:root {
  --blue: #3b82f6;
  --blue-soft: #dbeafe;
  --pink: #ec4899;
  --pink-soft: #fce7f3;
  --both: #a855f7;
  --both-soft: #f3e8ff;
  --free: #f1f5f9;
  --ink: #1f2937;
  --muted: #6b7280;
  --line: #e5e7eb;
  --bg: #f6f7fb;
  --card: #ffffff;
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--ink);
  font-size: 14px;
  line-height: 1.5;
  max-width: 540px;
  margin: 0 auto;
  padding-bottom: 32px;
}

.topbar {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 16px;
  background: linear-gradient(120deg, var(--blue), var(--pink));
  color: #fff;
  box-shadow: 0 2px 8px rgba(0,0,0,.08);
}
.topbar .title { font-weight: 700; font-size: 16px; }
.room { display: flex; align-items: center; gap: 8px; }
.room-id { font-size: 12px; opacity: .9; letter-spacing: .5px; }

.card {
  background: var(--card);
  margin: 12px;
  border-radius: 14px;
  padding: 14px;
  box-shadow: 0 1px 4px rgba(0,0,0,.05);
}
.card-head {
  display: flex; align-items: center; justify-content: space-between;
  font-weight: 600; margin-bottom: 12px; font-size: 15px;
}

/* 按钮 */
button { font-family: inherit; cursor: pointer; border: none; }
.btn-primary {
  background: linear-gradient(120deg, var(--blue), var(--pink));
  color: #fff; border-radius: 10px; padding: 10px 16px; font-weight: 600;
}
.btn-primary:disabled { opacity: .5; cursor: not-allowed; }
.btn-ghost { background: #f3f4f6; color: var(--ink); border-radius: 10px; padding: 10px 16px; }
.btn-mini { background: rgba(255,255,255,.25); color: #fff; border-radius: 8px; padding: 4px 10px; font-size: 12px; }
.card .btn-mini { background: var(--blue-soft); color: var(--blue); }
.btn-mini2 { background: #eef2ff; color: var(--both); border-radius: 8px; padding: 6px 10px; font-size: 12px; font-weight: 600; }
.btn-icon {
  background: #f1f5f9; color: var(--ink); border-radius: 8px;
  width: 32px; height: 32px; font-size: 18px; line-height: 1; display: inline-flex;
  align-items: center; justify-content: center;
}
.file-btn {
  display: inline-block; background: #eef2ff; color: var(--blue);
  border-radius: 10px; padding: 10px 16px; font-weight: 600;
}

.hint { color: var(--muted); font-size: 12px; margin: 10px 0 0; }
.hint-inline { color: var(--muted); font-size: 11px; }

/* 角色选择 */
.role-pick { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-bottom: 12px; }
.role-label { color: var(--muted); font-size: 13px; }
.seg { display: inline-flex; background: #f1f5f9; border-radius: 10px; padding: 3px; }
.seg-btn {
  border-radius: 8px; padding: 7px 14px; background: transparent; color: var(--muted); font-weight: 600; font-size: 13px;
}
.seg-btn.active { color: #fff; }
.seg-btn.blue.active { background: var(--blue); }
.seg-btn.pink.active { background: var(--pink); }

/* 开学日期 */
.date-set { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-bottom: 12px; font-size: 13px; color: var(--muted); }
.date-set input[type="date"] {
  border: 1px solid var(--line); border-radius: 8px; padding: 6px 8px; font-family: inherit; font-size: 13px; color: var(--ink);
}

