/* 班级积分系统 · 共用样式 —— 手机优先，无外部依赖 */
:root {
  --bg: #eef2f8;
  --card: #ffffff;
  --primary: #1f4e79;
  --primary-2: #2e7cc4;
  --line: #d6e0ee;
  --text: #1c2b3a;
  --muted: #6b7d92;
  --plus: #17914f;
  --plus-bg: #e6f6ec;
  --minus: #cf3a3a;
  --minus-bg: #fdeaea;
  --gold: #e8a90c;
  --silver: #93a1b3;
  --bronze: #c07a3e;
  --shadow: 0 2px 10px rgba(31, 78, 121, .08);
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

body {
  margin: 0;
  font-family: "等线", "微软雅黑", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.5;
  padding-bottom: 96px;
}

a { color: var(--primary-2); text-decoration: none; }

/* ---------------- 顶栏 ---------------- */
.topbar {
  position: sticky; top: 0; z-index: 30;
  background: linear-gradient(135deg, #1f4e79, #2e7cc4);
  color: #fff; padding: 10px 14px;
  display: flex; align-items: center; gap: 12px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, .18);
}
.topbar .cls { font-size: 18px; font-weight: 700; }
.topbar .clock { font-size: 13px; opacity: .85; }
.topbar .nav { margin-left: auto; display: flex; gap: 8px; }
.topbar .nav a {
  color: #fff; background: rgba(255, 255, 255, .18);
  padding: 6px 12px; border-radius: 999px; font-size: 14px; white-space: nowrap;
}
.topbar .nav a:hover { background: rgba(255, 255, 255, .32); }

/* ---------------- 布局 ---------------- */
.wrap { max-width: 1180px; margin: 0 auto; padding: 12px; }
.card {
  background: var(--card); border-radius: 12px; padding: 14px;
  box-shadow: var(--shadow); margin-bottom: 12px;
  border: 1px solid var(--line);
}
.card > h3 {
  margin: 0 0 10px; font-size: 15px; color: var(--primary);
  display: flex; align-items: center; gap: 8px;
}
.card > h3 .sub { font-weight: 400; color: var(--muted); font-size: 13px; }
.row { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.spacer { flex: 1; }

/* ---------------- 按钮 ---------------- */
.btn {
  border: 1px solid var(--line); background: #fff; color: var(--text);
  border-radius: 10px; padding: 10px 14px; font-size: 15px;
  cursor: pointer; min-height: 44px; font-family: inherit;
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  transition: transform .06s, background .15s, border-color .15s;
}
.btn:active { transform: scale(.97); }
.btn:hover { border-color: var(--primary-2); }
.btn.primary { background: var(--primary); color: #fff; border-color: var(--primary); font-weight: 600; }
.btn.primary:hover { background: #2a6396; }
.btn.ghost { background: #f6f9fd; }
.btn.small { min-height: 34px; padding: 5px 10px; font-size: 13px; border-radius: 8px; }
.btn.danger { color: var(--minus); border-color: #f0c4c4; }
.btn.danger:hover { background: var(--minus-bg); }
.btn:disabled { opacity: .45; cursor: not-allowed; }

/* ---------------- 学生网格 ---------------- */
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 10px; }
.chip {
  border: 1px solid var(--line); background: #f6f9fd; border-radius: 999px;
  padding: 6px 13px; font-size: 14px; cursor: pointer; user-select: none;
}
.chip.on { background: var(--primary); color: #fff; border-color: var(--primary); }
.chip .n { opacity: .7; font-size: 12px; }

.grid { display: grid; gap: 8px; }
.grid.stu { grid-template-columns: repeat(auto-fill, minmax(88px, 1fr)); }
.grid.cat { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }

.stu-btn {
  border: 1px solid var(--line); background: #fff; border-radius: 10px;
  padding: 12px 6px; font-size: 16px; cursor: pointer; text-align: center;
  min-height: 54px; font-family: inherit; position: relative; overflow: hidden;
}
.stu-btn .g { display: block; font-size: 11px; color: var(--muted); margin-top: 2px; }
.stu-btn .sc { position: absolute; top: 4px; right: 6px; font-size: 11px; color: var(--primary-2); font-weight: 700; }
.stu-btn.on { background: var(--primary); color: #fff; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(46, 124, 196, .25); }
.stu-btn.on .g, .stu-btn.on .sc { color: rgba(255, 255, 255, .8); }

.cat-group { margin-bottom: 12px; }
.cat-group > .name { font-size: 13px; color: var(--muted); margin: 6px 0; font-weight: 600; }
.cat-btn {
  border: 1px solid var(--line); background: #fff; border-radius: 10px;
  padding: 12px 10px; font-size: 15px; cursor: pointer; text-align: left;
  min-height: 52px; font-family: inherit; display: flex; align-items: center; gap: 8px;
}
.cat-btn .p { font-weight: 700; font-size: 17px; min-width: 40px; text-align: center; border-radius: 6px; padding: 2px 4px; }
.cat-btn.p-plus .p { color: var(--plus); background: var(--plus-bg); }
.cat-btn.p-minus .p { color: var(--minus); background: var(--minus-bg); }
.cat-btn.on { border-color: var(--primary-2); box-shadow: 0 0 0 3px rgba(46, 124, 196, .2); background: #f2f8ff; }

