:root {
  --bg: #f3f6f4;
  --panel: #ffffff;
  --ink: #1c2b24;
  --muted: #5b6b63;
  --line: #d7e2dc;
  --brand: #1f7a5c;
  --brand-2: #16634a;
  --warn: #b45309;
  --danger: #b42318;
  --chip: #e8f4ee;
  --shadow: 0 10px 30px rgba(28, 43, 36, 0.08);
  --radius: 16px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", sans-serif;
  background:
    radial-gradient(900px 420px at 8% -10%, #d9efe4 0%, transparent 55%),
    radial-gradient(700px 360px at 100% 0%, #e7eef6 0%, transparent 50%),
    var(--bg);
  color: var(--ink);
  min-height: 100vh;
}

.topbar {
  max-width: 1280px;
  margin: 0 auto;
  padding: 28px 24px 8px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}
.brand { display: flex; gap: 14px; align-items: center; }
.brand-mark {
  width: 48px; height: 48px; border-radius: 14px;
  background: linear-gradient(160deg, #2ea87a, #16634a);
  color: #fff; display: grid; place-items: center;
  font-weight: 700; font-size: 22px;
}
.brand h1 { margin: 0; font-size: 24px; letter-spacing: 0.02em; }
.brand p { margin: 4px 0 0; color: var(--muted); font-size: 13px; }
.top-actions { display: flex; gap: 8px; }

.layout {
  max-width: 1280px;
  margin: 0 auto;
  padding: 16px 24px 40px;
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 18px;
  align-items: start;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
}
.form-panel h2, .chart-block h2, .subject-box h3 {
  margin: 0 0 14px;
  font-size: 16px;
}
label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: var(--muted); }
input, select, textarea {
  font: inherit; color: var(--ink);
  border: 1px solid var(--line); border-radius: 10px;
  padding: 9px 11px; background: #fff;
}
input:focus, select:focus, textarea:focus {
  outline: 2px solid #b7e0cc; border-color: var(--brand);
}
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.score-fields {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 10px;
}
.form-actions { display: flex; gap: 8px; margin-top: 14px; }
.error { color: var(--danger); font-size: 13px; margin: 10px 0 0; }

.btn {
  border: 0; border-radius: 10px; padding: 9px 14px;
  cursor: pointer; font: inherit; font-weight: 600;
}
.btn-primary { background: var(--brand); color: #fff; }
.btn-primary:hover { background: var(--brand-2); }
.btn-ghost { background: #eef3f0; color: var(--ink); }
.btn-danger-ghost { background: #fdecec; color: var(--danger); }
.btn-small { padding: 8px 12px; background: var(--chip); color: var(--brand-2); }
.btn-link {
  background: transparent; color: var(--brand); padding: 0 6px; font-weight: 600;
}
.btn-link.danger { color: var(--danger); }

.subject-box { margin-top: 22px; padding-top: 16px; border-top: 1px dashed var(--line); }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 10px; }
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--chip); color: var(--brand-2);
  border-radius: 999px; padding: 5px 10px; font-size: 13px;
}
.chip button {
  border: 0; background: transparent; cursor: pointer;
  color: var(--muted); font-size: 14px; line-height: 1;
}
.add-subject { display: flex; gap: 8px; }
.add-subject input { flex: 1; }

.batch-box { margin-top: 18px; }
.batch-box summary { cursor: pointer; font-weight: 600; }
.hint { color: var(--muted); font-size: 12px; line-height: 1.5; }
#batch-text { width: 100%; margin: 8px 0; resize: vertical; }

.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin-bottom: 16px;
}
.stat-card {
  background: #f7fbf8;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px;
}
.stat-card .k { font-size: 12px; color: var(--muted); }
.stat-card .v { font-size: 22px; font-weight: 700; margin-top: 4px; }
.stat-card .v.good { color: var(--brand); }
.stat-card .v.warn { color: var(--warn); }

.toolbar {
  display: flex; flex-wrap: wrap; gap: 12px; align-items: end;
  margin-bottom: 12px;
}
.toolbar label { min-width: 160px; }
.count-badge {
  margin-left: auto;
  background: var(--chip);
  color: var(--brand-2);
  border-radius: 999px;
  padding: 6px 12px;
  font-size: 13px;
  font-weight: 700;
}

.table-wrap { overflow: auto; border: 1px solid var(--line); border-radius: 12px; }
table { width: 100%; border-collapse: collapse; min-width: 640px; }
th, td { padding: 10px 12px; text-align: left; font-size: 13px; border-bottom: 1px solid var(--line); }
th { background: #f4faf6; color: var(--muted); font-weight: 600; position: sticky; top: 0; }
tbody tr:hover { background: #f8fcf9; }
.rank { font-weight: 800; color: var(--brand-2); }
.rank.gold { color: #b7791f; }
.empty { text-align: center; color: var(--muted); padding: 28px 8px; }

.chart-block { margin-top: 22px; }
canvas { width: 100%; height: 220px; display: block; }
.legend { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 8px; font-size: 12px; color: var(--muted); }
.legend span { display: inline-flex; align-items: center; gap: 6px; }
.swatch { width: 10px; height: 10px; border-radius: 3px; display: inline-block; }

.subject-stats { margin-top: 18px; display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 10px; }
.sub-card {
  border: 1px solid var(--line); border-radius: 12px; padding: 12px; background: #fff;
}
.sub-card h4 { margin: 0 0 8px; font-size: 14px; }
.sub-card p { margin: 0; font-size: 12px; color: var(--muted); line-height: 1.7; }

.foot {
  text-align: center; color: var(--muted); font-size: 12px; padding: 0 24px 28px;
}

@media (max-width: 960px) {
  .layout { grid-template-columns: 1fr; }
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
  .topbar { flex-direction: column; align-items: flex-start; }
}