:root {
  --primary: #1f6feb;
  --primary-light: #e8f0fe;
  --success: #16a34a;
  --success-light: #dcfce7;
  --danger: #dc2626;
  --danger-light: #fee2e2;
  --warning: #ea580c;
  --text: #1f2937;
  --sub: #6b7280;
  --bg: #f2f5fa;
  --border: #e5e7eb;
  --card: #fff;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  font-size: 15px;
  line-height: 1.6;
  padding-bottom: 40px;
}

a { color: var(--primary); text-decoration: none; }

.wrap { max-width: 980px; margin: 0 auto; padding: 16px; }
.wrap-narrow { max-width: 460px; margin: 0 auto; padding: 40px 16px; }

/* 顶部导航 */
.navbar {
  background: linear-gradient(135deg, #1f6feb, #3b82f6);
  color: #fff;
  padding: 14px 16px;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.navbar .brand { font-weight: 700; font-size: 17px; margin-right: auto; }
.navbar a { color: #fff; opacity: .92; font-size: 14px; }
.navbar a:hover { opacity: 1; text-decoration: underline; }
.navbar .who { font-size: 13px; opacity: .9; }

.card {
  background: var(--card);
  border-radius: 14px;
  padding: 18px;
  margin-bottom: 16px;
  box-shadow: 0 2px 10px rgba(15, 23, 42, .05);
}

h1 { font-size: 22px; margin: 0 0 6px; }
h2 { font-size: 18px; margin: 0 0 12px; }
.sub { color: var(--sub); font-size: 13px; }
.muted { color: var(--sub); }
.row { display: flex; gap: 12px; align-items: center; }
.row-between { display: flex; gap: 12px; align-items: center; justify-content: space-between; flex-wrap: wrap; }
.grow { flex: 1; }

/* 表单 */
label.field { display: block; margin-bottom: 14px; }
label.field span { display: block; font-size: 13px; color: var(--sub); margin-bottom: 6px; }
input, select, textarea {
  width: 100%;
  padding: 11px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 15px;
  font-family: inherit;
  background: #f9fafb;
  color: var(--text);
}
textarea { min-height: 150px; resize: vertical; }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--primary-light); border-color: var(--primary); }

button, .btn {
  display: inline-block;
  border: none;
  border-radius: 10px;
  padding: 11px 20px;
  font-size: 15px;
  font-family: inherit;
  background: var(--primary);
  color: #fff;
  cursor: pointer;
}
button:hover, .btn:hover { filter: brightness(1.05); }
button:disabled { opacity: .6; cursor: not-allowed; }
.btn-secondary { background: var(--primary-light); color: var(--primary); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-ghost { background: #eef1f6; color: var(--text); }
.btn-sm { padding: 6px 12px; font-size: 13px; }
.btn-block { width: 100%; }

/* 标签 / 提示 */
.tag { display: inline-block; padding: 2px 10px; border-radius: 999px; font-size: 12px; }
.tag-add { background: var(--success-light); color: var(--success); }
.tag-minus { background: var(--danger-light); color: var(--danger); }
.tag-on { background: var(--success-light); color: var(--success); }
.tag-off { background: #eef1f6; color: var(--sub); }
.role-admin { background: #f59e0b; color: #fff; }
.role-teacher { background: #16a34a; color: #fff; }
.role-representative { background: #0ea5e9; color: #fff; }
.role-student { background: #6b7280; color: #fff; }

.banner {
  background: var(--primary-light);
  color: var(--primary);
  padding: 10px 14px;
  border-radius: 10px;
  font-size: 13px;
  margin-bottom: 14px;
}
.banner-warn { background: #fff7ed; color: var(--warning); }

/* 排名表 */
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { padding: 10px 8px; border-bottom: 1px solid var(--border); text-align: left; }
th { color: var(--sub); font-weight: 600; font-size: 13px; background: #f8fafc; }
td.num, th.num { text-align: right; }
tr.clickable { cursor: pointer; }
tr.clickable:hover { background: #f8fbff; }

/* 滚动表格（用于导出预览） */
.scroll-x { overflow-x: auto; }
.scroll-x table { min-width: 640px; }

