/* ==========================================================================
   ui-enhance.css — 页面视觉增强层
   作用域：仅对带 .pretty-page 的页面容器生效，不影响未改造的旧页面。
   设计目标：教师日常高频使用，信息密度高但视觉清爽、可点区域明确。
   ========================================================================== */

.pretty-page {
    --pp-accent: #4f46e5;
    --pp-accent-2: #7c3aed;
    --pp-ring: rgba(79, 70, 229, .16);
    --pp-radius: 16px;
    --pp-radius-sm: 10px;
    --pp-shadow: 0 1px 2px rgba(16, 24, 40, .04), 0 4px 16px rgba(16, 24, 40, .06);
    --pp-shadow-hover: 0 8px 28px rgba(16, 24, 40, .12);
    animation: pp-fade .28s ease both;
}

@keyframes pp-fade {
    from { opacity: 0; transform: translateY(6px); }
    to   { opacity: 1; transform: none; }
}

/* 页面主题色：不同模块用不同强调色，便于快速区分 */
.pretty-page.pp-grading  { --pp-accent: #4f46e5; --pp-accent-2: #7c3aed; --pp-ring: rgba(79,70,229,.16); }
.pretty-page.pp-question { --pp-accent: #0284c7; --pp-accent-2: #2563eb; --pp-ring: rgba(2,132,199,.16); }
.pretty-page.pp-upload   { --pp-accent: #059669; --pp-accent-2: #0d9488; --pp-ring: rgba(5,150,105,.16); }
.pretty-page.pp-homework { --pp-accent: #ea580c; --pp-accent-2: #f59e0b; --pp-ring: rgba(234,88,12,.16); }

/* --------------------------------------------------------------------------
   1. Hero 页头
   -------------------------------------------------------------------------- */
.pp-hero {
    position: relative;
    display: flex;
    align-items: center;
    gap: 18px;
    flex-wrap: wrap;
    padding: 22px 26px;
    margin-bottom: 20px;
    border-radius: var(--pp-radius);
    background: linear-gradient(120deg, var(--pp-accent) 0%, var(--pp-accent-2) 100%);
    color: #fff;
    overflow: hidden;
    box-shadow: 0 8px 22px -12px var(--pp-accent);
}
/* 右上角柔光装饰 */
.pp-hero::after {
    content: "";
    position: absolute;
    right: -60px;
    top: -80px;
    width: 240px;
    height: 240px;
    border-radius: 50%;
    background: rgba(255, 255, 255, .12);
    pointer-events: none;
}
.pp-hero::before {
    content: "";
    position: absolute;
    right: 90px;
    bottom: -110px;
    width: 180px;
    height: 180px;
    border-radius: 50%;
    background: rgba(255, 255, 255, .08);
    pointer-events: none;
}
.pp-hero-icon {
    flex: none;
    width: 54px;
    height: 54px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 27px;
    border-radius: 15px;
    background: rgba(255, 255, 255, .2);
    border: 1px solid rgba(255, 255, 255, .3);
    backdrop-filter: blur(4px);
}
.pp-hero-text { flex: 1; min-width: 200px; position: relative; z-index: 1; }
.pp-hero-text h1,
.pp-hero-text h2 {
    margin: 0;
    font-size: 23px;
    font-weight: 700;
    letter-spacing: .3px;
    color: #fff;
}
.pp-hero-text p {
    margin: 5px 0 0;
    font-size: 13.5px;
    color: rgba(255, 255, 255, .88);
    line-height: 1.5;
}
.pp-hero-actions {
    position: relative;
    z-index: 1;
    display: flex;
    gap: 10px;
    align-items: center;
    flex-wrap: wrap;
}
/* Hero 内的白色按钮 */
.pp-hero-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 9px 18px;
    border-radius: 10px;
    background: #fff;
    color: var(--pp-accent);
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: transform .15s, box-shadow .15s;
    box-shadow: 0 2px 8px rgba(0, 0, 0, .12);
}
.pp-hero-btn:hover { transform: translateY(-1px); box-shadow: 0 6px 16px rgba(0, 0, 0, .18); }
.pp-hero-btn.ghost {
    background: rgba(255, 255, 255, .16);
    color: #fff;
    border: 1px solid rgba(255, 255, 255, .4);
    box-shadow: none;
}
.pp-hero-btn.ghost:hover { background: rgba(255, 255, 255, .26); }
/* Hero 内的指标药丸 */
.pp-hero-pills { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 10px; }
.pp-pill {
    display: inline-flex;
    align-items: baseline;
    gap: 5px;
    padding: 4px 12px;
    border-radius: 999px;
    background: rgba(255, 255, 255, .18);
    border: 1px solid rgba(255, 255, 255, .28);
    font-size: 12.5px;
    color: #fff;
}
.pp-pill b { font-size: 15px; font-weight: 700; }
.pp-pill.warn { background: rgba(254, 240, 138, .28); border-color: rgba(254, 240, 138, .5); }

