:root {
  --td-brand-color: #0052D9;
  --td-brand-color-hover: #266FE8;
  --td-brand-color-active: #0034B5;
  --td-bg-color-page: #F3F3F3;
  --td-bg-color-container: #FFFFFF;
  --td-text-color-primary: rgba(0,0,0,0.9);
  --td-text-color-secondary: rgba(0,0,0,0.6);
  --td-text-color-placeholder: rgba(0,0,0,0.4);
  --td-border-level-1-color: #DCDCDC;
  --td-radius-default: 6px;
  --td-radius-medium: 9px;
  --td-radius-large: 12px;
  --td-shadow-1: 0 1px 10px rgba(0,0,0,0.05), 0 4px 5px rgba(0,0,0,0.08), 0 2px 4px -1px rgba(0,0,0,0.12);
  --td-shadow-2: 0 3px 14px 2px rgba(0,0,0,0.05), 0 8px 10px 1px rgba(0,0,0,0.06), 0 5px 5px -3px rgba(0,0,0,0.1);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: linear-gradient(180deg, #F0F4FF 0%, #F3F5FA 40%, #EFF1F7 100%);
  color: var(--td-text-color-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow-x: hidden;
}

/* ========== 几何图形交互 Banner ========== */
.geo-banner {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.geo-banner canvas {
  display: block;
  width: 100%;
  height: 100%;
}

/* Header - iOS 玻璃质感 */
.header {
  background: rgba(255, 255, 255, 0.55);
  backdrop-filter: blur(28px) saturate(200%);
  -webkit-backdrop-filter: blur(28px) saturate(200%);
  border-bottom: 0.5px solid rgba(255, 255, 255, 0.35);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.06), inset 0 0.5px 0 rgba(255, 255, 255, 0.6);
  padding: 0 24px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo {
  font-size: 20px;
  font-weight: 700;
  color: var(--td-brand-color);
  text-decoration: none;
  letter-spacing: -0.5px;
}

.logo span { color: var(--td-text-color-primary); }

.header-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.quota-badge {
  font-size: 13px;
  color: var(--td-text-color-secondary);
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 14px;
  background: rgba(255, 255, 255, 0.4);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 0.5px solid rgba(255, 255, 255, 0.5);
  border-radius: 20px;
}

.quota-badge .count {
  font-weight: 600;
  color: var(--td-brand-color);
}

.quota-badge.warning .count { color: #E37318; }
.quota-badge.danger .count { color: #D54941; }

.user-area {
  display: flex;
  align-items: center;
  gap: 8px;
}

.user-avatar {
  width: 32px; height: 32px;
  border-radius: 50%;
  background: var(--td-brand-color);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 600;
}

/* Main Container */
.main-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 32px 24px;
  flex: 1;
  width: 100%;
  position: relative;
  z-index: 1;
}

