/* ============================================================
   考试系统 全局样式（自包含，无外部依赖，内网可离线运行）
   ============================================================ */
:root {
    --pri: #2456e5;
    --pri-d: #1a43b8;
    --ok: #16a34a;
    --err: #dc2626;
    --warn: #d97706;
    --bg: #f3f5f9;
    --card: #ffffff;
    --line: #e3e8f0;
    --txt: #24292f;
    --txt2: #6a737d;
    --radius: 8px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
    font-family: "Microsoft YaHei", "PingFang SC", "Segoe UI", sans-serif;
    font-size: 14px; color: var(--txt); background: var(--bg);
    display: flex; flex-direction: column; min-height: 100vh;
}
a { color: var(--pri); text-decoration: none; }
a:hover { color: var(--pri-d); }

/* ===== 顶栏 ===== */
.topbar {
    background: linear-gradient(90deg, #1d3f8f, #2456e5);
    color: #fff; display: flex; align-items: center; gap: 18px;
    padding: 0 20px; height: 52px; flex-shrink: 0; flex-wrap: wrap;
}
.topbar-brand { font-size: 17px; font-weight: bold; white-space: nowrap; }
.topbar-nav { display: flex; gap: 4px; flex-wrap: wrap; flex: 1; }
.topbar-nav a { color: #dbe6ff; padding: 6px 12px; border-radius: 6px; white-space: nowrap; }
.topbar-nav a:hover { background: rgba(255,255,255,.14); color: #fff; }
.topbar-user { display: flex; align-items: center; gap: 10px; font-size: 13px; color: #dbe6ff; }
.inline-form { display: inline; }

/* ===== 布局 ===== */
.wrap { width: 96%; max-width: 1280px; margin: 16px auto; flex: 1; }
.footer { text-align: center; color: var(--txt2); font-size: 12px; padding: 14px 0; }

/* ===== 提示 ===== */
.msg { width: 96%; max-width: 1280px; margin: 12px auto 0; padding: 10px 14px; border-radius: var(--radius); white-space: pre-line; }
.msg-ok { background: #e8f7ee; color: var(--ok); border: 1px solid #b6e2c8; }
.msg-error { background: #fdecec; color: var(--err); border: 1px solid #f5c2c2; }

/* ===== 卡片 / 页头 ===== */
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; margin-bottom: 16px; }
.card h2 { font-size: 16px; margin-bottom: 12px; }
.page-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; flex-wrap: wrap; gap: 8px; }
.page-head h1 { font-size: 19px; }
.page-actions { display: flex; gap: 8px; flex-wrap: wrap; }

/* ===== 筛选栏 ===== */
.filter-bar { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-bottom: 12px; }
.filter-bar label { color: var(--txt2); }
.filter-bar input, .filter-bar select {
    height: 32px; padding: 0 8px; border: 1px solid var(--line); border-radius: 6px; background: #fff;
}
.filter-bar input[type="date"], .filter-bar input[type="number"] { height: 32px; }

/* ===== 按钮 ===== */
.btn {
    display: inline-flex; align-items: center; gap: 4px; border: 1px solid var(--line);
    background: #fff; color: var(--txt); border-radius: 6px; padding: 6px 14px;
    cursor: pointer; font-size: 14px; line-height: 1.4; transition: .15s;
}
.btn:hover { border-color: var(--pri); color: var(--pri); }
.btn-primary { background: var(--pri); border-color: var(--pri); color: #fff; }
.btn-primary:hover { background: var(--pri-d); color: #fff; }
.btn-danger { color: var(--err); }
.btn-danger:hover { border-color: var(--err); color: var(--err); background: #fff5f5; }
.btn-ghost { background: transparent; }
.btn-sm { padding: 3px 10px; font-size: 13px; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

/* ===== 表格 ===== */
.tbl-tools { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; gap: 8px; flex-wrap: wrap; }
.tbl-info { color: var(--txt2); font-size: 13px; }
.grid { width: 100%; border-collapse: collapse; background: #fff; }
.grid th, .grid td { border: 1px solid var(--line); padding: 8px 10px; text-align: center; vertical-align: middle; }
.grid th { background: #f7f9fc; font-weight: 600; white-space: nowrap; user-select: none; }
.grid tbody tr:hover { background: #f6f9ff; }
.grid .text-left { text-align: left; }
.grid th a.sort-link { color: var(--txt); }
.grid th.sorted a.sort-link { color: var(--pri); font-weight: bold; }
.grid th.col-hide, .grid td.col-hide { display: none; }
.grid th[data-sort] { cursor: pointer; }
.grid th[data-sort]:hover { color: var(--pri); }
.row-right td { background: #f4fbf6; }
.row-wrong td { background: #fef6f6; }
.text-ok { color: var(--ok); } .text-err { color: var(--err); } .text-warn { color: var(--warn); }
.muted { color: var(--txt2); }