/* --------------------------------------------------------------------------
   2. 统计小卡片条
   -------------------------------------------------------------------------- */
.pp-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 12px;
    margin-bottom: 18px;
}
.pp-stat {
    position: relative;
    background: #fff;
    border: 1px solid var(--border, #e5e7eb);
    border-radius: var(--pp-radius-sm);
    padding: 14px 16px;
    box-shadow: var(--pp-shadow);
    transition: transform .15s, box-shadow .15s;
    overflow: hidden;
}
.pp-stat:hover { transform: translateY(-2px); box-shadow: var(--pp-shadow-hover); }
/* 左侧强调竖条 */
.pp-stat::before {
    content: "";
    position: absolute;
    left: 0; top: 0; bottom: 0;
    width: 3px;
    background: var(--pp-accent);
    opacity: .8;
}
.pp-stat .pp-stat-val {
    font-size: 25px;
    font-weight: 700;
    line-height: 1.15;
    color: var(--gray-900, #111827);
    font-variant-numeric: tabular-nums;
}
.pp-stat .pp-stat-label {
    margin-top: 3px;
    font-size: 12.5px;
    color: var(--gray-500, #6b7280);
}
.pp-stat.danger::before  { background: var(--danger, #dc2626); }
.pp-stat.danger  .pp-stat-val { color: var(--danger, #dc2626); }
.pp-stat.success::before { background: var(--success, #16a34a); }
.pp-stat.success .pp-stat-val { color: var(--success, #16a34a); }
.pp-stat.warning::before { background: var(--warning, #f59e0b); }
.pp-stat.warning .pp-stat-val { color: #b45309; }

/* --------------------------------------------------------------------------
   3. 通用卡片 / 分区标题
   -------------------------------------------------------------------------- */
.pp-card {
    background: #fff;
    border: 1px solid var(--border, #e5e7eb);
    border-radius: var(--pp-radius);
    box-shadow: var(--pp-shadow);
    overflow: hidden;
    margin-bottom: 18px;
}
.pp-card-head {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    padding: 13px 18px;
    border-bottom: 1px solid var(--gray-100, #f3f4f6);
    background: linear-gradient(180deg, #fcfdff, #f8fafc);
}
.pp-card-head h3,
.pp-card-head h4 {
    margin: 0;
    font-size: 15px;
    font-weight: 700;
    color: var(--gray-800, #1f2937);
    display: flex;
    align-items: center;
    gap: 7px;
}
.pp-card-head .pp-spacer { flex: 1; }
.pp-card-body { padding: 16px 18px; }

.pp-section-title {
    display: flex;
    align-items: center;
    gap: 9px;
    margin: 24px 0 12px;
    font-size: 16px;
    font-weight: 700;
    color: var(--gray-800, #1f2937);
}
.pp-section-title::before {
    content: "";
    width: 4px;
    height: 17px;
    border-radius: 3px;
    background: linear-gradient(180deg, var(--pp-accent), var(--pp-accent-2));
}
.pp-section-title .pp-count {
    font-size: 12.5px;
    font-weight: 600;
    color: var(--pp-accent);
    background: var(--pp-ring);
    padding: 2px 10px;
    border-radius: 999px;
}

