/* ========== 全局样式 ========== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary: #4f46e5;
  --primary-light: #818cf8;
  --primary-bg: #eef2ff;
  --success: #16a34a;
  --success-bg: #dcfce7;
  --error: #dc2626;
  --error-bg: #fee2e2;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  --gold: #eab308;
  --silver: #94a3b8;
  --bronze: #d97706;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial,
    'Noto Sans SC', sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  color: var(--gray-800);
  line-height: 1.6;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 24px 16px;
}

/* ========== Header ========== */
header {
  text-align: center;
  margin-bottom: 24px;
  color: #fff;
}

header h1 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.subtitle {
  font-size: 0.95rem;
  opacity: 0.85;
}

/* ========== Card ========== */
.card {
  background: #fff;
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-lg);
}

.card h2 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--gray-800);
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--gray-100);
}

/* ========== 表单 ========== */
.form-row {
  display: flex;
  gap: 16px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.form-group {
  flex: 1;
  min-width: 180px;
}

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--gray-700);
  margin-bottom: 6px;
}

.form-group .hint {
  color: var(--gray-400);
  font-weight: 400;
  font-size: 0.8rem;
}

.form-group input,
.form-group select {
  width: 100%;
  padding: 10px 12px;
  border: 1.5px solid var(--gray-300);
  border-radius: 8px;
  font-size: 0.95rem;
  transition: border-color 0.2s, box-shadow 0.2s;
  background: #fff;
  color: var(--gray-800);
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}

.form-group input::placeholder {
  color: var(--gray-400);
}

/* 去掉 number input 的上下箭头 */
input[type='number']::-webkit-inner-spin-button,
input[type='number']::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}
input[type='number'] {
  -moz-appearance: textfield;
}

#submit-btn {
  width: 100%;
  padding: 12px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
}

#submit-btn:hover {
  background: #4338ca;
}

#submit-btn:active {
  transform: scale(0.98);
}

#submit-btn:disabled {
  background: var(--gray-400);
  cursor: not-allowed;
  transform: none;
}

/* ========== 消息提示 ========== */
.message {
  margin-top: 12px;
  padding: 10px 16px;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 500;
  transition: opacity 0.3s;
}

.message.success {
  background: var(--success-bg);
  color: var(--success);
  border: 1px solid #bbf7d0;
}

.message.error {
  background: var(--error-bg);
  color: var(--error);
  border: 1px solid #fecaca;
}

.hidden {
  display: none !important;
}

/* ========== 筛选控制 ========== */
.controls {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.filter-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.filter-group label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--gray-600);
  white-space: nowrap;
}

.filter-group select {
  padding: 8px 12px;
  border: 1.5px solid var(--gray-300);
  border-radius: 8px;
  font-size: 0.875rem;
  background: #fff;
  color: var(--gray-800);
  cursor: pointer;
}

.filter-group select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}

/* ========== 表格 ========== */
.table-wrapper {
  overflow-x: auto;
  border-radius: 8px;
  border: 1px solid var(--gray-200);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

thead {
  background: var(--gray-50);
}

th {
  padding: 12px 14px;
  text-align: center;
  font-weight: 600;
  color: var(--gray-600);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  white-space: nowrap;
  border-bottom: 2px solid var(--gray-200);
  user-select: none;
}

th.sortable {
  cursor: pointer;
  transition: color 0.2s, background 0.2s;
}

th.sortable:hover {
  color: var(--primary);
  background: var(--primary-bg);
}

th.active-sort {
  color: var(--primary);
  background: var(--primary-bg);
}

.sort-icon {
  font-size: 0.75rem;
  margin-left: 2px;
}

td {
  padding: 10px 14px;
  text-align: center;
  border-bottom: 1px solid var(--gray-100);
  color: var(--gray-700);
}

tbody tr {
  transition: background 0.15s;
}

tbody tr:hover {
  background: var(--gray-50);
}

.rank-cell {
  font-weight: 700;
  font-size: 1rem;
}

.score-cell {
  font-variant-numeric: tabular-nums;
}

.total-cell {
  color: var(--primary);
}

/* 排名前三高亮 */
tr.rank-1 {
  background: linear-gradient(90deg, #fef9c3 0%, #fff 60%);
}
tr.rank-1 .rank-cell {
  color: var(--gold);
}
tr.rank-1 .rank-cell::before {
  content: '🥇 ';
}

tr.rank-2 {
  background: linear-gradient(90deg, #f1f5f9 0%, #fff 60%);
}
tr.rank-2 .rank-cell {
  color: var(--silver);
}
tr.rank-2 .rank-cell::before {
  content: '🥈 ';
}

tr.rank-3 {
  background: linear-gradient(90deg, #fff7ed 0%, #fff 60%);
}
tr.rank-3 .rank-cell {
  color: var(--bronze);
}
tr.rank-3 .rank-cell::before {
  content: '🥉 ';
}

/* 专业标签 */
.major-tag {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 500;
  background: var(--primary-bg);
  color: var(--primary);
  white-space: nowrap;
}

.loading {
  text-align: center;
  color: var(--gray-400);
  padding: 40px 0 !important;
  font-size: 0.95rem;
}

.loading.error {
  color: var(--error);
}

/* ========== 统计信息 ========== */
.stats {
  display: flex;
  gap: 24px;
  margin-top: 16px;
  padding: 12px 16px;
  background: var(--gray-50);
  border-radius: 8px;
  font-size: 0.85rem;
  color: var(--gray-600);
  flex-wrap: wrap;
}

.stats strong {
  color: var(--gray-800);
}

/* ========== Footer ========== */
footer {
  text-align: center;
  padding: 16px 0;
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.8rem;
}

/* ========== 响应式 ========== */
@media (max-width: 640px) {
  .container {
    padding: 16px 8px;
  }

  header h1 {
    font-size: 1.5rem;
  }

  .card {
    padding: 16px;
  }

  .form-row {
    flex-direction: column;
    gap: 12px;
  }

  .form-group {
    min-width: 100%;
  }

  .controls {
    flex-direction: column;
    align-items: flex-start;
  }

  th, td {
    padding: 8px 8px;
    font-size: 0.8rem;
  }

  .stats {
    flex-direction: column;
    gap: 8px;
  }
}