/* ---------------- 底部提交栏 ---------------- */
.submitbar {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 40;
  background: #fff; border-top: 1px solid var(--line);
  padding: 10px 14px calc(10px + env(safe-area-inset-bottom));
  display: flex; gap: 10px; align-items: center;
  box-shadow: 0 -3px 14px rgba(31, 78, 121, .1);
}
.submitbar .info { flex: 1; font-size: 14px; line-height: 1.35; }
.submitbar .info b { color: var(--primary); }
.submitbar .btn.big { min-height: 52px; padding: 0 22px; font-size: 17px; }

/* ---------------- 表格 ---------------- */
table { width: 100%; border-collapse: collapse; font-size: 15px; }
th, td { padding: 9px 8px; border-bottom: 1px solid var(--line); text-align: center; }
th { background: #f2f7fd; color: var(--primary); font-size: 13px; position: sticky; top: 0; }
td.name, th.name { text-align: left; }
tr.r1 td { background: #fff9e6; font-weight: 700; }
tr.r2 td { background: #f5f7fa; font-weight: 600; }
tr.r3 td { background: #fdf4ec; font-weight: 600; }
.medal { display: inline-block; min-width: 26px; height: 26px; line-height: 26px; border-radius: 50%; color: #fff; font-size: 13px; font-weight: 700; }
.medal.m1 { background: var(--gold); }
.medal.m2 { background: var(--silver); }
.medal.m3 { background: var(--bronze); }
.medal.mx { background: #c8d4e2; color: #4a5b6e; }
.pos { color: var(--plus); font-weight: 700; }
.neg { color: var(--minus); font-weight: 700; }
.muted { color: var(--muted); font-size: 13px; }
.tag { display: inline-block; padding: 1px 7px; border-radius: 6px; background: #eaf1fa; color: var(--primary); font-size: 12px; }
.tag.grp { background: #efe7fb; color: #6b3fa0; }

/* ---------------- 输入 ---------------- */
input[type=text], input[type=number], input[type=date], select, textarea {
  font-family: inherit; font-size: 15px; padding: 9px 10px;
  border: 1px solid var(--line); border-radius: 9px; background: #fff; color: var(--text);
  width: 100%;
}
textarea { min-height: 120px; line-height: 1.6; }
label.f { display: block; font-size: 13px; color: var(--muted); margin: 8px 0 4px; }

/* ---------------- 提示 ---------------- */
.toast {
  position: fixed; left: 50%; bottom: 110px; transform: translateX(-50%) translateY(20px);
  background: #16324d; color: #fff; padding: 11px 20px; border-radius: 999px;
  font-size: 15px; opacity: 0; transition: all .22s; z-index: 60; pointer-events: none;
  max-width: 90vw; text-align: center; box-shadow: 0 6px 20px rgba(0, 0, 0, .25);
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast.bad { background: #8f2020; }
.toast.good { background: #16794a; }

.empty { text-align: center; color: var(--muted); padding: 28px 10px; font-size: 15px; }
.empty .btn { margin-top: 12px; }

.tabs { display: flex; gap: 6px; margin-bottom: 12px; flex-wrap: wrap; }
.tabs .t {
  border: 1px solid var(--line); background: #fff; border-radius: 999px;
  padding: 7px 16px; cursor: pointer; font-size: 14px;
}
.tabs .t.on { background: var(--primary); color: #fff; border-color: var(--primary); }

.rec-list { display: flex; flex-direction: column; gap: 6px; max-height: 320px; overflow: auto; }
.rec {
  display: flex; align-items: center; gap: 8px; padding: 7px 10px;
  border: 1px solid var(--line); border-radius: 9px; font-size: 14px; background: #fbfdff;
}
.rec .who { font-weight: 600; min-width: 72px; }
.rec .cat { flex: 1; color: var(--muted); }
.rec .pt { font-weight: 700; min-width: 40px; text-align: right; }
.rec.off { opacity: .5; text-decoration: line-through; }

.hint { background: #fff8e6; border: 1px solid #f0dfae; border-radius: 10px; padding: 10px 12px; font-size: 14px; color: #7a5c10; margin-bottom: 12px; }
.ok-hint { background: #eafaf1; border-color: #b6e2c8; color: #14663c; }

@media (max-width: 620px) {
  body { font-size: 15px; }
  .grid.stu { grid-template-columns: repeat(auto-fill, minmax(76px, 1fr)); }
  .grid.cat { grid-template-columns: 1fr 1fr; }
  .topbar .nav a { padding: 6px 9px; font-size: 13px; }
  th, td { padding: 7px 5px; font-size: 14px; }
}