/* ================= 基础 ================= */
* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
:root {
  --bg: #f2f4f8;
  --card: #ffffff;
  --line: #e3e8ef;
  --text: #1f2937;
  --sub: #6b7280;
  --primary: #2563eb;
  --ok: #16a34a;      /* 正常 绿 */
  --leave: #dc2626;   /* 请假 红 */
  --late: #d97706;    /* 迟到 橙 */
  --early: #2563eb;   /* 早退 蓝 */
  --radius: 14px;
}
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 15px;
  line-height: 1.5;
}

/* ================= 顶栏 ================= */
#topbar {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; gap: 10px;
  padding: 10px 14px;
  background: var(--card);
  border-bottom: 1px solid var(--line);
}
.brand { font-weight: 700; font-size: 16px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 38vw; }
#nav { display: flex; gap: 4px; margin-left: auto; }
#nav a {
  text-decoration: none; color: var(--sub);
  padding: 6px 12px; border-radius: 999px; font-size: 14px;
}
#nav a.active { background: var(--primary); color: #fff; font-weight: 600; }
.sync-dot { width: 10px; height: 10px; border-radius: 50%; background: #d1d5db; flex: none; }
.sync-dot.on { background: var(--ok); }
.sync-dot.off { background: var(--late); }

main { max-width: 1000px; margin: 0 auto; padding: 12px 12px 40px; }

/* ================= 卡片与按钮 ================= */
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px;
  margin-bottom: 12px;
}
h3 { margin: 0 0 10px; font-size: 15px; }
.btn {
  border: 1px solid var(--line); background: var(--card); color: var(--text);
  border-radius: 10px; padding: 8px 14px; font-size: 14px; cursor: pointer;
}
.btn:active { transform: scale(.97); }
.btn.primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn.danger { color: var(--leave); border-color: #f3c6c6; }
.btn.small { padding: 4px 10px; font-size: 13px; }
.btn:disabled { opacity: .5; }

/* ================= 日期栏 ================= */
.datebar { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.datebar .dnav { width: 38px; height: 38px; border-radius: 10px; border: 1px solid var(--line); background: var(--card); font-size: 18px; cursor: pointer; }
.datebar input[type="date"] {
  border: 1px solid var(--line); border-radius: 10px; padding: 8px 10px; font-size: 15px; flex: 1; min-width: 150px;
}
.weekday { color: var(--sub); font-size: 13px; }

/* ================= 节次页签 ================= */
.period-tabs { display: flex; gap: 6px; overflow-x: auto; padding: 2px 0 10px; -webkit-overflow-scrolling: touch; }
.ptab {
  flex: none; border: 1px solid var(--line); background: var(--card); border-radius: 10px;
  padding: 8px 12px; font-size: 14px; cursor: pointer; position: relative;
}
.ptab.active { background: var(--primary); color: #fff; border-color: var(--primary); font-weight: 600; }
.ptab .dot { position: absolute; top: -4px; right: -4px; width: 10px; height: 10px; border-radius: 50%; background: var(--leave); border: 2px solid var(--bg); }

/* ================= 汇总条 ================= */
.summary { display: flex; flex-wrap: wrap; gap: 8px; }
.sum { flex: 1; min-width: 70px; text-align: center; padding: 6px 2px; border-radius: 10px; background: #f8fafc; }
.sum b { display: block; font-size: 18px; }
.sum .lab { font-size: 12px; color: var(--sub); }
.sum.c-ok b { color: var(--ok); }
.sum.c-leave b { color: var(--leave); }
.sum.c-late b { color: var(--late); }
.sum.c-early b { color: var(--early); }
.sum.c-present b { color: var(--primary); }

.toolbar { display: flex; gap: 8px; margin-bottom: 12px; flex-wrap: wrap; }

/* ================= 学生网格 ================= */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(96px, 1fr)); gap: 8px; margin-bottom: 12px; }
.chip {
  border: 1px solid var(--line); background: var(--card); border-radius: 12px;
  padding: 8px 6px; text-align: center; cursor: pointer; user-select: none;
  transition: transform .08s;
}
.chip:active { transform: scale(.95); }
.chip .c-seat { display: block; font-size: 11px; color: var(--sub); }
.chip .c-name { display: block; font-size: 15px; font-weight: 600; }
.chip.st-leave { background: #fef2f2; border-color: #fecaca; }
.chip.st-leave .c-name { color: var(--leave); }
.chip.st-late { background: #fffbeb; border-color: #fde68a; }
.chip.st-late .c-name { color: var(--late); }
.chip.st-early { background: #eff6ff; border-color: #bfdbfe; }
.chip.st-early .c-name { color: var(--early); }
.chip .c-note-dot { position: absolute; }
.chip { position: relative; }
.chip.has-note::after {
  content: "✎"; position: absolute; top: 2px; right: 5px; font-size: 10px; color: var(--sub);
}
.hint { color: var(--sub); font-size: 13px; margin: 8px 2px; }