/* 初始状态 - 搜索区域垂直居中 */
.main-container.is-initial {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  min-height: calc(100vh - 56px - 70px);
}
.main-container.is-initial .search-section {
  margin-bottom: 0;
  width: 100%;
  max-width: 720px;
}
.main-container.is-initial #results-grid {
  display: none;
}
/* 初始状态：放大标题 */
.main-container.is-initial .search-title {
  font-size: 48px;
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: 12px;
  background: linear-gradient(135deg, #0052D9 0%, #4787F0 40%, #6C5CE7 70%, #00D2D3 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.main-container.is-initial .search-subtitle {
  font-size: 17px;
  margin-bottom: 36px;
  color: rgba(0,0,0,0.45);
  font-weight: 400;
  letter-spacing: 0.5px;
}
/* 初始状态：搜索框变大 */
.main-container.is-initial .search-box {
  max-width: 680px;
}
.main-container.is-initial .search-input-wrap {
  background: rgba(255, 255, 255, 0.35);
  backdrop-filter: blur(40px) saturate(220%);
  -webkit-backdrop-filter: blur(40px) saturate(220%);
  border: 1.5px solid rgba(255, 255, 255, 0.6);
  border-radius: 25px;
  padding: 6px;
  box-shadow:
    0 16px 48px rgba(0, 0, 0, 0.07),
    0 4px 16px rgba(0, 0, 0, 0.04),
    inset 0 1.5px 0 rgba(255, 255, 255, 0.8),
    inset 0 -1px 0 rgba(0, 0, 0, 0.04);
  transition: border-color 0.35s, box-shadow 0.35s, background 0.35s, transform 0.35s;
}
.main-container.is-initial .search-input-wrap:focus-within {
  background: rgba(255, 255, 255, 0.6);
  border-color: rgba(0, 82, 217, 0.55);
  box-shadow:
    0 0 0 6px rgba(0, 82, 217, 0.06),
    0 20px 56px rgba(0, 82, 217, 0.12),
    0 4px 16px rgba(0, 0, 0, 0.05),
    inset 0 1.5px 0 rgba(255, 255, 255, 0.9);
  transform: scale(1.02);
}
.main-container.is-initial .search-input-wrap input {
  padding: 16px 22px;
  font-size: 20px;
  font-weight: 400;
}
.main-container.is-initial .search-input-wrap input::placeholder {
  font-size: 18px;
  color: rgba(0,0,0,0.3);
  font-weight: 300;
}
.main-container.is-initial .search-input-wrap .search-btn {
  padding: 14px 32px;
  font-size: 17px;
  font-weight: 600;
  border-radius: 21px;
  letter-spacing: 0.5px;
  margin: 0;
  background: linear-gradient(135deg, #0052D9 0%, #1E6FFF 100%);
  box-shadow: none;
  transition: background 0.3s, box-shadow 0.3s, transform 0.2s;
}
.main-container.is-initial .search-input-wrap .search-btn:hover {
  background: linear-gradient(135deg, #0045B8 0%, #1A5FDB 100%);
  box-shadow: 0 4px 18px rgba(0,82,217,0.25);
  transform: translateY(-1px);
}
.main-container.is-initial .search-input-wrap .search-btn:active {
  transform: scale(0.97);
}
/* 初始状态：引擎选择器 */
.main-container.is-initial .engine-selector {
  margin-top: 22px;
  gap: 10px;
}
.main-container.is-initial .engine-selector .engine-chip {
  padding: 8px 22px;
  font-size: 15px;
  border-radius: 24px;
  backdrop-filter: blur(25px) saturate(200%);
  -webkit-backdrop-filter: blur(25px) saturate(200%);
}
/* 初始状态：清除按钮 */
.main-container.is-initial .search-input-wrap .clear-btn {
  padding: 10px 14px;
  font-size: 22px;
}
@media (max-width: 768px) {
  .main-container.is-initial {
    min-height: calc(100vh - 56px - 60px);
    padding: 20px 12px;
  }
  .main-container.is-initial .search-title {
    font-size: 34px;
  }
  .main-container.is-initial .search-subtitle {
    font-size: 15px;
    margin-bottom: 28px;
  }
  .main-container.is-initial .search-input-wrap input {
    padding: 14px 16px;
    font-size: 17px;
  }
  .main-container.is-initial .search-input-wrap input::placeholder {
    font-size: 15px;
  }
  .main-container.is-initial .search-input-wrap .search-btn {
    padding: 12px 24px;
    font-size: 15px;
    border-radius: 19px;
  }
  .main-container.is-initial .engine-selector .engine-chip {
    padding: 6px 14px;
    font-size: 13px;
  }
  .main-container.is-initial .search-input-wrap:focus-within {
    transform: none;
  }
}

/* 广告位 */
.ad-slot {
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 24px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 1;
}

.ad-slot:empty {
  display: none;
}

/* Search Section */
.search-section {
  text-align: center;
  margin-bottom: 40px;
}

.search-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--td-text-color-primary);
  margin-bottom: 8px;
  letter-spacing: -0.5px;
}

