/* ==========================================================================
   日清表 · 样式
   · 第一屏尽量把六科今天的全部内容铺满：手机单列、平板两列、电脑三列
   · 屏幕越大字号越大（教室大屏自动变大），卡片高度随内容自动增长，不截断
   · 填写 / 导出按钮放在页面最下方（往下滑才看到），不占常驻空间
   · 不依赖任何外部资源（离线/内网也能正常显示）
   ========================================================================== */

:root {
    --bg: #f2f4f8;
    --card: #ffffff;
    --ink: #111827;
    --ink-2: #4b5563;
    --ink-3: #9aa3af;
    --line: #e5e7eb;
    --brand: #2563eb;
    --brand-dark: #1d4ed8;
    --ok: #059669;
    --radius: 16px;
    --shadow: 0 1px 2px rgba(15, 23, 42, .04), 0 10px 26px rgba(15, 23, 42, .06);
}

* { box-sizing: border-box; }

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
        "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
}

/* 六科主题色：卡片、弹窗里的科目按钮共用 */
[data-subject="chinese"]   { --sc: #e4572e; --sc-soft: #fdeee9; }
[data-subject="math"]      { --sc: #2563eb; --sc-soft: #e8f0fe; }
[data-subject="english"]   { --sc: #7c3aed; --sc-soft: #f1ebfd; }
[data-subject="physics"]   { --sc: #0e9f6e; --sc-soft: #e6f7f0; }
[data-subject="chemistry"] { --sc: #d97706; --sc-soft: #fef3e2; }
[data-subject="biology"]   { --sc: #0891b2; --sc-soft: #e4f5fa; }

/* ---------------------------- 顶栏（日期居中） ---------------------------- */

/* 日期跟着页面一起滚走，不常驻（不挡视野） */
.topbar {
    position: relative;
    z-index: 1;
    background: #fff;
    border-bottom: 1px solid var(--line);
}

.topbar-in {
    max-width: 1760px;
    margin: 0 auto;
    padding: .7rem 1.1rem .75rem;
    text-align: center;
}

.today-block {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: .3rem;
}

.today-date {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: .04em;
    line-height: 1.25;
    color: var(--ink);
}

.today-meta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: .55rem;
    font-size: .9rem;
    color: var(--ink-2);
}

.today-meta .wk { font-weight: 600; }

/* 以下两组给后台页面用 */
.brand {
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: .04em;
    color: var(--ink);
    text-decoration: none;
    display: flex;
    align-items: baseline;
    gap: .5rem;
}

.brand .sub {
    font-size: .78rem;
    font-weight: 600;
    color: var(--ink-3);
    letter-spacing: 0;
}

.brand .dotmark {
    display: inline-block;
    width: .55rem;
    height: .55rem;
    border-radius: 50%;
    background: var(--brand);
    margin-right: .1rem;
}

.today-line {
    font-size: .95rem;
    color: var(--ink-2);
    display: flex;
    align-items: center;
    gap: .5rem;
    flex-wrap: wrap;
}

.today-line b { color: var(--ink); font-weight: 700; }

.pill {
    display: inline-flex;
    align-items: center;
    gap: .3rem;
    padding: .12rem .6rem;
    border-radius: 999px;
    background: #eef2f7;
    color: var(--ink-2);
    font-size: .82rem;
    font-weight: 600;
}

.pill.ok { background: #e7f7f0; color: var(--ok); }

.topbar-actions {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: .5rem;
}

/* ---------------------------- 按钮 ---------------------------- */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .35rem;
    padding: .55rem 1rem;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: #fff;
    color: var(--ink);
    font: inherit;
    font-size: .95rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: background .15s, border-color .15s, transform .08s, box-shadow .15s;
    white-space: nowrap;
}

.btn:hover { background: #f8fafc; border-color: #cfd6e0; }
.btn:active { transform: translateY(1px); }

.btn.primary {
    background: var(--brand);
    border-color: var(--brand);
    color: #fff;
    box-shadow: 0 4px 14px rgba(37, 99, 235, .22);
}

.btn.primary:hover { background: var(--brand-dark); border-color: var(--brand-dark); }

.btn.big { padding: .8rem 2.4rem; font-size: 1.12rem; border-radius: 14px; }

.btn.danger { color: #b91c1c; border-color: #f3d3d3; }
.btn.danger:hover { background: #fef2f2; }

.btn[disabled] { opacity: .55; cursor: default; }

.btn.mini {
    padding: .25rem .6rem;
    font-size: .8rem;
    font-weight: 600;
    border-radius: 8px;
    color: var(--ink-2);
}