/* 标签页 */
.tabs { display: flex; gap: 8px; margin-bottom: 14px; flex-wrap: wrap; }
.tab {
  padding: 8px 16px;
  border-radius: 999px;
  background: #fff;
  color: var(--sub);
  cursor: pointer;
  font-size: 14px;
  box-shadow: 0 1px 4px rgba(15, 23, 42, .05);
}
.tab.active { background: var(--primary); color: #fff; }

/* 打分页 */
.chips { display: flex; flex-wrap: wrap; gap: 10px; }
.chip {
  padding: 9px 18px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid var(--border);
  cursor: pointer;
  font-size: 14px;
}
.chip.active { background: var(--primary); border-color: var(--primary); color: #fff; }

.items { display: flex; flex-wrap: wrap; gap: 10px; }
.item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: 12px;
  background: #f6f8fc;
  border: 1px solid transparent;
  cursor: pointer;
  font-size: 14px;
}
.item.active { background: var(--primary-light); border-color: var(--primary); }
.item .pts { color: var(--sub); font-size: 13px; }
.item input.pts-input {
  width: 74px;
  padding: 6px 8px;
  text-align: center;
  border: 1px solid var(--primary);
  border-radius: 8px;
  background: #fff;
  color: var(--primary);
  font-size: 14px;
}

.students { display: flex; flex-wrap: wrap; gap: 10px; }
.student {
  padding: 9px 16px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid var(--border);
  cursor: pointer;
  font-size: 14px;
}
.student.active { background: var(--success); border-color: var(--success); color: #fff; }

/* 明细 */
.rec { padding: 12px 0; border-bottom: 1px solid var(--border); display: flex; gap: 12px; align-items: flex-start; }
.rec:last-child { border-bottom: none; }
.rec .main { flex: 1; }
.rec .title { font-weight: 600; }
.rec .meta { font-size: 13px; color: var(--sub); }
.rec .scorer { font-size: 13px; color: var(--primary); }
.rec .remark { font-size: 13px; color: var(--warning); }
.rec .points { font-weight: 700; font-size: 17px; }
.rec .points.add { color: var(--success); }
.rec .points.minus { color: var(--danger); }

/* 概览 */
.overview { display: flex; gap: 10px; flex-wrap: wrap; }
.ov {
  flex: 1;
  min-width: 90px;
  background: #fff;
  border-radius: 12px;
  padding: 14px;
  text-align: center;
}
.ov .num { font-size: 22px; font-weight: 700; }
.ov .label { font-size: 12px; color: var(--sub); }

/* 列表行 */
.list-row { display: flex; gap: 12px; align-items: center; justify-content: space-between; padding: 12px 0; border-bottom: 1px solid var(--border); flex-wrap: wrap; }
.list-row:last-child { border-bottom: none; }
.list-row .name { font-weight: 600; }
.list-row .sub2 { font-size: 13px; color: var(--sub); }
.actions { display: flex; gap: 8px; flex-wrap: wrap; }

/* 提示条 */
#toast {
  position: fixed;
  left: 50%;
  bottom: 40px;
  transform: translateX(-50%);
  background: rgba(17, 24, 39, .92);
  color: #fff;
  padding: 10px 20px;
  border-radius: 999px;
  font-size: 14px;
  opacity: 0;
  transition: opacity .2s;
  pointer-events: none;
  z-index: 99;
  max-width: 80vw;
}
#toast.show { opacity: 1; }

/* 弹层 */
.mask {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, .5);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 100;
}
.mask.hidden { display: none; }
.dialog { background: #fff; border-radius: 14px; padding: 22px; width: 100%; max-width: 420px; }

.grid-check { display: flex; flex-wrap: wrap; gap: 10px; margin: 10px 0 16px; }
.grid-check .chip.active { background: var(--primary); color: #fff; }

.empty { text-align: center; color: var(--sub); padding: 30px 0; }
.footer-note { text-align: center; color: var(--sub); font-size: 12px; margin-top: 24px; }

@media (max-width: 560px) {
  .wrap { padding: 12px; }
  .card { padding: 14px; }
  .navbar .brand { width: 100%; margin-bottom: 4px; }
}