.search-subtitle {
  font-size: 14px;
  color: var(--td-text-color-secondary);
  margin-bottom: 28px;
}

.search-box {
  position: relative;
  max-width: 640px;
  margin: 0 auto;
}

.search-input-wrap {
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.45);
  backdrop-filter: blur(30px) saturate(200%);
  -webkit-backdrop-filter: blur(30px) saturate(200%);
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: 25px;
  padding: 4px;
  transition: border-color 0.25s, box-shadow 0.25s, background 0.25s;
  box-shadow:
    0 8px 32px rgba(0, 0, 0, 0.06),
    0 2px 8px rgba(0, 0, 0, 0.04),
    inset 0 1px 0 rgba(255, 255, 255, 0.7);
}

.search-input-wrap:focus-within {
  background: rgba(255, 255, 255, 0.65);
  border-color: rgba(0, 82, 217, 0.5);
  box-shadow:
    0 0 0 4px rgba(0, 82, 217, 0.08),
    0 12px 40px rgba(0, 82, 217, 0.12),
    0 2px 8px rgba(0, 0, 0, 0.06),
    inset 0 1px 0 rgba(255, 255, 255, 0.8);
}

.search-input-wrap input {
  flex: 1;
  border: none;
  outline: none;
  padding: 12px 16px;
  font-size: 16px;
  background: transparent;
  color: var(--td-text-color-primary);
}

.search-input-wrap input::placeholder {
  color: var(--td-text-color-placeholder);
}

.search-input-wrap .clear-btn {
  background: none;
  border: none;
  color: var(--td-text-color-placeholder);
  cursor: pointer;
  padding: 8px 12px;
  font-size: 18px;
  display: none;
  line-height: 1;
  border-radius: 50%;
  transition: background 0.2s;
}

.search-input-wrap .clear-btn:hover { background: var(--td-bg-color-page); }
.search-input-wrap .clear-btn.visible { display: block; }

.search-input-wrap .search-btn {
  background: var(--td-brand-color);
  color: #fff;
  border: none;
  padding: 10px 28px;
  border-radius: 21px;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s, box-shadow 0.2s;
  margin: 0;
  white-space: nowrap;
  box-shadow: none;
}

.search-input-wrap .search-btn:hover { background: var(--td-brand-color-hover); }
.search-input-wrap .search-btn:active { background: var(--td-brand-color-active); }
.search-input-wrap .search-btn:disabled { background: #B5C7E8; cursor: not-allowed; }

/* Engine Selector */
.engine-selector {
  display: flex;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 16px;
}

@media (max-width: 768px) {
  .engine-selector {
    flex-wrap: nowrap;
    overflow-x: auto;
    justify-content: flex-start;
    padding-bottom: 4px;
    -webkit-overflow-scrolling: touch;
  }
  .engine-selector .engine-chip {
    flex-shrink: 0;
    white-space: nowrap;
  }
}

.engine-chip {
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 13px;
  cursor: pointer;
  border: 0.5px solid rgba(255, 255, 255, 0.5);
  background: rgba(255, 255, 255, 0.35);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  color: var(--td-text-color-secondary);
  transition: all 0.25s;
  user-select: none;
  display: flex;
  align-items: center;
  gap: 6px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.engine-chip:hover {
  border-color: rgba(0, 82, 217, 0.5);
  color: var(--td-brand-color);
  background: rgba(255, 255, 255, 0.6);
  box-shadow: 0 2px 8px rgba(0, 82, 217, 0.1);
}
.engine-chip.active {
  background: rgba(0, 82, 217, 0.12);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-color: rgba(0, 82, 217, 0.4);
  color: var(--td-brand-color);
  font-weight: 500;
  box-shadow: 0 2px 8px rgba(0, 82, 217, 0.1);
}

.engine-chip .dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.6;
}

/* Results Grid */
.results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}