/* 徽标 */
.badge { display: inline-block; padding: 2px 8px; border-radius: 10px; font-size: 12px; }
.badge-ok { background: #e8f7ee; color: var(--ok); }
.badge-err { background: #fdecec; color: var(--err); }
.badge-warn { background: #fef7e8; color: var(--warn); }
.badge-info { background: #e8effd; color: var(--pri); }
.badge-off { background: #f0f1f3; color: var(--txt2); }

/* ===== 列设置下拉 ===== */
.col-menu { position: relative; display: inline-block; }
.col-menu-list {
    position: absolute; right: 0; top: 110%; z-index: 30; background: #fff; border: 1px solid var(--line);
    border-radius: var(--radius); box-shadow: 0 8px 24px rgba(20,40,80,.12); padding: 8px 0; min-width: 150px; display: none;
}
.col-menu-list.show { display: block; }
.col-menu-list label { display: flex; align-items: center; gap: 6px; padding: 5px 14px; cursor: pointer; white-space: nowrap; }
.col-menu-list label:hover { background: #f6f9ff; }

/* ===== 分页器 ===== */
.pager { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; padding: 12px 2px 2px; font-size: 13px; }
.pager-total b { color: var(--pri); }
.pager-size select { height: 28px; border: 1px solid var(--line); border-radius: 6px; }
.pager-btns { display: flex; gap: 4px; flex-wrap: wrap; }
.pg-btn {
    min-width: 30px; height: 30px; padding: 0 8px; display: inline-flex; align-items: center; justify-content: center;
    border: 1px solid var(--line); border-radius: 6px; background: #fff; color: var(--txt);
}
.pg-btn:hover { border-color: var(--pri); color: var(--pri); }
.pg-btn.active { background: var(--pri); border-color: var(--pri); color: #fff; }
.pg-btn.disabled { color: #b9c2ce; border-color: #eef1f5; background: #fafbfc; pointer-events: none; }
.pg-ellipsis { padding: 0 2px; color: var(--txt2); }
.pager-jump input { width: 62px; height: 28px; border: 1px solid var(--line); border-radius: 6px; text-align: center; }

/* ===== 表单 ===== */
.form-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 12px 20px; }
.form-item { display: flex; flex-direction: column; gap: 5px; }
.form-item > label { color: var(--txt2); font-size: 13px; }
.form-item input[type="text"], .form-item input[type="password"], .form-item input[type="number"],
.form-item input[type="datetime-local"], .form-item select, .form-item textarea {
    height: 34px; padding: 0 10px; border: 1px solid var(--line); border-radius: 6px; font-size: 14px; width: 100%;
}
.form-item textarea { height: auto; min-height: 70px; padding: 8px 10px; }
.form-item input:focus, .form-item select:focus, .form-item textarea:focus { outline: none; border-color: var(--pri); }
.form-actions { margin-top: 16px; display: flex; gap: 10px; }
.form-required::after { content: " *"; color: var(--err); }
.check-row { display: flex; flex-wrap: wrap; gap: 6px 14px; }
.check-row label { display: inline-flex; align-items: center; gap: 5px; border: 1px solid var(--line); border-radius: 6px; padding: 5px 10px; cursor: pointer; }
.check-row label.on { border-color: var(--pri); background: #eef3ff; }
.check-row label.disabled { color: #b9c2ce; background: #fafbfc; cursor: not-allowed; }
.field-error { color: var(--err); font-size: 12px; }