/* --------------------------------------------------------------------------
   4. 表格美化
   -------------------------------------------------------------------------- */
.pp-table-card {
    background: #fff;
    border: 1px solid var(--border, #e5e7eb);
    border-radius: var(--pp-radius);
    box-shadow: var(--pp-shadow);
    overflow: hidden;
}
.pp-table-scroll {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}
.pretty-page .pp-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
    background: #fff;
    margin: 0;
    box-shadow: none;
    border-radius: 0;
}
.pretty-page .pp-table thead th {
    position: sticky;
    top: 0;
    z-index: 2;
    background: linear-gradient(180deg, #f8fafc, #f1f5f9);
    color: var(--gray-600, #4b5563);
    font-size: 12.5px;
    font-weight: 700;
    letter-spacing: .4px;
    text-align: left;
    padding: 11px 14px;
    white-space: nowrap;
    border-bottom: 1px solid var(--gray-200, #e5e7eb);
}
.pretty-page .pp-table tbody td {
    padding: 12px 14px;
    border-bottom: 1px solid var(--gray-100, #f3f4f6);
    color: var(--gray-700, #374151);
    vertical-align: middle;
}
.pretty-page .pp-table tbody tr { transition: background .12s; }
.pretty-page .pp-table tbody tr:hover { background: #f8fafc; }
.pretty-page .pp-table tbody tr:last-child td { border-bottom: none; }
/* 首列（主标题列）加重 */
.pretty-page .pp-table tbody td:first-child { color: var(--gray-900, #111827); }
.pp-table .pp-td-main { font-weight: 600; }
.pp-table .pp-td-sub {
    display: block;
    margin-top: 2px;
    font-size: 12px;
    font-weight: 400;
    color: var(--gray-500, #6b7280);
}
.pp-table .pp-nowrap { white-space: nowrap; }
.pp-table .pp-num { font-variant-numeric: tabular-nums; text-align: center; }

/* --------------------------------------------------------------------------
   5. 徽章 / 标签
   -------------------------------------------------------------------------- */
.pp-tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 2.5px 9px;
    border-radius: 7px;
    font-size: 12px;
    font-weight: 600;
    line-height: 1.5;
    white-space: nowrap;
    border: 1px solid transparent;
}
.pp-tag-gray   { background: #f1f5f9; color: #475569; border-color: #e2e8f0; }
.pp-tag-blue   { background: #eff6ff; color: #1d4ed8; border-color: #bfdbfe; }
.pp-tag-indigo { background: #eef2ff; color: #4338ca; border-color: #c7d2fe; }
.pp-tag-green  { background: #ecfdf5; color: #047857; border-color: #a7f3d0; }
.pp-tag-amber  { background: #fffbeb; color: #b45309; border-color: #fde68a; }
.pp-tag-red    { background: #fef2f2; color: #b91c1c; border-color: #fecaca; }
.pp-tag-purple { background: #faf5ff; color: #7e22ce; border-color: #e9d5ff; }
.pp-tag-dot::before {
    content: "";
    width: 6px; height: 6px;
    border-radius: 50%;
    background: currentColor;
    display: inline-block;
}

/* --------------------------------------------------------------------------
   6. 进度条
   -------------------------------------------------------------------------- */
.pp-prog { display: flex; align-items: center; gap: 9px; min-width: 130px; }
.pp-prog-bar {
    flex: 1;
    height: 7px;
    min-width: 60px;
    border-radius: 999px;
    background: var(--gray-200, #e5e7eb);
    overflow: hidden;
}
.pp-prog-fill {
    height: 100%;
    border-radius: 999px;
    background: linear-gradient(90deg, var(--pp-accent), var(--pp-accent-2));
    transition: width .4s ease;
}
.pp-prog-fill.done { background: linear-gradient(90deg, #16a34a, #22c55e); }
.pp-prog-txt {
    font-size: 12px;
    color: var(--gray-500, #6b7280);
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
}