.result-column {
  background: rgba(255, 255, 255, 0.62);
  backdrop-filter: blur(16px) saturate(150%);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  border-radius: var(--td-radius-medium);
  border: 1px solid rgba(0, 0, 0, 0.06);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04), 0 1px 3px rgba(0, 0, 0, 0.04);
  overflow: hidden;
  transition: box-shadow 0.3s, transform 0.3s, background 0.3s;
  display: none;
}

.result-column.visible { display: block; }
.result-column:hover {
  background: rgba(255, 255, 255, 0.78);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.06), 0 2px 6px rgba(0, 0, 0, 0.06);
  transform: translateY(-2px);
}

.column-header {
  padding: 16px 20px 12px;
  border-bottom: 1px solid var(--td-border-level-1-color);
  display: flex;
  align-items: center;
  gap: 10px;
}

.column-header .engine-icon {
  width: 32px; height: 32px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}

.engine-baidu { background: linear-gradient(135deg, #2932E1, #4E6EF2); }
.engine-360 { background: linear-gradient(135deg, #29B367, #3CC97E); }
.engine-sogou { background: linear-gradient(135deg, #FF6B35, #FF8F5E); }
.engine-toutiao { background: linear-gradient(135deg, #E02020, #F05050); }

.column-header .engine-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--td-text-color-primary);
}

.column-header .engine-type {
  font-size: 11px;
  color: var(--td-text-color-placeholder);
  margin-top: 1px;
}

.suggestion-list {
  padding: 8px 0;
}

.suggestion-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 20px;
  cursor: pointer;
  transition: background 0.15s;
  text-decoration: none;
  color: var(--td-text-color-primary);
}

.suggestion-item:hover { background: rgba(0,82,217,0.04); }

.suggestion-item .sug-icon {
  width: 20px; height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--td-text-color-placeholder);
  flex-shrink: 0;
}

.suggestion-item .sug-text {
  font-size: 14px;
  line-height: 1.5;
  word-break: break-all;
}

.suggestion-item .sug-tag {
  font-size: 11px;
  padding: 2px 6px;
  border-radius: 4px;
  background: rgba(0,82,217,0.08);
  color: var(--td-brand-color);
  margin-left: auto;
  flex-shrink: 0;
}

/* Loading */
.loading-area {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 20px;
  color: var(--td-text-color-placeholder);
  width: 100%;
}

.loading-spinner {
  width: 40px; height: 40px;
  border: 3px solid var(--td-border-level-1-color);
  border-top-color: var(--td-brand-color);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-bottom: 16px;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* Empty State */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 80px 20px;
  color: var(--td-text-color-placeholder);
  width: 100%;
}

.empty-state .empty-icon {
  font-size: 64px;
  margin-bottom: 16px;
  opacity: 0.4;
}

.empty-state .empty-text {
  font-size: 16px;
  margin-bottom: 4px;
}

.empty-state .empty-sub {
  font-size: 13px;
}

/* Modal Overlay */
.modal-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.5);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeIn 0.2s;
}

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.modal-dialog {
  background: var(--td-bg-color-container);
  border-radius: var(--td-radius-large);
  width: 90%;
  max-width: 420px;
  box-shadow: var(--td-shadow-2);
  animation: slideUp 0.25s;
}

@keyframes slideUp { from { transform: translateY(20px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }

.modal-header {
  padding: 24px 24px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-header h3 {
  font-size: 18px;
  font-weight: 600;
}

.modal-close {
  width: 32px; height: 32px;
  border: none;
  background: none;
  font-size: 20px;
  cursor: pointer;
  color: var(--td-text-color-placeholder);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
}

.modal-close:hover { background: var(--td-bg-color-page); }

.modal-body { padding: 24px; }

.modal-tabs {
  display: flex;
  gap: 0;
  margin-bottom: 20px;
  border-bottom: 2px solid var(--td-border-level-1-color);
}

.modal-tab {
  padding: 8px 20px;
  font-size: 14px;
  cursor: pointer;
  color: var(--td-text-color-secondary);
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: all 0.2s;
  background: none;
  border-top: none;
  border-left: none;
  border-right: none;
}

