/* ============================================
   responsive.css — All Responsive @media Queries
   卡丁车赛事资讯平台 - 适配: 桌面, 平板, 手机, 小屏
   ============================================ */

/* ===== LARGE TABLET (≤1100px) ===== */
@media (max-width: 1100px) {
  .waterfall {
    columns: 3 220px;
  }
}

/* ===== TABLET (≤800px) ===== */
@media (max-width: 800px) {
  .waterfall {
    columns: 2 160px;
    column-gap: 16px;
  }

  .hero-title {
    letter-spacing: 2px;
  }

  .hero-stats {
    gap: 24px;
  }

  .stat-value {
    font-size: 28px;
  }

  .modal-info-grid {
    grid-template-columns: 1fr;
  }

  .modal-header,
  .modal-body,
  .modal-footer {
    padding-left: 20px;
    padding-right: 20px;
  }

  .back-to-top {
    bottom: 24px;
    right: 24px;
    width: 46px;
    height: 46px;
  }
}

/* ===== TABLET / LARGE PHONE (≤768px) ===== */
@media (max-width: 768px) {
  .category-tabs-inner {
    padding: 10px 16px;
  }

  .category-tab {
    padding: 8px 16px;
    font-size: 13px;
  }

  .hot-races-inner {
    padding: 0 16px;
  }

  .hot-race-card {
    width: 180px;
    padding: 12px;
  }

  .hot-card-title {
    font-size: 13px;
  }

  .poster-modal {
    padding: 20px;
  }

  .poster-actions {
    flex-direction: column;
  }

  .poster-actions .btn {
    width: 100%;
  }

  /* Hero AI Chat */
  .hero-ai-chat {
    padding: 16px;
  }

  .hero-ai-messages {
    height: 200px;
  }

  .hero-ai-input-row input {
    padding: 12px 16px;
  }

  .hero-ai-send {
    width: 44px;
    height: 44px;
  }
}

/* ===== MOBILE (≤500px) ===== */
@media (max-width: 500px) {
  .waterfall {
    columns: 2 140px;
  }

  .header-inner {
    padding: 0 12px;
    height: 52px;
  }

  .logo-icon { font-size: 22px; }
  .logo-text {
    font-size: 15px;
  }

  .logo-sub {
    display: none;
  }

  .nav {
    gap: 4px;
  }

  .nav-link {
    font-size: 11px;
    padding: 6px 8px;
    white-space: nowrap;
    letter-spacing: 0;
  }

  .admin-btn {
    font-size: 11px !important;
    padding: 6px 8px !important;
  }

  .hero {
    padding: 80px 12px 40px;
  }

  .hero-title {
    font-size: 22px !important;
  }

  .search-bar {
    height: 44px;
    padding: 0 6px 0 14px;
  }

  .search-btn {
    padding: 8px 14px;
    font-size: 12px;
  }

  .hero-stats {
    flex-direction: column;
    gap: 12px;
  }

  .stat-value {
    font-size: 22px;
  }

  .card-body {
    padding: 10px;
  }

  .card-title {
    font-size: 13px;
  }

  .card-city-row {
    gap: 4px;
    margin-bottom: 6px;
  }

  .card-city, .card-category {
    font-size: 10px;
    padding: 1px 7px;
  }

  .card-venue {
    font-size: 11px;
    margin-bottom: 6px;
  }

  .card-meta-row {
    font-size: 11px;
  }

  .card-fee {
    font-size: 13px;
  }

  .card-source {
    font-size: 9px;
    margin-top: 6px;
  }

  .back-to-top {
    width: 40px;
    height: 40px;
    bottom: 20px;
    right: 16px;
    font-size: 16px;
  }

  /* 弹窗小屏适配 */
  .modal-overlay {
    padding: 0;
    align-items: flex-end;
  }
  .modal {
    border-radius: 20px 20px 0 0;
    max-height: 92vh;
    max-width: 100%;
  }
  .modal-header,
  .modal-body,
  .modal-footer {
    padding-left: 16px;
    padding-right: 16px;
  }
  .modal-title {
    font-size: 17px;
  }
  .modal-footer {
    flex-direction: column;
    gap: 10px;
  }
  .modal-btn-share, .modal-btn-reg {
    width: 100%;
    text-align: center;
  }
}

/* Mobile ≤500px — additional overrides (after 768px block in source) */
@media (max-width: 500px) {
  .filter-bar {
    top: 120px;
  }

  .hot-race-card {
    width: 160px;
  }
}

/* ===== SMALL PHONE (≤380px) ===== */
@media (max-width: 380px) {
  .waterfall {
    columns: 2 120px;
    column-gap: 8px;
  }

  .header-inner {
    height: 48px;
  }

  .logo-icon { font-size: 18px; }
  .logo-text { font-size: 14px; }

  .nav-link {
    font-size: 10px;
    padding: 5px 6px;
  }

  .hero { padding: 60px 10px 30px; }
  .hero-title { font-size: 19px !important; }
  .hero-sub { font-size: 11px; }

  .search-bar { height: 40px; }
  .search-bar input { font-size: 13px; }
  .search-btn { padding: 7px 10px; font-size: 11px; }

  .card-body { padding: 8px; }
  .card-title { font-size: 12px; }
  .card-meta-row { font-size: 10px; }
  .card-fee { font-size: 12px; }

  .category-tabs-inner { padding: 8px 10px; gap: 4px; }
  .category-tab { padding: 5px 10px; font-size: 11px; }
  .filter-btn { padding: 4px 10px; font-size: 11px; }
  .hot-race-card { padding: 12px; }
}