/* ============================================================
   Wikibook Theme — Components
   Buttons, tags, covers, cards, forms, tabs
   ============================================================ */

/* --- Buttons ------------------------------------------------ */
.wb-btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 6px; padding: 10px 16px;
  border: 1px solid var(--wb-line);
  background: #fff;
  font-size: 13px; font-weight: 500;
  transition: all 0.15s;
  cursor: pointer;
}
.wb-btn:hover { border-color: var(--wb-ink); }
.wb-btn--primary {
  background: var(--wb-accent); color: #fff;
  border-color: var(--wb-accent); font-weight: 700;
}
.wb-btn--primary:hover { background: var(--wb-accent-hover); border-color: var(--wb-accent-hover); }
.wb-btn--dark {
  background: var(--wb-ink); color: #fff; border-color: var(--wb-ink); font-weight: 600;
}

/* --- Tags --------------------------------------------------- */
.wb-tag {
  display: inline-block; padding: 3px 8px;
  font-family: var(--wb-mono); font-size: 9px; letter-spacing: 1px; font-weight: 700;
}
.wb-tag--new { background: var(--wb-accent); color: #fff; }
.wb-tag--best { background: var(--wb-ink); color: #fff; }
.wb-tag--cat { border: 1px solid var(--wb-line); padding: 3px 8px; color: var(--wb-mute); }

/* --- Book cover -------------------------------------------- */
/* 실물 표지 이미지(.wb-cover__img)를 우선 표시하고, 이미지가 없거나 로드에
   실패하면(.is-fallback) 그래픽 커버(.wb-cover__fb)로 대체한다.
   Sizes controlled by .wb-cover--{xs|sm|md|lg|xl|xxl} modifiers. */
.wb-cover {
  position: relative; overflow: hidden;
  box-shadow: 0 1px 2px rgba(0,0,0,.08), 0 8px 24px rgba(0,0,0,.12);
  flex-shrink: 0;
  display: block;
  background: var(--wb-panel-2);
  /* 표지는 188:240 비율 박스로 통일한다. 폭만 컨텍스트(변형 클래스)별로 지정하고
     높이는 비율로 자동 계산하며, 이미지는 박스를 가득 채운다(상하 여백·레터박스 없음).
     원본 비율이 달라 약간 늘어나/좁아져도 지정 크기에 맞춘다. */
  aspect-ratio: 188 / 240;
}
.wb-cover__img {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: fill; display: block;
  outline: 1px solid #c6c6c6;
  outline-offset: -1px;
}
.wb-cover__fb {
  display: none;
  position: absolute; inset: 0;
  background: var(--cv-bg, var(--wb-ink));
  color: #fff;
}
.wb-cover.is-fallback .wb-cover__fb { display: block; }
/* 시안 커버의 대각선 장식 (shared.jsx BookCover의 lines SVG 대응) */
.wb-cover__fb::after {
  content: ""; position: absolute; top: 40%; right: -10%; width: 70%; height: 60%;
  background: repeating-linear-gradient(135deg, transparent 0 7px, var(--cv-fg, var(--wb-accent)) 7px 8px);
  opacity: 0.15; pointer-events: none;
}
.wb-cover__stripe { position: absolute; top: 0; left: 0; right: 0; height: 4%; background: var(--cv-fg, var(--wb-accent)); }
.wb-cover__title {
  position: absolute; top: 12%; left: 10%; right: 10%;
  font-weight: 700; letter-spacing: -0.3px; line-height: 1.15; word-break: keep-all;
}
.wb-cover__author {
  position: absolute; bottom: 8%; left: 10%; right: 10%;
  opacity: 0.85; letter-spacing: 0.3px;
}
.wb-cover__divider { display: block; width: 20px; height: 1px; margin-top: 4px; background: var(--cv-fg, var(--wb-accent)); }

/* E-book badge — top-right corner, sits above cover content */
.wb-cover__ebook {
  position: absolute; top: 6px; right: 6px; z-index: 2;
  display: inline-flex; align-items: center; gap: 3px;
  padding: 3px 5px;
  background: #fff; color: #111;
  font-family: var(--wb-font); font-size: 11px; font-weight: 700;
  letter-spacing: 0; line-height: 1;
  box-shadow: 0 1px 3px rgba(0,0,0,.2);
}
.wb-cover__ebook-icon { display: block; flex-shrink: 0; }
.wb-cover__ebook-label { text-transform: uppercase; }

/* In xs/sm covers, hide the text label — icon only */
.wb-cover--xs .wb-cover__ebook,
.wb-cover--sm .wb-cover__ebook {
  padding: 2px; gap: 0;
}
.wb-cover--xs .wb-cover__ebook-label,
.wb-cover--sm .wb-cover__ebook-label { display: none; }
.wb-cover--xs .wb-cover__ebook-icon { width: 8px; height: 8px; }
.wb-cover--sm .wb-cover__ebook-icon { width: 9px; height: 9px; }
.wb-cover__ebook-icon { width: 10px; height: 10px; }
.wb-cover--lg .wb-cover__ebook { padding: 4px 7px; font-size: 10px; }
.wb-cover--lg .wb-cover__ebook-icon { width: 11px; height: 11px; }
.wb-cover--xl .wb-cover__ebook { padding: 5px 8px; font-size: 11px; top: 10px; right: 10px; }
.wb-cover--xl .wb-cover__ebook-icon { width: 13px; height: 13px; }
.wb-cover--xxl .wb-cover__ebook { padding: 7px 11px; font-size: 13px; top: 14px; right: 14px; gap: 5px; }
.wb-cover--xxl .wb-cover__ebook-icon { width: 16px; height: 16px; }

