* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --bg: #f1f5f9;
  --card: #ffffff;
  --text: #1e293b;
  --text-light: #64748b;
  --border: #e2e8f0;
  --green: #16a34a;
  --red: #dc2626;
  --amber: #d97706;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

.topbar {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
  position: sticky;
  top: 0;
  z-index: 100;
}
.topbar h1 { font-size: 22px; font-weight: 700; }
.topbar nav { display: flex; gap: 12px; }
.nav-link {
  color: rgba(255,255,255,0.85);
  text-decoration: none;
  padding: 6px 14px;
  border-radius: 6px;
  font-size: 14px;
  transition: background 0.2s;
}
.nav-link:hover, .nav-link.active { background: rgba(255,255,255,0.2); color: #fff; }

main { max-width: 1200px; margin: 0 auto; padding: 24px; }

/* ===== 卡片 ===== */
.card {
  background: var(--card);
  border-radius: 10px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.08);
  padding: 20px;
  margin-bottom: 20px;
}
.card-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* ===== 表单 ===== */
.form-group { margin-bottom: 14px; }
.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-light);
  margin-bottom: 6px;
}
input[type="text"], input[type="number"], select, textarea {
  width: 100%;
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
  background: #fff;
  transition: border-color 0.2s;
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}
textarea { resize: vertical; min-height: 120px; font-family: inherit; }

/* ===== 按钮 ===== */
.btn {
  display: inline-block;
  padding: 8px 16px;
  border: none;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
  text-align: center;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-secondary { background: var(--border); color: var(--text); }
.btn-secondary:hover { background: #cbd5e1; }
.btn-success { background: var(--green); color: #fff; }
.btn-success:hover { background: #15803d; }
.btn-danger { background: var(--red); color: #fff; }
.btn-danger:hover { background: #b91c1c; }
.btn-sm { padding: 4px 10px; font-size: 12px; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* ===== 登录 ===== */
.btn-login {
  background: rgba(255,255,255,0.2);
  color: #fff;
  border: 1px solid rgba(255,255,255,0.4);
  padding: 5px 14px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}
.btn-login:hover { background: rgba(255,255,255,0.35); }
.nav-user { color: #fff; font-size: 13px; font-weight: 600; }
.hidden { display: none !important; }

/* ===== 表格 ===== */
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border); }
th { background: #f8fafc; font-weight: 600; color: var(--text-light); font-size: 13px; }
tr:hover { background: #f8fafc; }
.rank-1 { color: var(--amber); font-weight: 700; }
.rank-2 { color: var(--text-light); font-weight: 700; }
.rank-3 { color: #b45309; font-weight: 700; }

/* ===== 列表 ===== */
.list-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 10px;
  background: #fff;
  cursor: pointer;
  transition: all 0.2s;
}
.list-item:hover { border-color: var(--primary); box-shadow: 0 2px 8px rgba(37,99,235,0.12); }
.list-item .name { font-weight: 700; font-size: 16px; }
.list-item .meta { font-size: 13px; color: var(--text-light); margin-top: 4px; }
.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  background: #dbeafe;
  color: var(--primary-dark);
}
.badge.badge-green { background: #dcfce7; color: var(--green); }
.badge.badge-amber { background: #fef3c7; color: var(--amber); }
.badge.badge-gray { background: #e2e8f0; color: var(--text-light); }

/* ===== 对阵表 ===== */
.bracket-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; }
.bracket-col {
  background: #f8fafc;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
}
.bracket-col h4 {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-light);
  text-align: center;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.match-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 10px;
  overflow: hidden;
}
.match-card.played { border-color: #bbf7d0; }
.match-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  gap: 8px;
}
.match-row + .match-row { border-top: 1px dashed var(--border); }
.match-player { font-size: 13px; font-weight: 500; flex: 1; }
.match-player.winner { color: var(--green); font-weight: 700; }
.match-player.bye { color: var(--text-light); font-style: italic; }
.match-score {
  font-size: 14px;
  font-weight: 700;
  color: var(--primary-dark);
  background: #eff6ff;
  padding: 2px 10px;
  border-radius: 4px;
}
.match-actions {
  display: flex;
  gap: 6px;
  padding: 6px 12px;
  border-top: 1px solid var(--border);
  background: #f8fafc;
}
.empty-hint {
  text-align: center;
  color: var(--text-light);
  font-size: 13px;
  padding: 20px 0;
}

/* ===== 选手标签 ===== */
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #eff6ff;
  color: var(--primary-dark);
  border-radius: 999px;
  padding: 5px 12px;
  font-size: 13px;
  font-weight: 500;
}
.chip .chip-del {
  cursor: pointer;
  color: var(--text-light);
  font-weight: 700;
  padding: 0 2px;
}
.chip .chip-del:hover { color: var(--red); }

/* ===== 弹窗 ===== */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(15,23,42,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
}
.modal.hidden { display: none; }
.modal-content {
  background: #fff;
  border-radius: 12px;
  padding: 24px;
  width: 92%;
  max-width: 480px;
  box-shadow: 0 20px 40px rgba(0,0,0,0.2);
}
.modal-content h3 { margin-bottom: 16px; font-size: 18px; }
.modal-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 18px; }

/* 比分输入 */
.score-inputs { display: flex; align-items: center; justify-content: center; gap: 16px; padding: 10px 0; }
.score-inputs .player-name { font-weight: 600; font-size: 15px; }
.score-inputs input {
  width: 80px;
  text-align: center;
  font-size: 20px;
  font-weight: 700;
  padding: 8px;
}
.score-inputs .vs { color: var(--text-light); font-weight: 700; }

/* ===== Toast ===== */
.toast {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: #1e293b;
  color: #fff;
  padding: 12px 24px;
  border-radius: 8px;
  font-size: 14px;
  z-index: 300;
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
  transition: opacity 0.3s;
}
.toast.hidden { opacity: 0; pointer-events: none; }
.toast.success { background: var(--green); }
.toast.error { background: var(--red); }

/* ===== 详情头 ===== */
.detail-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 8px;
}
.detail-header h2 { font-size: 22px; }
.detail-actions { display: flex; gap: 10px; flex-wrap: wrap; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
@media (max-width: 768px) {
  .grid-2 { grid-template-columns: 1fr; }
  main { padding: 12px; }
  .topbar { padding: 12px 16px; flex-direction: column; gap: 8px; }
}

.tab-nav { display: flex; gap: 6px; margin-bottom: 16px; border-bottom: 2px solid var(--border); }
.tab-btn {
  padding: 8px 18px;
  border: none;
  background: transparent;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-light);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
}
.tab-btn.active { color: var(--primary); border-bottom-color: var(--primary); }

.help-text { font-size: 12px; color: var(--text-light); margin-top: 4px; }
.section-sub { font-size: 13px; color: var(--text-light); margin-bottom: 10px; }