/* ---------------------------- 主体 ---------------------------- */

.wrap {
    max-width: 1560px;
    margin: 0 auto;
    padding: 1rem 1.1rem 2rem;
}

/* 卡片之间没有间隙：六张卡拼成一整块，相邻卡共用一条 1px 线 */
.grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0;
    padding: 1px;
    background: var(--card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}

/* 科目卡片 */
.card {
    position: relative;
    display: flex;
    flex-direction: column;
    background: var(--card);
    border: 0;
    border-radius: 0;
    box-shadow: 0 0 0 1px var(--line);
    overflow: hidden;
}

.card::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 5px;
    background: var(--sc, var(--brand));
}

.card.filled { background: var(--card); }

.card[data-edit] { cursor: pointer; transition: background .15s; }
.card[data-edit]:hover { background: #f7f9fc; }

.card-head {
    display: flex;
    align-items: center;
    gap: .6rem;
    padding: .5rem .9rem 0 1.05rem;
}

/* 科目名做小一点，把空间让给内容 */
.tag {
    font-size: .98rem;
    font-weight: 800;
    letter-spacing: .1em;
    color: var(--sc, var(--brand));
}

.state {
    margin-left: auto;
    font-size: .72rem;
    font-weight: 600;
    color: var(--ink-3);
    background: #f4f6f9;
    padding: .12rem .55rem;
    border-radius: 999px;
}

.state.ok { color: var(--ok); background: #e7f7f0; }

.card-body {
    flex: 1;
    padding: .15rem 1rem .8rem 1.05rem;
    min-height: 2.2rem;
}

.content {
    margin: 0;
    font-size: 1.05rem;
    line-height: 1.65;
    color: var(--ink);
    white-space: pre-wrap;
    word-break: break-word;
}

.content.is-empty {
    color: var(--ink-3);
    font-size: .95rem;
}

/* ---------------------------- 页面底部操作区（往下滑才看到） ---------------------------- */

.page-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: .8rem;
    max-width: 52rem;
    margin: 1.9rem auto .6rem;
    padding-top: 1.7rem;
    border-top: 1px dashed var(--line);
}

.footnote {
    text-align: center;
    color: var(--ink-3);
    font-size: .8rem;
    padding: .6rem 0 .4rem;
}

/* 页面最下方的署名（跟着内容走，不常驻、不遮挡内容） */
.site-foot {
    margin: 0 0 1.4rem;
    padding: .2rem 0 1.6rem;
    letter-spacing: .04em;
    font-size: .78rem;
}

/* ---------------------------- 后台：主页卡片顺序 ---------------------------- */

.panel-hint {
    margin: 0 0 .9rem;
    color: var(--ink-2);
    font-size: .9rem;
    line-height: 1.6;
}

.panel-hint.msg-ok { color: var(--ok); font-weight: 600; }

.panel-hint code {
    background: #f1f3f7;
    border-radius: 4px;
    padding: .05rem .3rem;
    font-size: .86em;
}

.order-list {
    display: flex;
    flex-direction: column;
    gap: .45rem;
}

.order-item {
    display: flex;
    align-items: center;
    gap: .6rem;
    margin: 0;
    padding: .45rem .75rem;
    background: var(--card);
    border: 1px solid var(--line);
    border-left: 4px solid var(--sc, var(--brand));
    border-radius: 10px;
}

.order-item .ord { color: var(--ink-3); font-size: .82rem; min-width: 1rem; }
.order-item .tag { color: var(--sc, var(--brand)); }

.order-item .order-swap {
    margin-left: auto;
    max-width: 13rem;
    padding: .3rem .5rem;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #fff;
    color: var(--ink-2);
    font-size: .85rem;
    font-family: inherit;
}

.order-item .order-swap:focus { outline: 2px solid var(--brand); outline-offset: 1px; }

.order-actions {
    display: flex;
    align-items: center;
    gap: .85rem;
    flex-wrap: wrap;
    margin-top: 1rem;
}

.order-tip { color: var(--ink-3); font-size: .85rem; }
.order-tip.dirty { color: var(--brand); font-weight: 600; }

/* ---------------------------- 弹窗 ---------------------------- */

.modal {
    position: fixed;
    inset: 0;
    z-index: 100;
    display: none;
}

.modal.open { display: flex; align-items: center; justify-content: center; padding: 1rem; }

.modal-mask {
    position: absolute;
    inset: 0;
    background: rgba(15, 23, 42, .48);
    backdrop-filter: blur(2px);
}

.modal-box {
    position: relative;
    width: 100%;
    max-width: 580px;
    max-height: 92vh;
    overflow: auto;
    background: #fff;
    border-radius: 18px;
    box-shadow: 0 30px 70px rgba(15, 23, 42, .32);
    padding: 1.3rem 1.4rem 1.2rem;
}