.modal-tab.active {
  color: var(--td-brand-color);
  border-bottom-color: var(--td-brand-color);
  font-weight: 500;
}

/* Login method tabs inside auth modal */
.login-method-tabs {
  display: flex;
  gap: 8px;
}

.login-method-tab {
  flex: 1;
  padding: 8px 0;
  font-size: 13px;
  cursor: pointer;
  color: var(--td-text-color-secondary);
  background: var(--td-bg-color-page);
  border: 1.5px solid var(--td-border-level-1-color);
  border-radius: var(--td-radius-default);
  transition: all 0.2s;
}

.login-method-tab.active {
  color: var(--td-brand-color);
  background: rgba(0,82,217,0.06);
  border-color: var(--td-brand-color);
  font-weight: 500;
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 13px;
  color: var(--td-text-color-secondary);
  margin-bottom: 6px;
  font-weight: 500;
}

.form-input {
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid var(--td-border-level-1-color);
  border-radius: var(--td-radius-default);
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s;
  background: var(--td-bg-color-container);
}

.form-input:focus { border-color: var(--td-brand-color); }

.code-row {
  display: flex;
  gap: 10px;
}

.code-row .form-input { flex: 1; }

.send-code-btn {
  padding: 10px 16px;
  background: var(--td-brand-color);
  color: #fff;
  border: none;
  border-radius: var(--td-radius-default);
  font-size: 13px;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.2s;
}

.send-code-btn:hover { background: var(--td-brand-color-hover); }
.send-code-btn:disabled { background: #B5C7E8; cursor: not-allowed; }

.submit-btn {
  width: 100%;
  padding: 12px;
  background: var(--td-brand-color);
  color: #fff;
  border: none;
  border-radius: var(--td-radius-default);
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s;
  margin-top: 8px;
}

.submit-btn:hover { background: var(--td-brand-color-hover); }
.submit-btn:disabled { background: #B5C7E8; cursor: not-allowed; }

.form-error {
  font-size: 12px;
  color: #D54941;
  margin-top: 4px;
  display: none;
}

.form-error.visible { display: block; }

.alert-msg {
  padding: 10px 14px;
  border-radius: var(--td-radius-default);
  font-size: 13px;
  margin-bottom: 16px;
  display: none;
}

.alert-msg.visible { display: block; }
.alert-msg.error { background: #FDECEE; color: #D54941; border: 1px solid #F9D7D9; }
.alert-msg.success { background: #E8F8F2; color: #2BA471; border: 1px solid #C1EBD8; }

/* Footer */
.footer {
  text-align: center;
  padding: 24px;
  font-size: 12px;
  color: var(--td-text-color-placeholder);
  border-top: 1px solid rgba(0, 0, 0, 0.06);
  background: rgba(255, 255, 255, 0.45);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  position: relative;
  z-index: 1;
}

.footer a { color: var(--td-brand-color); text-decoration: none; }
.footer a:hover { text-decoration: underline; }

/* Toast */
.toast {
  position: fixed;
  top: 80px;
  left: 50%;
  transform: translateX(-50%);
  padding: 10px 24px;
  border-radius: var(--td-radius-default);
  font-size: 14px;
  z-index: 2000;
  box-shadow: var(--td-shadow-2);
  animation: slideDown 0.3s;
}

@keyframes slideDown { from { transform: translateX(-50%) translateY(-20px); opacity: 0; } to { transform: translateX(-50%) translateY(0); opacity: 1; } }

.toast.error { background: #D54941; color: #fff; }
.toast.success { background: #2BA471; color: #fff; }
.toast.warning { background: #E37318; color: #fff; }

/* Limit Modal */
.limit-modal .limit-icon { font-size: 48px; text-align: center; margin-bottom: 12px; }
.limit-modal .limit-text { text-align: center; font-size: 15px; margin-bottom: 20px; color: var(--td-text-color-secondary); }