/* --------------------------------------------------------------------------
   7. 功能入口卡片（宫格）
   -------------------------------------------------------------------------- */
.pp-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
    gap: 14px;
    margin-bottom: 8px;
}
.pp-entry {
    position: relative;
    display: block;
    padding: 18px 18px 16px;
    background: #fff;
    border: 1px solid var(--border, #e5e7eb);
    border-radius: var(--pp-radius);
    text-decoration: none;
    box-shadow: var(--pp-shadow);
    transition: transform .16s, box-shadow .16s, border-color .16s;
    overflow: hidden;
}
.pp-entry::after {
    content: "";
    position: absolute;
    inset: 0 0 auto 0;
    height: 3px;
    background: linear-gradient(90deg, var(--pp-accent), var(--pp-accent-2));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform .22s ease;
}
.pp-entry:hover {
    transform: translateY(-3px);
    box-shadow: var(--pp-shadow-hover);
    border-color: var(--pp-accent);
}
.pp-entry:hover::after { transform: scaleX(1); }
.pp-entry-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    font-size: 21px;
    border-radius: 12px;
    background: var(--pp-ring);
    margin-bottom: 10px;
}
.pp-entry h3 {
    margin: 0 0 5px;
    font-size: 15px;
    font-weight: 700;
    color: var(--gray-900, #111827);
}
.pp-entry p {
    margin: 0;
    font-size: 12.5px;
    line-height: 1.55;
    color: var(--gray-500, #6b7280);
}
.pp-entry-badge {
    position: absolute;
    top: 12px;
    right: 12px;
    background: var(--danger, #dc2626);
    color: #fff;
    font-size: 11.5px;
    font-weight: 700;
    padding: 2px 9px;
    border-radius: 999px;
    box-shadow: 0 2px 6px rgba(220, 38, 38, .35);
}

/* --------------------------------------------------------------------------
   8. 筛选栏
   -------------------------------------------------------------------------- */
.pp-filter {
    background: #fff;
    border: 1px solid var(--border, #e5e7eb);
    border-radius: var(--pp-radius);
    box-shadow: var(--pp-shadow);
    padding: 14px 16px;
    margin-bottom: 18px;
}
.pp-filter-row {
    display: flex;
    align-items: flex-end;
    gap: 12px;
    flex-wrap: wrap;
}
.pp-field { display: flex; flex-direction: column; gap: 5px; }
.pp-field > label {
    font-size: 12px;
    font-weight: 600;
    color: var(--gray-500, #6b7280);
    letter-spacing: .2px;
}
.pretty-page .pp-field select,
.pretty-page .pp-field input[type="text"],
.pretty-page .pp-field input[type="number"] {
    height: 36px;
    padding: 0 11px;
    font-size: 13.5px;
    color: var(--gray-800, #1f2937);
    background: #fff;
    border: 1px solid var(--gray-300, #d1d5db);
    border-radius: 9px;
    outline: none;
    transition: border-color .15s, box-shadow .15s;
    max-width: 100%;
}
.pretty-page .pp-field select:focus,
.pretty-page .pp-field input:focus {
    border-color: var(--pp-accent);
    box-shadow: 0 0 0 3px var(--pp-ring);
}
.pp-filter-note {
    margin-left: auto;
    font-size: 12.5px;
    color: var(--gray-500, #6b7280);
}

/* 圆形药丸型筛选按钮 */
.pp-chips { display: flex; gap: 7px; flex-wrap: wrap; align-items: center; }
.pp-chip {
    padding: 5.5px 14px;
    font-size: 13px;
    border-radius: 999px;
    border: 1px solid var(--gray-200, #e5e7eb);
    background: #fff;
    color: var(--gray-600, #4b5563);
    cursor: pointer;
    transition: all .14s;
    white-space: nowrap;
}
.pp-chip:hover { border-color: var(--pp-accent); color: var(--pp-accent); background: var(--pp-ring); }
.pp-chip.active {
    background: linear-gradient(120deg, var(--pp-accent), var(--pp-accent-2));
    border-color: transparent;
    color: #fff;
    font-weight: 600;
    box-shadow: 0 2px 8px -2px var(--pp-accent);
}

/* --------------------------------------------------------------------------
   9. 空状态
   -------------------------------------------------------------------------- */
.pp-empty {
    background: #fff;
    border: 1px dashed var(--gray-300, #d1d5db);
    border-radius: var(--pp-radius);
    padding: 46px 24px;
    text-align: center;
}
.pp-empty-icon {
    font-size: 46px;
    line-height: 1;
    margin-bottom: 12px;
    opacity: .75;
}
.pp-empty h3 {
    margin: 0 0 6px;
    font-size: 16px;
    font-weight: 700;
    color: var(--gray-700, #374151);
}
.pp-empty p {
    margin: 0 0 16px;
    font-size: 13.5px;
    color: var(--gray-500, #6b7280);
}

