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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--tg-theme-bg-color, #fff);
  color: var(--tg-theme-text-color, #000);
  padding: 12px;
  line-height: 1.4;
}

.hidden {
  display: none !important;
}

#search-form {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}

.search-wrap {
  position: relative;
  flex: 1;
}

#search-input {
  width: 100%;
  padding: 10px 36px 10px 14px;
  border: 1px solid var(--tg-theme-hint-color, #ccc);
  border-radius: 8px;
  background: var(--tg-theme-secondary-bg-color, #f0f0f0);
  color: var(--tg-theme-text-color, #000);
  font-size: 16px;
  outline: none;
}

#search-input:focus {
  border-color: var(--tg-theme-button-color, #40a7e3);
}

#clear-btn {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  border: none;
  background: transparent;
  font-size: 20px;
  cursor: pointer;
  color: var(--tg-theme-hint-color, #999);
  padding: 4px;
  line-height: 1;
}

#search-btn {
  padding: 10px 20px;
  border: none;
  border-radius: 8px;
  background: var(--tg-theme-button-color, #40a7e3);
  color: var(--tg-theme-button-text-color, #fff);
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
}

#search-btn:active {
  opacity: 0.8;
}

#loading {
  text-align: center;
  padding: 24px;
  color: var(--tg-theme-hint-color, #999);
}

#error {
  padding: 12px;
  border-radius: 8px;
  background: rgba(255, 80, 80, 0.1);
  color: #e55;
  margin-bottom: 12px;
  text-align: center;
}

.book-card {
  padding: 14px;
  border-radius: 10px;
  background: var(--tg-theme-secondary-bg-color, #f5f5f5);
  margin-bottom: 10px;
  cursor: pointer;
  transition: opacity 0.15s;
}

.book-card:active {
  opacity: 0.7;
}

.book-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
}

.book-authors {
  font-size: 14px;
  color: var(--tg-theme-hint-color, #666);
  margin-bottom: 8px;
}

.book-actions {
  display: flex;
  gap: 6px;
}

.format-btn {
  padding: 6px 14px;
  border: none;
  border-radius: 6px;
  background: var(--tg-theme-button-color, #40a7e3);
  color: var(--tg-theme-button-text-color, #fff);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
}

.format-btn:active {
  opacity: 0.7;
}

#pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 16px 0;
}

.page-btn {
  padding: 8px 18px;
  border: none;
  border-radius: 8px;
  background: var(--tg-theme-button-color, #40a7e3);
  color: var(--tg-theme-button-text-color, #fff);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
}

.page-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

#page-info {
  font-size: 14px;
  color: var(--tg-theme-hint-color, #999);
}

#book-detail {
  padding: 8px 0;
}

#back-btn {
  padding: 8px 16px;
  border: none;
  border-radius: 8px;
  background: var(--tg-theme-secondary-bg-color, #e0e0e0);
  color: var(--tg-theme-text-color, #000);
  font-size: 14px;
  cursor: pointer;
  margin-bottom: 16px;
}

.detail-title {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 6px;
}

.detail-authors {
  font-size: 16px;
  color: var(--tg-theme-hint-color, #666);
  margin-bottom: 20px;
}

.detail-formats-label {
  font-size: 14px;
  color: var(--tg-theme-hint-color, #999);
  margin-bottom: 8px;
}

.detail-formats {
  display: flex;
  gap: 8px;
}

.status-msg {
  text-align: center;
  padding: 20px;
  color: var(--tg-theme-hint-color, #999);
}