/* ===== 弹窗 ===== */
.modal-mask {
    display: none; position: fixed; inset: 0; background: rgba(15,25,45,.45); z-index: 100;
    align-items: flex-start; justify-content: center; overflow: auto; padding: 6vh 16px;
}
.modal-mask.show { display: flex; }
.modal {
    background: #fff; border-radius: 10px; width: 720px; max-width: 96vw; padding: 18px 20px;
    box-shadow: 0 12px 40px rgba(10,25,60,.25);
}
.modal.modal-lg { width: 980px; }
.modal h3 { font-size: 16px; margin-bottom: 14px; display: flex; justify-content: space-between; align-items: center; }
.modal-close { border: none; background: none; font-size: 18px; cursor: pointer; color: var(--txt2); }
.modal-foot { margin-top: 16px; display: flex; justify-content: flex-end; gap: 10px; }

/* ===== 统计 ===== */
.stat-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 12px; margin-bottom: 16px; }
.stat-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 14px; text-align: center; }
.stat-card .num { font-size: 24px; font-weight: bold; color: var(--pri); }
.stat-card .num.ok { color: var(--ok); } .stat-card .num.err { color: var(--err); }
.stat-card .lbl { color: var(--txt2); font-size: 12px; margin-top: 4px; }
.hbar-wrap { margin-bottom: 8px; }
.hbar-name { display: flex; justify-content: space-between; font-size: 13px; margin-bottom: 3px; }
.hbar { height: 10px; background: #edf1f8; border-radius: 5px; overflow: hidden; }
.hbar > div { height: 100%; background: linear-gradient(90deg, #2456e5, #5b8cff); border-radius: 5px; }

/* ===== 考试页 ===== */
.exam-wrap { max-width: 900px; margin: 0 auto; }
.exam-head { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 8px; }
.exam-timer { font-size: 22px; font-weight: bold; color: var(--err); font-variant-numeric: tabular-nums; }
.exam-timer.warn { animation: blink 1s infinite; }
@keyframes blink { 50% { opacity: .35; } }
.exam-qnum { font-size: 15px; }
.q-title { font-size: 17px; margin: 14px 0; line-height: 1.7; white-space: pre-wrap; }
.q-type { color: var(--pri); font-weight: bold; }
.q-options { display: flex; flex-direction: column; gap: 10px; margin: 10px 0 18px; }
.q-opt { display: flex; align-items: flex-start; gap: 10px; border: 1px solid var(--line); border-radius: 8px; padding: 12px 14px; cursor: pointer; background: #fff; }
.q-opt:hover { border-color: var(--pri); }
.q-opt.on { border-color: var(--pri); background: #eef3ff; }
.q-opt .key { font-weight: bold; color: var(--pri); }
.q-opt.multi.on .key::after { content: " ✓"; }
.exam-nav { display: flex; justify-content: space-between; margin-top: 16px; }
.answer-cards { display: flex; flex-wrap: wrap; gap: 6px; margin: 12px 0; }
.ans-card { min-width: 34px; height: 30px; border: 1px solid var(--line); border-radius: 6px; display: inline-flex; align-items: center; justify-content: center; cursor: pointer; background: #fff; font-size: 12px; padding: 0 4px; }
.ans-card.done { border-color: var(--pri); color: var(--pri); background: #eef3ff; }
.ans-card.cur { background: var(--pri); border-color: var(--pri); color: #fff; }
.ans-card.cur.done { color: #fff; }

/* ===== 数据库重置页 ===== */
.reset-tip { background: #fff8e6; border: 1px solid #f5dfae; border-radius: var(--radius); padding: 12px 14px; margin-bottom: 14px; color: #8a6116; }
.reset-progress { display: none; margin-top: 14px; }
.reset-progress .bar { height: 14px; background: #edf1f8; border-radius: 7px; overflow: hidden; }
.reset-progress .bar > div { height: 100%; background: var(--pri); transition: width .25s; width: 0; }
.reset-result { margin-top: 10px; display: flex; flex-direction: column; gap: 4px; font-size: 13px; }

/* ===== 细节 ===== */
.options-cell div { margin: 1px 0; }
.paper-summary { display: flex; gap: 24px; flex-wrap: wrap; padding: 10px 12px; background: #f7f9fc; border-radius: 6px; margin-bottom: 10px; }
.detail-mask-content { max-height: 68vh; overflow: auto; }
.login-wrap { max-width: 380px; margin: 8vh auto 0; }
.login-logo { text-align: center; font-size: 26px; margin-bottom: 18px; }
.login-card { background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 26px; box-shadow: 0 10px 30px rgba(20,40,90,.08); }
.login-card .form-item { margin-bottom: 14px; }
.gap-col { display: flex; flex-direction: column; gap: 14px; }