/* History Modal */
.history-modal .modal-dialog {
  max-width: 520px;
  max-height: 80vh;
  display: flex;
  flex-direction: column;
}
.history-modal .modal-body {
  overflow-y: auto;
  padding: 16px 24px 24px;
  flex: 1;
  -webkit-overflow-scrolling: touch;
}
.history-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.history-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  gap: 12px;
}
.history-item:last-child { border-bottom: none; }
.history-item .h-keyword {
  font-size: 15px;
  font-weight: 500;
  color: var(--td-text-color-primary);
  cursor: pointer;
  transition: color 0.15s;
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.history-item .h-keyword:hover { color: var(--td-brand-color); }
.history-item .h-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}
.history-item .h-engines {
  font-size: 11px;
  color: var(--td-text-color-placeholder);
  background: rgba(0, 0, 0, 0.04);
  padding: 2px 8px;
  border-radius: 10px;
  white-space: nowrap;
}
.history-item .h-time {
  font-size: 12px;
  color: var(--td-text-color-placeholder);
  white-space: nowrap;
}
.history-empty {
  text-align: center;
  padding: 40px 20px;
  color: var(--td-text-color-placeholder);
}
.history-empty .empty-icon { font-size: 48px; margin-bottom: 12px; opacity: 0.4; }
.history-empty .empty-text { font-size: 14px; }

.history-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 40px 20px;
  color: var(--td-text-color-placeholder);
}
.history-loading .loading-spinner { margin-bottom: 12px; }

.history-btn {
  font-size: 13px;
  color: var(--td-text-color-secondary);
  cursor: pointer;
  padding: 5px 12px;
  background: rgba(255, 255, 255, 0.35);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 0.5px solid rgba(255, 255, 255, 0.5);
  border-radius: 20px;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  gap: 4px;
}
.history-btn:hover {
  background: rgba(255, 255, 255, 0.6);
  color: var(--td-brand-color);
}

@media (max-width: 768px) {
  .history-item { flex-wrap: wrap; }
  .history-item .h-keyword { flex: 1 1 100%; }
  .history-item .h-meta { width: 100%; justify-content: space-between; }
}

/* Responsive */
@media (max-width: 768px) {
  .header { padding: 0 16px; }
  .main-container { padding: 20px 12px; }
  .search-title { font-size: 24px; }
  .results-grid { 
    display: flex;
    flex-wrap: nowrap;
    overflow-x: auto;
    gap: 12px;
    padding-bottom: 8px;
    -webkit-overflow-scrolling: touch;
    scroll-snap-type: x proximity;
  }
  .result-column { 
    min-width: 300px;
    max-width: 300px;
    flex-shrink: 0;
    scroll-snap-align: start;
  }
  .search-input-wrap input { font-size: 16px; padding: 10px 12px; }
  .search-input-wrap .search-btn { padding: 8px 16px; font-size: 13px; }
  .engine-chip { padding: 5px 12px; font-size: 12px; }
}

/* Prevent iOS zoom on input focus */
@media (max-width: 768px) {
  .form-input, .search-input-wrap input, .login-card input {
    font-size: 16px !important;
  }
}
/* ============ Words List Modal ============ */
.words-modal .modal-container {
  max-width: 900px;
  max-height: 85vh;
}

.words-toolbar {
  display: flex;
  gap: 10px;
  margin-bottom: 12px;
  flex-wrap: wrap;
  align-items: center;
}

.words-search-box {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
  min-width: 200px;
  padding: 6px 12px;
  border: 1px solid var(--td-border-color, #e0e0e0);
  border-radius: 8px;
  background: var(--td-bg-color-container, #fff);
}
.words-search-box svg {
  flex-shrink: 0;
  color: var(--td-text-color-placeholder, #999);
}
.words-search-box input {
  flex: 1;
  border: none;
  outline: none;
  font-size: 13px;
  background: transparent;
  color: var(--td-text-color-primary, #333);
}
.words-search-box input::placeholder {
  color: var(--td-text-color-placeholder, #999);
}