.wb-cover--xs { width: 46px; font-size: 6px; }
.wb-cover--xs .wb-cover__author { font-size: 5px; }
.wb-cover--sm { width: 92px; font-size: 10px; }
.wb-cover--sm .wb-cover__author { font-size: 7px; }
.wb-cover--md { width: 132px; font-size: 13px; }
.wb-cover--md .wb-cover__author { font-size: 9px; }
.wb-cover--lg { width: 180px; font-size: 16px; }
.wb-cover--lg .wb-cover__author { font-size: 10px; }
.wb-cover--xl { width: 240px; font-size: 20px; }
.wb-cover--xl .wb-cover__author { font-size: 12px; }
.wb-cover--xxl { width: 440px; font-size: 30px; }
.wb-cover--xxl .wb-cover__author { font-size: 16px; }

/* --- Book card (grid item) --------------------------------- */
/* 카드 자체는 <article>, 내부 링크(.wb-book-card__link)가 콘텐츠를 세로로 쌓는다. */
.wb-book-card { display: flex; flex-direction: column; gap: 10px; }
.wb-book-card__link { display: flex; flex-direction: column; flex: 1; gap: 0; color: inherit; cursor: pointer; }
/* 호버 시 위치 이동(translateY) 제거 — 그림자 강조만 유지(홈 카드와 동작 통일) */
.wb-book-card:hover .wb-cover { box-shadow: 0 2px 4px rgba(0,0,0,.08), 0 16px 32px rgba(0,0,0,.16); }
.wb-book-card .wb-cover { transition: box-shadow .15s; }
.wb-book-card__meta { font-family: var(--wb-mono); font-size: 10px; color: var(--wb-mute); letter-spacing: 0.5px; }
.wb-book-card__title { font-size: 13px; font-weight: 700; line-height: 1.35; letter-spacing: -0.2px; word-break: keep-all; }
.wb-book-card__author { font-size: 11px; color: var(--wb-mute); }
.wb-book-card__price { font-size: 13px; font-weight: 700; margin-top: 2px; font-family: var(--wb-mono); }

/* --- List row (catalog list view) -------------------------- */
.wb-book-row {
  display: grid; grid-template-columns: 60px 1fr 140px 100px;
  gap: 20px; padding: 14px 0; border-bottom: 1px solid var(--wb-line); align-items: center;
  cursor: pointer;
}
.wb-book-row:hover { background: var(--wb-panel); }

/* --- Tabs --------------------------------------------------- */
.wb-tabs {
  position: sticky; top: 98px; background: #fff; border-bottom: 1px solid var(--wb-line);
  z-index: 10; padding: 0 32px; display: flex;
}
.wb-tab {
  padding: 16px 18px; font-size: 13px; font-weight: 500;
  color: var(--wb-ink); border-bottom: 2px solid transparent;
  margin-bottom: -1px; cursor: pointer;
}
.wb-tab.is-active { font-weight: 700; color: var(--wb-accent); border-bottom-color: var(--wb-accent); }

/* --- Forms -------------------------------------------------- */
.wb-field { display: flex; flex-direction: column; gap: 6px; }
.wb-field label { font-size: 11px; color: var(--wb-mute); font-family: var(--wb-mono); letter-spacing: 1px; text-transform: uppercase; }
.wb-input, .wb-textarea, .wb-select {
  width: 100%; padding: 11px 12px; border: 1px solid var(--wb-line); background: #fff;
  font-size: 13px; font-family: inherit;
}
.wb-textarea { resize: vertical; min-height: 120px; }

/* --- FAQ --------------------------------------------------- */
.wb-faq-item { border-bottom: 1px solid var(--wb-line); }
.wb-faq-q {
  width: 100%; padding: 18px 0; background: none; border: none; text-align: left;
  display: flex; justify-content: space-between; align-items: center; gap: 16px;
  font-size: 14px; font-weight: 600; color: var(--wb-ink);
}
.wb-faq-a { padding: 0 0 18px; font-size: 13px; color: var(--wb-mute); line-height: 1.7; display: none; }
.wb-faq-item.is-open .wb-faq-a { display: block; }
.wb-faq-item.is-open .wb-faq-q__icon { transform: rotate(45deg); }
.wb-faq-q__icon { font-family: var(--wb-mono); font-size: 18px; color: var(--wb-accent); transition: transform .15s; }

/* --- Retailer row ------------------------------------------- */
.wb-retailers { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.wb-retailer {
  display: flex; align-items: center; justify-content: center;
  padding: 13px 8px; border: 1px solid; background: #fff; text-decoration: none;
}
.wb-retailer:hover { background: var(--wb-panel); }
.wb-retailer__label { font-size: 13px; font-weight: 700; }