/* ========== 基础重置与全局样式 ========== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", sans-serif;
  background: #f5f7fa;
  color: #333;
  min-height: 100vh;
  padding: 20px;
}

/* ========== 响应式容器 ========== */
.container {
  max-width: 700px;
  margin: 0 auto;
  background: #fff;
  border-radius: 12px;
  padding: 32px 28px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
}

/* ========== 标题 ========== */
h1 {
  text-align: center;
  font-size: 26px;
  margin-bottom: 6px;
  color: #1a1a2e;
}

.subtitle {
  text-align: center;
  color: #888;
  font-size: 14px;
  margin-bottom: 24px;
}

/* ========== 搜索区域 ========== */
.search-area {
  margin-bottom: 20px;
}

#searchInput {
  width: 100%;
  padding: 12px 16px;
  font-size: 16px;
  border: 2px solid #e0e0e0;
  border-radius: 8px;
  outline: none;
  transition: border-color 0.2s;
}

#searchInput:focus {
  border-color: #4a90d9;
}

.btn-row {
  display: flex;
  gap: 10px;
  margin-top: 12px;
  flex-wrap: wrap;
}

button {
  padding: 10px 20px;
  font-size: 15px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  background: #4a90d9;
  color: #fff;
  transition: background 0.2s;
}

button:hover {
  background: #357abd;
}

.btn-secondary {
  background: #f0ad4e;
}

.btn-secondary:hover {
  background: #ec971f;
}

.btn-danger {
  background: #d9534f;
}

.btn-danger:hover {
  background: #c9302c;
}

.btn-back {
  background: #999;
  font-size: 13px;
  padding: 6px 14px;
}

.btn-back:hover {
  background: #777;
}

.btn-link {
  background: none;
  color: #999;
  padding: 4px 8px;
  font-size: 12px;
}

.btn-link:hover {
  background: none;
  color: #666;
  text-decoration: underline;
}

/* ========== 结果区域 ========== */
#resultArea {
  margin-top: 16px;
}

.result-item {
  background: #f8f9fc;
  border-left: 4px solid #4a90d9;
  padding: 14px 18px;
  border-radius: 6px;
  margin-bottom: 12px;
}

.result-item .q {
  font-weight: 600;
  font-size: 15px;
  margin-bottom: 6px;
  color: #1a1a2e;
}

.result-item .a {
  font-size: 14px;
  color: #555;
  line-height: 1.6;
}

/* 无结果提示 */
.no-result {
  text-align: center;
  color: #999;
  padding: 24px;
  font-size: 15px;
  background: #fffbe6;
  border-radius: 8px;
  border: 1px solid #ffe58f;
}

/* ========== 管理入口 ========== */
.admin-entry {
  text-align: center;
  margin-top: 32px;
  padding-top: 16px;
  border-top: 1px solid #eee;
}

/* ========== 管理面板 ========== */
.admin-login-row {
  display: flex;
  gap: 10px;
  margin-top: 10px;
}

.admin-login-row input {
  flex: 1;
  padding: 10px 14px;
  font-size: 15px;
  border: 2px solid #e0e0e0;
  border-radius: 8px;
  outline: none;
}

.admin-login-row input:focus {
  border-color: #4a90d9;
}

.admin-section {
  background: #f8f9fc;
  padding: 18px;
  border-radius: 8px;
  margin-bottom: 16px;
}

.admin-section h2 {
  font-size: 17px;
  margin-bottom: 8px;
  color: #1a1a2e;
}

.hint {
  font-size: 13px;
  color: #888;
  margin: 6px 0;
}

.hint code {
  background: #e8e8e8;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 12px;
}

.error-msg {
  color: #d9534f;
  font-size: 14px;
  margin-top: 6px;
}

.info-msg {
  color: #5cb85c;
  font-size: 14px;
  margin-top: 6px;
}

#failedSearchesList {
  margin-top: 10px;
}

#failedSearchesList .fail-item {
  background: #fff;
  padding: 10px 14px;
  border-radius: 6px;
  margin-bottom: 6px;
  font-size: 14px;
  border: 1px solid #eee;
}

/* ========== 可折叠列表 ========== */
.admin-toolbar {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}

.btn-sm {
  font-size: 13px;
  padding: 5px 12px;
  border-radius: 6px;
  background: #888;
}

.btn-sm:hover {
  background: #666;
}

.admin-section-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.admin-section-header h2 {
  margin-bottom: 0;
}

.count-badge {
  background: #4a90d9;
  color: #fff;
  font-size: 12px;
  padding: 2px 8px;
  border-radius: 10px;
  font-weight: 600;
}

.collapsible-body {
  display: none;
  max-height: 300px;
  overflow-y: auto;
  border: 1px solid #e8e8e8;
  border-radius: 6px;
  padding: 8px;
  background: #fff;
}

.collapsible-body.expanded {
  display: block;
}

.collapsible-body .list-item {
  padding: 10px 12px;
  border-bottom: 1px solid #f0f0f0;
  font-size: 14px;
}

.collapsible-body .list-item:last-child {
  border-bottom: none;
}

.list-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.btn-del {
  background: none;
  color: #d9534f;
  font-size: 16px;
  padding: 2px 8px;
  border-radius: 4px;
  line-height: 1;
}

.btn-del:hover {
  background: #fce4e4;
}

.btn-clear {
  background: #e8e8e8;
  color: #666;
}

.btn-clear:hover {
  background: #d9534f;
  color: #fff;
}

/* ========== 搜索按钮加载状态 ========== */
#searchBtn.loading {
  pointer-events: none;
  opacity: 0.7;
}

#searchBtn .spinner {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.5s linear infinite;
  vertical-align: middle;
  margin-right: 6px;
}

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

/* ========== 移动端适配 ========== */
@media (max-width: 600px) {
  body {
    padding: 10px;
  }

  .container {
    padding: 20px 14px;
    border-radius: 8px;
  }

  h1 {
    font-size: 22px;
  }

  .btn-row {
    flex-direction: column;
  }

  .btn-row button {
    width: 100%;
  }

  #searchInput {
    font-size: 15px;
    padding: 10px 12px;
  }

  .admin-login-row {
    flex-direction: column;
  }
}