/**
 * 学生成绩分析系统 - 表格组件样式
 */

/* 数据表格 - 现代化设计 */
.data-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1rem;
    font-size: 14px;
}

.data-table th {
    padding: 16px 20px;
    text-align: left;
    font-weight: 600;
    color: var(--text-secondary);
    border-bottom: 2px solid var(--border-color-light);
    background: white; /* 纯白背景 */
    text-transform: uppercase; /* 全大写 */
    letter-spacing: 0.5px; /* 增加字间距 */
    font-size: 12px; /* 稍小的字号 */
    position: sticky;
    top: 0;
}

.data-table td {
    padding: 16px 20px; /* 增加内边距 */
    text-align: left;
    border-bottom: 1px solid #F1F5F9; /* 极淡的分隔线 */
    color: var(--text-primary);
    transition: background-color 0.2s;
    vertical-align: middle;
}

/* 斑马纹改为悬停高亮，更显高级 */
.data-table tbody tr {
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.data-table tbody tr:hover {
    background-color: #F7FAFC;
    transform: scale(1.005); /* 微弱的放大效果 */
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
    z-index: 1;
    position: relative;
}

/* 数字列采用等宽字体，便于对齐 */
.data-table td.numeric,
.data-table td:nth-child(n+3) { /* 假设第3列开始是数值 */
    font-variant-numeric: tabular-nums;
}

/* 成绩等级徽章 */
.grade-badge {
    display: inline-flex;
    align-items: center;
    justify-content: flex-start;
    font-weight: 500;
    font-size: 14px;
    color: #000000;
    background: transparent;
    border: none;
    box-shadow: none;
    width: auto;
    height: auto;
    padding: 0;
    border-radius: 0;
}

.grade-badge.grade-a,
.grade-badge.grade-b,
.grade-badge.grade-c,
.grade-badge.grade-d,
.grade-badge.grade-e,
.grade-badge.grade-absent {
    background: transparent;
    color: #000000;
}

/* 排名展示 */
.rank-badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 10px;
    border-radius: 20px;
    font-weight: 600;
    font-size: 13px;
    background: #f1f5f9;
    color: #475569;
}

.rank-badge.top-3 {
    background: #FEF3C7;
    color: #92400E;
    border: 1px solid #FCD34D;
}

.rank-badge.top-1 {
    background: #FFFBEB;
    color: #D97706;
    border: 1px solid #FCD34D;
    box-shadow: 0 0 10px rgba(251, 191, 36, 0.2);
}

/* 操作按钮组美化 */
.action-buttons {
    display: flex;
    gap: 8px;
}

.action-btn-mini {
    padding: 5px 10px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: all 0.2s;
    border: 1px solid transparent;
    cursor: pointer;
}

.action-btn-mini.trend {
    background-color: #f0f7ff;
    color: #007bff;
    border-color: #cce5ff;
}

.action-btn-mini.trend:hover {
    background-color: #007bff;
    color: white;
}

.action-btn-mini.analysis,
.action-btn-mini.ai {
    background-color: #ffffff;
    color: #000000;
    border-color: #d0d5dd;
}

.action-btn-mini.analysis:hover,
.action-btn-mini.ai:hover {
    background-color: #f5f5f5;
    color: #000000;
}

/* 数据变动指示器 */
.diff-indicator {
    font-size: 12px;
    font-weight: 600;
    margin-left: 4px;
}

.diff-up { color: #ef4444; } /* 分数上升/排名下降(数字变小)通常用红色表示警告或绿色表示进步，这里需统一 */
.diff-down { color: #22c55e; } 

/* 进步/退步指示器 */
.perf-up { color: #22c55e; } /* 进步用绿 */
.perf-down { color: #ef4444; } /* 退步用红 */