:root {
  --bg: #f5efe7;
  --paper: #fffaf5;
  --text: #1d2433;
  --muted: #6b7280;
  --line: #e8dccd;
  --brand: #8c2f1d;
  --brand-dark: #5f1f15;
  --brand-soft: #f2ddd5;
  --accent: #1f5f5b;
  --success: #1f7a54;
  --warning: #a16116;
  --danger: #b3261e;
  --shadow: 0 20px 45px rgba(46, 26, 17, 0.08);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(140, 47, 29, 0.08), transparent 24%),
    radial-gradient(circle at top right, rgba(31, 95, 91, 0.08), transparent 18%),
    linear-gradient(180deg, #f8f0e8, #f3ebe4 30%, #efe5dc 100%);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", sans-serif;
}

code {
  padding: 2px 6px;
  border-radius: 8px;
  background: rgba(140, 47, 29, 0.08);
  color: var(--brand-dark);
}

.login-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.login-card {
  width: min(100%, 520px);
  background: rgba(255, 250, 245, 0.96);
  border: 1px solid rgba(232, 220, 205, 0.95);
  border-radius: 28px;
  padding: 28px;
  box-shadow: var(--shadow);
}

.login-card h1 {
  margin: 8px 0 12px;
  font-size: 36px;
}

.captcha-box {
  display: flex;
  align-items: end;
  gap: 12px;
}

.captcha-box span {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  padding: 0 14px;
  border: 1px dashed var(--line);
  border-radius: 14px;
  background: rgba(255,255,255,0.9);
  color: var(--brand-dark);
  font-weight: 700;
}

.hero, .student-hero {
  display: grid;
  grid-template-columns: 1.7fr 1fr;
  gap: 24px;
  padding: 36px 40px 24px;
}

.student-hero {
  grid-template-columns: 1fr;
  padding: 32px 32px 16px;
}

.hero-copy h1, .student-hero h1 {
  margin: 8px 0 12px;
  font-size: clamp(32px, 5vw, 48px);
  line-height: 1.08;
  letter-spacing: 0.02em;
}

.eyebrow, .section-kicker {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 12px;
  color: var(--brand);
  font-weight: 700;
}

.hero-text {
  margin: 0;
  max-width: 760px;
  line-height: 1.7;
  color: #475569;
}

.hero-panel {
  background: linear-gradient(155deg, rgba(140, 47, 29, 0.96), rgba(95, 31, 21, 0.92));
  color: #fff;
  border-radius: 28px;
  padding: 24px;
  box-shadow: var(--shadow);
}

.hero-badge {
  display: inline-flex;
  padding: 8px 14px;
  background: rgba(255, 255, 255, 0.12);
  border-radius: 999px;
  font-size: 13px;
  margin-bottom: 14px;
}

.hero-metric {
  display: grid;
  gap: 6px;
  padding: 14px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
}

.hero-metric:first-of-type { border-top: 0; }

.layout, .student-wrap {
  padding: 0 24px 32px;
  display: grid;
  gap: 20px;
}

.student-wrap {
  max-width: 980px;
  margin: 0 auto;
  padding: 0 20px 32px;
}

.grid.two-col {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.card {
  background: rgba(255, 250, 245, 0.92);
  border: 1px solid rgba(232, 220, 205, 0.95);
  border-radius: 24px;
  padding: 22px;
  box-shadow: var(--shadow);
}

.summary-card { border-top: 5px solid var(--brand); }

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 16px;
}

.section-header h2 {
  margin: 4px 0 0;
  font-size: 24px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(120px, 1fr));
  gap: 14px;
}

.stat-box {
  background: linear-gradient(180deg, rgba(255,255,255,0.95), rgba(248,241,234,0.95));
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 16px;
}