.modal-title {
    display: flex;
    align-items: center;
    gap: .5rem;
    font-size: 1.15rem;
    font-weight: 800;
    margin-bottom: .2rem;
}

.modal-title .tag { font-size: 1.15rem; }

/* 弹窗标题跟着当前科目变色（JS 会给 .modal-box 打上 data-subject） */
.modal-box[data-subject] .modal-title { color: var(--sc, var(--brand)); }

.modal-sub {
    color: var(--ink-3);
    font-size: .84rem;
    margin-bottom: .9rem;
}

.field-label {
    display: block;
    font-size: .86rem;
    font-weight: 700;
    color: var(--ink-2);
    margin: .9rem 0 .45rem;
}

.chips {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: .5rem;
}

.chip {
    padding: .6rem .3rem;
    border: 1.5px solid var(--line);
    border-radius: 11px;
    background: #fff;
    color: var(--ink-2);
    font: inherit;
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: .05em;
    cursor: pointer;
    transition: .15s;
}

.chip:hover { border-color: #cfd6e0; background: #fafbfc; }

.chip.on {
    border-color: var(--sc, var(--brand));
    background: var(--sc-soft, #eff6ff);
    color: var(--sc, var(--brand));
}

textarea {
    width: 100%;
    min-height: 8.5rem;
    padding: .75rem .85rem;
    border: 1.5px solid var(--line);
    border-radius: 12px;
    font: inherit;
    font-size: 1rem;
    line-height: 1.7;
    color: var(--ink);
    background: #fff;
    resize: vertical;
}

textarea:focus {
    outline: none;
    border-color: var(--brand);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, .13);
}

.counter {
    display: flex;
    justify-content: space-between;
    font-size: .78rem;
    color: var(--ink-3);
    margin-top: .35rem;
}

.modal-actions {
    display: flex;
    align-items: center;
    gap: .6rem;
    margin-top: 1.1rem;
}

.modal-actions .spacer { margin-left: auto; }

/* ---------------------------- 提示条 ---------------------------- */

.toast {
    position: fixed;
    left: 50%;
    bottom: 2.4rem;
    transform: translate(-50%, 14px);
    z-index: 200;
    padding: .55rem 1.15rem;
    border-radius: 999px;
    background: #111827;
    color: #fff;
    font-size: .9rem;
    font-weight: 600;
    box-shadow: 0 10px 24px rgba(15, 23, 42, .3);
    opacity: 0;
    pointer-events: none;
    transition: opacity .2s, transform .2s;
}

.toast.on { opacity: 1; transform: translate(-50%, 0); }
.toast.err { background: #b91c1c; }

/* ==========================================================================
   后台
   ========================================================================== */

.admin-wrap {
    max-width: 1560px;
    margin: 0 auto;
    padding: 1.1rem 1.1rem 3rem;
}

.admin-cols {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    align-items: start;
}

.panel {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 1rem 1.1rem 1.2rem;
}

.panel h2 {
    font-size: 1rem;
    font-weight: 800;
    margin: 0 0 .8rem;
    display: flex;
    align-items: center;
    gap: .5rem;
    flex-wrap: wrap;
}

.panel h2 .grow { margin-left: auto; font-weight: 600; font-size: .84rem; color: var(--ink-3); }

.cal {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: .3rem;
}

.cal .dow {
    text-align: center;
    font-size: .78rem;
    font-weight: 700;
    color: var(--ink-3);
    padding: .2rem 0;
}

.cal .day {
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 3.1rem;
    padding: .3rem .35rem;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: #fff;
    color: var(--ink);
    text-decoration: none;
    font-size: .86rem;
    transition: .12s;
}

.cal .day.blank { border: none; background: transparent; }
.cal .day:hover { border-color: #c7d2fe; background: #f8faff; }
.cal .day.has { background: #f2f8ff; border-color: #cfe1fd; }
.cal .day.today { outline: 2px solid var(--brand); outline-offset: 1px; }
.cal .day.sel { background: var(--brand); border-color: var(--brand); color: #fff; }
.cal .day.sel .badge { color: rgba(255, 255, 255, .9); }
.cal .day .n { font-weight: 700; }
.cal .day .badge { font-size: .68rem; color: var(--ink-3); }

.legend {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    font-size: .78rem;
    color: var(--ink-3);
    margin-top: .8rem;
}