/* --------------------------------------------------------------------------
   10. 按钮微调（仅作用域内）
   -------------------------------------------------------------------------- */
.pretty-page .pp-btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 6.5px 13px;
    font-size: 13px;
    font-weight: 500;
    border-radius: 9px;
    border: 1px solid var(--gray-200, #e5e7eb);
    background: #fff;
    color: var(--gray-700, #374151);
    cursor: pointer;
    text-decoration: none;
    transition: all .14s;
    white-space: nowrap;
}
.pretty-page .pp-btn:hover {
    border-color: var(--pp-accent);
    color: var(--pp-accent);
    background: var(--pp-ring);
}
.pretty-page .pp-btn-primary {
    background: linear-gradient(120deg, var(--pp-accent), var(--pp-accent-2));
    border-color: transparent;
    color: #fff;
    font-weight: 600;
}
.pretty-page .pp-btn-primary:hover {
    color: #fff;
    filter: brightness(1.07);
    box-shadow: 0 4px 12px -3px var(--pp-accent);
}
.pretty-page .pp-btn-success {
    background: #ecfdf5; color: #047857; border-color: #a7f3d0;
}
.pretty-page .pp-btn-success:hover { background: #d1fae5; color: #065f46; border-color: #6ee7b7; }
.pretty-page .pp-btn-danger { color: #b91c1c; border-color: #fecaca; background: #fff; }
.pretty-page .pp-btn-danger:hover { background: #fef2f2; border-color: #f87171; color: #991b1b; }
.pretty-page .pp-btn-warning { color: #b45309; border-color: #fde68a; background: #fffbeb; }
.pretty-page .pp-btn-warning:hover { background: #fef3c7; border-color: #fbbf24; color: #92400e; }

/* 操作列：按钮成组 */
.pp-ops { display: flex; gap: 6px; flex-wrap: wrap; align-items: center; }

/* --------------------------------------------------------------------------
   11. 响应式
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
    .pp-hero { padding: 18px; gap: 13px; }
    .pp-hero-icon { width: 46px; height: 46px; font-size: 23px; border-radius: 13px; }
    .pp-hero-text h1, .pp-hero-text h2 { font-size: 19px; }
    .pp-hero-text p { font-size: 12.5px; }
    .pp-hero-actions { width: 100%; }
    .pp-hero-btn { flex: 1; justify-content: center; }
    .pp-stats { grid-template-columns: repeat(2, 1fr); gap: 10px; }
    .pp-stat { padding: 12px 13px; }
    .pp-stat .pp-stat-val { font-size: 21px; }
    .pp-grid { grid-template-columns: 1fr; }
    .pretty-page .pp-table { font-size: 13px; }
    .pretty-page .pp-table thead th,
    .pretty-page .pp-table tbody td { padding: 9px 10px; }
    .pp-filter-note { margin-left: 0; width: 100%; }
    /* 组卷系统：顶部筛选/搜索表单在手机上纵向堆叠、控件占满宽度、按钮全宽 */
    .pp-filter .search-form { flex-direction: column; align-items: stretch; gap: 10px; }
    .pp-filter .search-form .pp-field,
    .pp-filter .search-form .pp-field[style] { flex: 1 1 100% !important; min-width: 100% !important; width: 100% !important; }
    .pp-filter .search-form .pp-field select,
    .pp-filter .search-form .pp-field input[type="text"],
    .pp-filter .search-form .pp-field input[type="number"] { width: 100%; }
    .pp-filter .search-form .pp-btn { width: 100%; justify-content: center; }
    .pp-chips { overflow-x: auto; flex-wrap: nowrap; padding-bottom: 6px; -webkit-overflow-scrolling: touch; }
    .pp-chips .pp-chip { flex: 0 0 auto; }
    .pp-subject-row { flex-wrap: wrap; gap: 8px; }
}

/* 打印：去掉装饰，节省墨水 */
@media print {
    .pp-hero { background: none !important; color: #000; box-shadow: none; border: 1px solid #ddd; }
    .pp-hero-text h1, .pp-hero-text h2, .pp-hero-text p { color: #000; }
    .pp-hero::before, .pp-hero::after { display: none; }
    .pp-hero-actions, .pp-filter, .pp-ops { display: none !important; }
    .pp-table-card, .pp-card, .pp-stat { box-shadow: none; }
}