.words-filter-select {
  padding: 6px 12px;
  border: 1px solid var(--td-border-color, #e0e0e0);
  border-radius: 8px;
  background: var(--td-bg-color-container, #fff);
  font-size: 13px;
  color: var(--td-text-color-primary, #333);
  cursor: pointer;
  outline: none;
}

.words-export-btn {
  padding: 6px 16px;
  border: 1px solid var(--td-brand-color, #0052D9);
  border-radius: 8px;
  background: var(--td-bg-color-container, #fff);
  color: var(--td-brand-color, #0052D9);
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}
.words-export-btn:hover {
  background: var(--td-brand-color, #0052D9);
  color: #fff;
}

/* Stats bar */
.words-stats {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  padding: 8px 0 12px;
  border-bottom: 1px solid var(--td-border-color, #e8e8e8);
  margin-bottom: 0;
  font-size: 12px;
}
.ws-stat {
  color: var(--td-text-color-secondary, #666);
}
.ws-stat strong {
  color: var(--td-brand-color, #0052D9);
  font-weight: 600;
}
.ws-tag {
  display: inline-block;
  padding: 2px 8px;
  background: var(--td-bg-color-secondarycontainer, #f0f0f0);
  border-radius: 4px;
  color: var(--td-text-color-secondary, #666);
  font-size: 11px;
}

/* Words Table */
.words-table-wrap {
  max-height: calc(85vh - 280px);
  overflow-y: auto;
}
.words-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
.words-table thead {
  position: sticky;
  top: 0;
  z-index: 1;
}
.words-table th {
  text-align: left;
  padding: 10px 12px;
  background: var(--td-bg-color-secondarycontainer, #f5f5f5);
  color: var(--td-text-color-secondary, #666);
  font-weight: 500;
  border-bottom: 2px solid var(--td-border-color, #e0e0e0);
  white-space: nowrap;
}
.words-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--td-border-color, #f0f0f0);
  color: var(--td-text-color-primary, #333);
  vertical-align: top;
}
.words-table tbody tr:hover {
  background: var(--td-bg-color-secondarycontainer-hover, #f8f8ff);
}

.wd-word {
  font-weight: 500;
  color: var(--td-brand-color, #0052D9);
  max-width: 280px;
  word-break: break-all;
}
.wd-keyword {
  color: var(--td-text-color-secondary, #888);
  font-size: 12px;
  max-width: 160px;
  word-break: break-all;
}
.wd-engine {
  display: inline-block;
  padding: 2px 8px;
  background: var(--td-brand-color-light, #e8f0fe);
  color: var(--td-brand-color, #0052D9);
  border-radius: 4px;
  font-size: 11px;
  white-space: nowrap;
}
.wd-time {
  color: var(--td-text-color-placeholder, #aaa);
  font-size: 12px;
  white-space: nowrap;
}

/* Words Pagination */
.words-pagination {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  padding: 12px 0 0;
  border-top: 1px solid var(--td-border-color, #e8e8e8);
  margin-top: 12px;
}
.wp-info {
  color: var(--td-text-color-secondary, #999);
  font-size: 12px;
  margin-right: auto;
}
.wp-btn {
  padding: 6px 16px;
  border: 1px solid var(--td-border-color, #d0d0d0);
  border-radius: 6px;
  background: var(--td-bg-color-container, #fff);
  color: var(--td-text-color-primary, #333);
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s;
}
.wp-btn:hover {
  border-color: var(--td-brand-color, #0052D9);
  color: var(--td-brand-color, #0052D9);
}

/* Words button in header */
.words-btn {
  margin-left: 4px;
}

/* Mobile responsive */
@media (max-width: 768px) {
  .words-modal .modal-container {
    max-width: 100%;
    max-height: 100vh;
    border-radius: 0;
  }
  .words-toolbar {
    flex-direction: column;
  }
  .words-search-box {
    width: 100%;
  }
  .words-table-wrap {
    max-height: calc(100vh - 340px);
  }
  .wd-word {
    max-width: 160px;
  }
  .wd-keyword {
    max-width: 100px;
  }
}