.stat-box span {
  display: block;
  color: var(--muted);
  font-size: 13px;
}

.stat-box strong {
  display: block;
  margin-top: 10px;
  font-size: 28px;
  color: var(--brand-dark);
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.form-grid .full { grid-column: 1 / -1; }

label, .inline-controls label {
  display: grid;
  gap: 8px;
}

label span, .inline-controls span {
  font-size: 13px;
  color: var(--muted);
}

input, select, textarea, button, .link-btn { font: inherit; }

input, select, textarea {
  width: 100%;
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid #d8cabb;
  background: #fff;
  color: var(--text);
}

textarea { resize: vertical; }

button, .link-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 0;
  border-radius: 14px;
  padding: 12px 16px;
  cursor: pointer;
  text-decoration: none;
  color: #fff;
  background: linear-gradient(135deg, var(--brand), #b44c35);
  box-shadow: 0 10px 24px rgba(140, 47, 29, 0.2);
}

.secondary-btn { background: linear-gradient(135deg, var(--accent), #317a75); }
.ghost-btn, .link-btn { background: #f4e8df; color: var(--brand-dark); box-shadow: none; }

.stack-form { display: grid; gap: 12px; }

.table-shell {
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255,255,255,0.88);
}

table {
  width: 100%;
  min-width: 940px;
  border-collapse: collapse;
}

th, td {
  padding: 14px 12px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
}

thead th {
  position: sticky;
  top: 0;
  background: #fbf4ee;
  color: var(--brand-dark);
}

.tag {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 12px;
  font-weight: 700;
}

.tag.ok { background: #dff4e8; color: var(--success); }
.tag.warn { background: #faedd6; color: var(--warning); }
.tag.danger { background: #f9dddb; color: var(--danger); }
.tag.info { background: var(--brand-soft); color: var(--brand); }

.pool-grid, .assign-board, .candidate-list, .student-meta, .meta-list, .preference-stack {
  display: grid;
  gap: 12px;
}

.student-meta {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.pool-card, .assign-card, .preference-choice {
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 18px;
  background: rgba(255,255,255,0.86);
}

.pool-card h3, .assign-card h3 {
  margin: 0;
  font-size: 20px;
}

.candidate-item {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 14px;
  border-radius: 16px;
  border: 1px solid #eaded2;
  background: linear-gradient(180deg, #ffffff, #fbf4ef);
}

.candidate-main {
  flex: 1;
  min-width: 0;
}

.candidate-item strong { display: block; }
.candidate-item small { display: block; color: var(--muted); }

.candidate-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border-radius: 12px;
  border: 1px solid #d8cabb;
  background: #fff;
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
  flex: 0 0 auto;
}

.candidate-toggle input {
  width: 18px;
  height: 18px;
  margin: 0;
  cursor: pointer;
}

.candidate-toggle span {
  font-size: 13px;
  color: var(--brand-dark);
  font-weight: 600;
}

.tip-box {
  margin-bottom: 16px;
  padding: 14px 16px;
  border-radius: 16px;
  background: #f6ebe4;
  color: #6c3d30;
  line-height: 1.65;
}

.inline-controls {
  display: flex;
  gap: 12px;
  align-items: end;
  flex-wrap: wrap;
}

.form-actions {
  display: flex;
  justify-content: flex-end;
}

.link-copy {
  display: flex;
  gap: 8px;
  align-items: center;
}

.link-copy input { min-width: 240px; }

.toast {
  position: fixed;
  right: 22px;
  bottom: 22px;
  max-width: 360px;
  padding: 14px 16px;
  border-radius: 16px;
  background: rgba(29, 36, 51, 0.96);
  color: #fff;
  box-shadow: 0 18px 36px rgba(0,0,0,0.18);
}

.hidden { display: none; }

@media (max-width: 1080px) {
  .hero {
    grid-template-columns: 1fr;
    padding: 28px 20px 16px;
  }

  .layout {
    padding: 0 16px 24px;
  }

  .grid.two-col, .form-grid, .stats-grid, .student-meta {
    grid-template-columns: 1fr;
  }

  .section-header {
    flex-direction: column;
  }
}