.upload-row { display: flex; gap: 10px; align-items: center; }

/* 可编辑表格 */
.table-wrap { overflow-x: auto; }
.edit-table { width: 100%; border-collapse: collapse; font-size: 12px; min-width: 560px; }
.edit-table th, .edit-table td { border: 1px solid var(--line); padding: 6px 3px; text-align: center; }
.edit-table input, .edit-table select {
  width: 100%; border: none; background: transparent; font-family: inherit; font-size: 12px; text-align: center;
}
.edit-table input:focus, .edit-table select:focus { outline: 1px solid var(--blue); border-radius: 4px; }
.row-del { color: #fff; background: #ef4444; font-size: 13px; border-radius: 6px;
  width: 26px; height: 26px; display: inline-flex; align-items: center; justify-content: center; }
.head-actions { display: flex; gap: 6px; }
.btn-mini.danger { background: #fee2e2; color: #dc2626; }
/* 删除列固定在最左，横向滑动时也一直可见（手机窄屏关键） */
.edit-table th.th-del, .edit-table td.td-del {
  position: sticky; left: 0; z-index: 2; width: 38px; min-width: 38px; padding: 4px 2px;
}
.edit-table th.th-del { background: #f8fafc; font-weight: 600; }
.edit-table td.td-del { background: #fff; box-shadow: 2px 0 4px -2px rgba(15, 23, 42, .12); }
.edit-table .empty-row { color: var(--muted); font-size: 12px; padding: 14px 6px; }
.shift-row { display: flex; align-items: center; flex-wrap: wrap; gap: 6px; margin-top: 8px; font-size: 12px; color: var(--muted); }
.shift-btn { background: #f1f5f9; color: var(--ink); border-radius: 6px; padding: 5px 8px; font-size: 12px; }
.preview-actions { display: flex; gap: 10px; margin-top: 12px; }

/* 合并课表 */
.toggles { display: flex; gap: 8px; }
.tg { font-size: 12px; display: inline-flex; align-items: center; gap: 3px; }
.tg.blue { color: var(--blue); }
.tg.pink { color: var(--pink); }

.date-bar { display: flex; align-items: center; gap: 6px; margin-bottom: 10px; }
.date-input {
  flex: 1; border: 1px solid var(--line); border-radius: 8px; padding: 7px 8px;
  font-family: inherit; font-size: 13px; color: var(--ink); background: #fff;
}

.week-info { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-bottom: 12px; }
.week-info .range { font-size: 12px; color: var(--muted); margin-right: auto; }
.badge { font-size: 11px; padding: 3px 8px; border-radius: 20px; font-weight: 600; color: #fff; }
.badge.blue { background: var(--blue); }
.badge.pink { background: var(--pink); }

.grid-wrap { overflow-x: auto; }
.schedule-grid {
  display: grid;
  grid-template-columns: 46px repeat(7, minmax(40px, 1fr));
  gap: 3px;
  min-width: 360px;
}
.cell {
  border-radius: 6px; padding: 4px 2px; min-height: 34px;
  font-size: 11px; text-align: center; display: flex; flex-direction: column;
  justify-content: center; align-items: center; overflow: hidden;
}
.cell.head { background: #f8fafc; color: var(--muted); font-weight: 600; }
.cell.head .date { font-weight: 400; font-size: 9px; opacity: .75; }
.cell.head.today { background: #ede9fe; color: var(--both); }
.cell.time { background: #f8fafc; color: var(--muted); font-size: 12px; font-weight: 600; }
.cell.empty { background: var(--free); color: #cbd5e1; }
.cell.blue { background: var(--blue-soft); color: #1d4ed8; border: 1px solid var(--blue); }
.cell.pink { background: var(--pink-soft); color: #be185d; border: 1px solid var(--pink); }
.cell.both { background: var(--both-soft); color: #7e22ce; border: 1px solid var(--both); }
.cell .cname { font-weight: 600; line-height: 1.15; word-break: break-all; }
.cell .cloc { font-size: 9px; opacity: .8; }

.legend { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 12px; font-size: 12px; color: var(--muted); }
.dot { display: inline-block; width: 10px; height: 10px; border-radius: 50%; margin-right: 4px; vertical-align: middle; }
.dot.blue { background: var(--blue); }
.dot.pink { background: var(--pink); }
.dot.both { background: var(--both); }
.dot.free { background: var(--free); border: 1px solid var(--line); }
.version { margin: 10px 0 0; font-size: 11px; color: #b6bfcc; text-align: center; }

.toast {
  position: fixed; left: 50%; bottom: 40px; transform: translateX(-50%);
  background: rgba(31,41,55,.92); color: #fff; padding: 10px 18px; border-radius: 20px;
  font-size: 13px; z-index: 50; max-width: 80%;
}