景流动网格 */
.bg-grid-pattern {
    background-size: 40px 40px;
    background-image: linear-gradient(to right, rgba(0, 0, 0, 0.05) 1px, transparent 1px),
                      linear-gradient(to bottom, rgba(0, 0, 0, 0.05) 1px, transparent 1px);
}
.bg-grid-pattern-dark {
    background-size: 40px 40px;
    background-image: linear-gradient(to right, rgba(255, 255, 255, 0.05) 1px, transparent 1px),
                      linear-gradient(to bottom, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
}

/* 通用过渡动画 */
.transition-all-200 {
    transition: all 0.2s ease-in-out;
}
.transition-all-300 {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 拖拽排序 */
.question-item {
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.question-item[draggable="true"]:hover {
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}
.question-item.dragging {
    opacity: 0.5;
}
.drag-handle {
    font-size: 18px;
    line-height: 1;
    user-select: none;
}
.drag-handle:active {
    cursor: grabbing;
}

/* 选项选中高亮 */
.option-label:has(input:checked) {
    border-color: #3b82f6;
    background-color: #eff6ff;
}

/* 计时器闪烁 */
@keyframes timer-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}
.animate-pulse {
    animation: timer-pulse 1s ease-in-out infinite;
}

/* 题号导航按钮 */
#nav-panel button,
#nav-panel-mobile button {
    transition: all 0.15s ease;
}

/* 进度条动画 */
#progress-bar {
    transition: width 0.3s ease;
}

/* 批改页面底部栏 */
.sticky.bottom-4 {
    backdrop-filter: blur(8px);
    background-color: rgba(255,255,255,0.95);
}

/* 提交列表左侧颜色条 */
.border-l-4.border-l-green-400 {
    border-left: 4px solid #4ade80;
}
.border-l-4.border-l-yellow-400 {
    border-left: 4px solid #facc15;
}

/* 快速给分按钮 */
button[onclick^="quickScore"] {
    transition: all 0.1s ease;
}
button[onclick^="quickScore"]:active {
    transform: scale(0.95);
}

/* 响应式优化 */
@media (max-width: 640px) {
    .sticky.top-0 {
        position: sticky;
        top: 0;
    }
    #nav-panel-mobile {
        max-height: 120px;
        overflow-y: auto;
    }
}