/* ================= 记录列表 ================= */
.rec-row {
  display: flex; align-items: center; gap: 10px; padding: 8px 4px;
  border-bottom: 1px dashed var(--line); font-size: 14px;
}
.rec-row:last-child { border-bottom: none; }
.rec-seat { width: 34px; color: var(--sub); font-size: 13px; }
.rec-name { font-weight: 600; }
.badge {
  font-size: 12px; border-radius: 6px; padding: 2px 8px; color: #fff; flex: none;
}
.badge.b-leave { background: var(--leave); }
.badge.b-late { background: var(--late); }
.badge.b-early { background: var(--early); }
.rec-note { color: var(--sub); font-size: 13px; flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.rec-ops { display: flex; gap: 6px; }
.rec-ops button { border: 1px solid var(--line); background: var(--card); border-radius: 8px; width: 30px; height: 30px; cursor: pointer; font-size: 14px; }

/* ================= 表格 ================= */
.tbl-wrap { overflow-x: auto; }
table.tbl { width: 100%; border-collapse: collapse; font-size: 14px; }
.tbl th, .tbl td { padding: 8px 8px; text-align: center; border-bottom: 1px solid var(--line); white-space: nowrap; }
.tbl th { background: #f8fafc; color: var(--sub); font-weight: 600; }
.tbl td.l, .tbl th.l { text-align: left; }
.tbl .num-leave { color: var(--leave); font-weight: 600; }
.tbl .num-late { color: var(--late); font-weight: 600; }
.tbl .num-early { color: var(--early); font-weight: 600; }
.tbl .num-total { font-weight: 700; }

/* ================= 统计 ================= */
.mode-tabs { display: flex; gap: 8px; margin-bottom: 12px; }
.mtab {
  flex: 1; padding: 10px; text-align: center; border: 1px solid var(--line); border-radius: 12px;
  background: var(--card); cursor: pointer; font-size: 15px;
}
.mtab.active { background: var(--primary); color: #fff; border-color: var(--primary); font-weight: 600; }
.stats-cards { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 12px; }
.st-card { flex: 1; min-width: 90px; text-align: center; padding: 10px; border-radius: 12px; background: var(--card); border: 1px solid var(--line); }
.st-card b { display: block; font-size: 22px; }
.st-card .lab { font-size: 12px; color: var(--sub); }
.st-card.sc-leave b { color: var(--leave); }
.st-card.sc-late b { color: var(--late); }
.st-card.sc-early b { color: var(--early); }
.st-card.sc-all b { color: var(--primary); }

/* ================= 大屏 ================= */
body.view-screen #topbar { display: none; }
body.view-screen main { max-width: none; padding: 0; margin: 0; }
.screen {
  min-height: 100vh; background: #0f172a; color: #f8fafc;
  padding: 26px 34px; display: flex; flex-direction: column; gap: 18px;
}
.s-head { display: flex; align-items: baseline; gap: 20px; flex-wrap: wrap; }
.s-class { font-size: 34px; font-weight: 800; }
.s-date { font-size: 20px; color: #cbd5e1; }
.s-clock { margin-left: auto; font-size: 40px; font-weight: 700; font-variant-numeric: tabular-nums; color: #93c5fd; }
.s-grid { display: flex; flex-direction: column; gap: 12px; flex: 1; }
.s-row {
  display: flex; align-items: center; gap: 18px; padding: 14px 20px;
  background: #1e293b; border-radius: 16px; border: 2px solid transparent;
}
.s-row.cur { border-color: #fbbf24; background: #1c2a3f; }
.s-row .s-p { width: 150px; flex: none; }
.s-row .s-p .pn { font-size: 24px; font-weight: 700; }
.s-row .s-p .pt { font-size: 14px; color: #94a3b8; }
.s-row .s-cur-tag { display: none; }
.s-row.cur .s-cur-tag {
  display: inline-block; background: #fbbf24; color: #1f2937; font-size: 12px;
  border-radius: 6px; padding: 1px 8px; margin-top: 4px; font-weight: 700;
}
.s-nums { display: flex; flex-wrap: wrap; gap: 14px; margin-left: auto; }
.s-nums .sn { text-align: center; min-width: 84px; }
.s-nums .sn .lab { font-size: 14px; color: #94a3b8; }
.s-nums .sn b { font-size: 34px; font-weight: 800; font-variant-numeric: tabular-nums; }
.sn.e-ok b { color: #4ade80; }
.sn.e-present b { color: #93c5fd; }
.sn.e-leave b { color: #f87171; }
.sn.e-late b { color: #fbbf24; }
.sn.e-early b { color: #60a5fa; }
.s-foot { color: #64748b; font-size: 14px; text-align: center; }
.s-full {
  position: fixed; right: 16px; bottom: 16px; background: #334155; color: #e2e8f0;
  border: none; border-radius: 10px; padding: 10px 16px; font-size: 14px; cursor: pointer; z-index: 10;
}