.filters {
    display: flex;
    align-items: center;
    gap: .5rem;
    flex-wrap: wrap;
}

input[type="date"], input[type="text"] {
    padding: .45rem .6rem;
    border: 1px solid var(--line);
    border-radius: 9px;
    font: inherit;
    font-size: .92rem;
    color: var(--ink);
    background: #fff;
}

input[type="date"]:focus, input[type="text"]:focus {
    outline: none;
    border-color: var(--brand);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, .12);
}

table.rec {
    width: 100%;
    border-collapse: collapse;
    font-size: .95rem;
}

table.rec th, table.rec td {
    border-bottom: 1px solid var(--line);
    padding: .6rem .5rem;
    text-align: left;
    vertical-align: top;
}

table.rec th {
    font-size: .8rem;
    color: var(--ink-3);
    font-weight: 700;
    border-bottom: 1px solid var(--line);
    white-space: nowrap;
}

table.rec td.subj {
    width: 5.5rem;
    font-weight: 800;
    color: var(--sc, var(--ink));
    white-space: nowrap;
}

table.rec tr:last-child td { border-bottom: none; }
table.rec td .content.is-empty { color: var(--ink-3); }
table.rec td.act { width: 7rem; text-align: right; white-space: nowrap; }
table.rec td.time { width: 6rem; color: var(--ink-3); font-size: .82rem; white-space: nowrap; }

.stat-row {
    display: flex;
    gap: 1.4rem;
    flex-wrap: wrap;
    font-size: .88rem;
    color: var(--ink-2);
    margin-top: .2rem;
}

.stat-row b { font-size: 1.05rem; color: var(--ink); }

.empty-hint {
    color: var(--ink-3);
    font-size: .9rem;
    padding: 1.2rem 0;
    text-align: center;
}

/* ==========================================================================
   自适应 / 大屏
   ========================================================================== */

@media (min-width: 700px) {
    .grid { grid-template-columns: repeat(2, 1fr); }
    .admin-cols { grid-template-columns: 380px 1fr; }
    html { font-size: 16.5px; }
}

@media (min-width: 1080px) {
    .grid { grid-template-columns: repeat(3, 1fr); }
    html { font-size: 17px; }
    .wrap { padding: 1.15rem 1.4rem 2.2rem; }
    .admin-wrap { padding: 1.3rem 1.4rem 3rem; }
    .admin-cols { grid-template-columns: 420px 1fr; }
    .today-date { font-size: 1.55rem; }
}

/* 教室大屏 / 大分辨率显示器：字号继续放大，两行三列刚好铺满一屏 */
@media (min-width: 1500px) {
    html { font-size: 18px; }
    .topbar-in, .wrap, .admin-wrap { max-width: 1900px; }
}

@media (min-width: 1300px) and (min-height: 700px) {
    /* 大屏：六张卡把第一屏铺满（行高等分拉伸），填写/导出按钮被挤到首屏之下 */
    .grid { grid-template-columns: repeat(3, 1fr); grid-auto-rows: 1fr; min-height: calc(100vh - 150px); }
    .card { min-height: 0; }
    .card-body { display: flex; align-items: flex-start; }
    .content { font-size: 1.06rem; }
    .today-date { font-size: 1.6rem; }
}

@media (min-width: 1900px) {
    html { font-size: 20px; }
    .topbar-in, .wrap, .admin-wrap { max-width: 2300px; }
}

@media (min-width: 2400px) {
    html { font-size: 23px; }
    .topbar-in, .wrap, .admin-wrap { max-width: 2800px; }
}

/* 手机上的紧凑处理 */
@media (max-width: 560px) {
    .topbar-in { padding: .65rem .8rem .75rem; }
    .today-date { font-size: 1.18rem; }
    .today-meta { font-size: .84rem; }
    .brand { font-size: 1.15rem; }
    .today-line { font-size: .88rem; width: 100%; }
    .wrap { padding: .85rem .8rem 1.6rem; }
    .grid { gap: .7rem; }
    .btn.big { padding: .75rem 1.6rem; font-size: 1.05rem; }
    .page-actions { gap: .6rem; margin-top: 1.4rem; padding-top: 1.2rem; }
    .page-actions .btn { flex: 1 1 44%; }
    .modal-box { padding: 1.1rem 1rem 1rem; }
    .chips { grid-template-columns: repeat(3, 1fr); }
}

/* 打印（浏览器里 Ctrl+P 也能得到一张干净的表） */
@media print {
    .page-actions, .topbar-actions, .toast, .modal { display: none !important; }
    .topbar { position: static; border-bottom: 1px solid #ddd; }
    body { background: #fff; }
    .card { break-inside: avoid; box-shadow: none; min-height: 0 !important; }
    .grid { padding: 0; border-radius: 0; box-shadow: none; }
    .grid { grid-template-columns: repeat(2, 1fr) !important; }
    .wrap { padding: 0; max-width: none; }
}