/* ================= 设置 ================= */
.stabs { display: flex; gap: 6px; overflow-x: auto; margin-bottom: 12px; }
.stab {
  flex: none; border: 1px solid var(--line); background: var(--card); border-radius: 999px;
  padding: 7px 14px; font-size: 14px; cursor: pointer;
}
.stab.active { background: var(--primary); color: #fff; border-color: var(--primary); font-weight: 600; }
.field { margin-bottom: 12px; }
.field label { display: block; font-size: 13px; color: var(--sub); margin-bottom: 5px; }
.field input[type="text"], .field input[type="password"], .field input[type="date"], .field textarea, .field select {
  width: 100%; border: 1px solid var(--line); border-radius: 10px; padding: 9px 10px; font-size: 14px; font-family: inherit;
}
.field textarea { min-height: 140px; resize: vertical; font-size: 13px; line-height: 1.7; }
.roster-list { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.rchip {
  display: inline-flex; align-items: center; gap: 6px; border: 1px solid var(--line);
  background: #f8fafc; border-radius: 999px; padding: 4px 6px 4px 10px; font-size: 13px;
}
.rchip button { border: none; background: none; color: var(--sub); cursor: pointer; font-size: 14px; padding: 0 2px; }
.rchip button:hover { color: var(--leave); }

/* 课表矩阵 */
.sched-scroll { overflow-x: auto; }
table.matrix { border-collapse: collapse; font-size: 13px; }
.matrix th, .matrix td { border: 1px solid var(--line); padding: 5px 6px; text-align: center; }
.matrix input[type="text"], .matrix input[type="number"], .matrix input[type="time"] {
  width: 86px; border: 1px solid var(--line); border-radius: 6px; padding: 5px 4px; font-size: 13px;
}
.matrix select { border: 1px solid var(--line); border-radius: 6px; padding: 5px; }
.matrix .row-lab { background: #f8fafc; font-weight: 600; white-space: nowrap; }
.matrix .col-0 { position: sticky; left: 0; background: #fff; z-index: 1; }
.sem-row { display: flex; align-items: center; gap: 10px; padding: 8px 0; border-bottom: 1px dashed var(--line); font-size: 14px; }
.sem-row:last-child { border-bottom: none; }
.sem-row .sem-info { flex: 1; }
.sem-row .sem-info .n { font-weight: 600; }
.sem-row .sem-info .d { color: var(--sub); font-size: 13px; }

/* ================= 弹窗 ================= */
.modal {
  position: fixed; inset: 0; background: rgba(15, 23, 42, .55); z-index: 100;
  display: flex; align-items: center; justify-content: center; padding: 20px;
}
.modal-box { background: #fff; border-radius: 16px; padding: 18px; width: 100%; max-width: 420px; max-height: 86vh; overflow-y: auto; }
.modal-box h3 { margin-bottom: 14px; }
.type-row { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 12px; }
.type-row label {
  flex: 1; min-width: 70px; text-align: center; border: 1px solid var(--line); border-radius: 10px;
  padding: 10px 4px; cursor: pointer; font-size: 14px;
}
.type-row input { display: none; }
.type-row label.checked { border-width: 2px; font-weight: 700; }
.type-row label.t-normal.checked { border-color: var(--ok); color: var(--ok); background: #f0fdf4; }
.type-row label.t-leave.checked { border-color: var(--leave); color: var(--leave); background: #fef2f2; }
.type-row label.t-late.checked { border-color: var(--late); color: var(--late); background: #fffbeb; }
.type-row label.t-early.checked { border-color: var(--early); color: var(--early); background: #eff6ff; }
.modal-box textarea {
  width: 100%; border: 1px solid var(--line); border-radius: 10px; padding: 9px 10px;
  font-size: 14px; font-family: inherit; min-height: 70px; resize: vertical;
}
.modal-actions { display: flex; gap: 10px; margin-top: 14px; }
.modal-actions .btn { flex: 1; padding: 10px; font-size: 15px; }

/* ================= Toast ================= */
#toast {
  position: fixed; left: 50%; bottom: 30px; transform: translateX(-50%);
  background: #111827; color: #fff; padding: 10px 18px; border-radius: 10px;
  font-size: 14px; z-index: 200; opacity: 0; transition: opacity .25s; pointer-events: none;
  max-width: 86vw; text-align: center;
}
#toast.show { opacity: .95; }

/* ================= 空状态 ================= */
.empty { text-align: center; color: var(--sub); padding: 40px 10px; }
.empty .big { font-size: 40px; margin-bottom: 10px; }
.empty a { color: var(--primary); }

/* ================= 响应式 ================= */
@media (max-width: 600px) {
  main { padding: 10px 8px 60px; }
  .grid { grid-template-columns: repeat(auto-fill, minmax(80px, 1fr)); gap: 6px; }
  .chip .c-name { font-size: 14px; }
  .s-nums .sn { min-width: 62px; }
  .s-nums .sn b { font-size: 26px; }
  .s-row .s-p { width: 96px; }
  .s-row .s-p .pn { font-size: 18px; }
  .s-class { font-size: 24px; }
  .s-clock { font-size: 28px; }
  .screen { padding: 16px 14px; }
  .brand { max-width: 30vw; }
}