/* manual-library — スマホで読むことを前提にした設計
   NFR-USE-002: 本文16px以上・行間1.7以上・タップ対象44px以上 */

:root {
  --bg: #f7f6f3;
  --surface: #ffffff;
  --ink: #1f2328;
  --ink-sub: #5b636e;
  --line: #e2e0da;
  --accent: #2f6f4f;
  --accent-ink: #ffffff;
  --danger: #b3261e;
  --radius: 12px;
  --tap: 44px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16181c;
    --surface: #1e2125;
    --ink: #e8eaed;
    --ink-sub: #a3aab4;
    --line: #333840;
    --accent: #6bbf92;
    --accent-ink: #10241a;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Noto Sans JP",
               "Yu Gothic", Meiryo, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  overflow-x: hidden; /* ACC-FR-LIB-001b: 横スクロールを出さない */
}

.view { max-width: 1100px; margin: 0 auto; padding: 0 16px 64px; }

/* ---------- ログイン ---------- */
.login-box {
  max-width: 380px; margin: 18vh auto 0; background: var(--surface);
  border: 1px solid var(--line); border-radius: var(--radius); padding: 28px 22px;
}
.login-title { font-size: 21px; margin: 0 0 6px; }
.login-lead { color: var(--ink-sub); font-size: 14px; margin: 0 0 18px; }
#login-form { display: flex; flex-direction: column; gap: 12px; }

input[type="password"], input[type="search"], input[type="text"] {
  width: 100%; min-height: var(--tap); padding: 10px 14px;
  font-size: 16px; /* iOSで自動ズームさせないため16px未満にしない */
  color: var(--ink); background: var(--bg);
  border: 1px solid var(--line); border-radius: 10px;
}
input:focus { outline: 2px solid var(--accent); outline-offset: 1px; }

.btn-primary, .btn-ghost, .btn-icon {
  min-height: var(--tap); font-size: 15px; border-radius: 10px;
  cursor: pointer; font-family: inherit;
}
.btn-primary {
  background: var(--accent); color: var(--accent-ink); border: none;
  padding: 0 18px; font-weight: 600;
}
.btn-ghost {
  background: transparent; color: var(--ink); border: 1px solid var(--line);
  padding: 0 14px;
}
.btn-icon {
  min-width: var(--tap); background: transparent; color: var(--ink);
  border: none; font-size: 20px; line-height: 1;
}
.error { color: var(--danger); font-size: 14px; margin: 12px 0 0; }
.status { color: var(--ink-sub); font-size: 15px; padding: 28px 4px; text-align: center; }

/* ---------- 上部バー ---------- */
.topbar {
  position: sticky; top: 0; z-index: 20; background: var(--bg);
  padding: 12px 0 8px; display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
}
.topbar-title {
  font-size: 18px; margin: 0; flex: 0 0 auto;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.search-wrap { position: relative; flex: 1 1 200px; display: flex; align-items: center; }
.search-wrap input { padding-right: 44px; }
#search-clear { position: absolute; right: 0; }

.reader-bar { border-bottom: 1px solid var(--line); flex-wrap: nowrap; }
.reader-bar .topbar-title { flex: 1 1 auto; font-size: 16px; }

/* ---------- 棚 ---------- */
.shelf-bar {
  display: flex; gap: 8px; overflow-x: auto; padding: 4px 0 10px;
  scrollbar-width: none;
}
.shelf-bar::-webkit-scrollbar { display: none; }
.shelf-chip {
  flex: 0 0 auto; min-height: 36px; padding: 0 14px; border-radius: 999px;
  border: 1px solid var(--line); background: var(--surface); color: var(--ink);
  font-size: 14px; white-space: nowrap; cursor: pointer;
}
.shelf-chip[aria-pressed="true"] {
  background: var(--accent); color: var(--accent-ink); border-color: var(--accent);
}
.shelf-chip .count { opacity: .7; margin-left: 6px; font-size: 12px; }

.toolbar {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px; padding: 4px 0 14px; flex-wrap: wrap;
}
.sort-label { font-size: 14px; color: var(--ink-sub); display: flex; align-items: center; gap: 6px; }
#sort-select {
  min-height: 36px; font-size: 15px; font-family: inherit;
  background: var(--surface); color: var(--ink);
  border: 1px solid var(--line); border-radius: 8px; padding: 0 8px;
}

/* ---------- 本棚のグリッド ---------- */
.grid {
  display: grid; gap: 14px;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
}
@media (max-width: 380px) {
  .grid { grid-template-columns: repeat(auto-fill, minmax(135px, 1fr)); }
}

.card {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); overflow: hidden;
  display: flex; flex-direction: column; cursor: pointer; text-align: left;
  padding: 0; font-family: inherit; color: var(--ink);
}
.card:active { transform: scale(.99); }
.card-cover {
  width: 100%; aspect-ratio: 16 / 10; object-fit: cover;
  background: var(--bg); display: block;
}
.card-cover-empty {
  width: 100%; aspect-ratio: 16 / 10; background: var(--bg);
  display: flex; align-items: center; justify-content: center;
  color: var(--ink-sub); font-size: 12px;
}
.card-body { padding: 10px 12px 12px; }
.card-title {
  font-size: 14px; line-height: 1.5; font-weight: 600; margin: 0 0 6px;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
}
.card-meta { font-size: 12px; color: var(--ink-sub); display: flex; gap: 8px; flex-wrap: wrap; }
.card-shelves { margin-top: 6px; display: flex; gap: 4px; flex-wrap: wrap; }
.tag {
  font-size: 11px; padding: 2px 8px; border-radius: 999px;
  background: var(--bg); border: 1px solid var(--line); color: var(--ink-sub);
}
.btn-more { display: block; width: 100%; margin: 20px 0 0; }

/* ---------- 検索結果 ---------- */
.result {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 14px 16px; margin-bottom: 10px; cursor: pointer; width: 100%;
  text-align: left; font-family: inherit; color: var(--ink);
}
.result-title { font-size: 15px; font-weight: 600; margin: 0 0 6px; }
.result-snippet { font-size: 14px; color: var(--ink-sub); line-height: 1.6; margin: 0; }
.result-snippet mark { background: rgba(111, 191, 146, .35); color: inherit; padding: 0 2px; }

/* ---------- ビューア ---------- */
.reader-body { padding: 8px 0 40px; }
.reader-body h1 { font-size: 20px; line-height: 1.5; margin: 28px 0 10px; }
.reader-body h2 {
  font-size: 18px; line-height: 1.5; margin: 32px 0 10px;
  padding-top: 12px; border-top: 1px solid var(--line);
}
.reader-body h3 { font-size: 16px; margin: 22px 0 8px; }
.reader-body p { font-size: 16px; line-height: 1.8; margin: 0 0 14px; }
.reader-body img {
  max-width: 100%; height: auto; display: block; margin: 12px 0 18px;
  border: 1px solid var(--line); border-radius: 8px; background: var(--surface);
}
.reader-body img.missing {
  min-height: 60px; padding: 16px; font-size: 13px; color: var(--ink-sub);
}
.reader-body pre {
  overflow-x: auto; background: var(--surface); border: 1px solid var(--line);
  border-radius: 8px; padding: 12px; font-size: 13px;
}
.reader-body table { display: block; overflow-x: auto; max-width: 100%; border-collapse: collapse; }
.reader-body td, .reader-body th { border: 1px solid var(--line); padding: 6px 10px; font-size: 14px; }
.reader-body :target { scroll-margin-top: 70px; }
.hit { background: rgba(111, 191, 146, .3); }

.resume {
  position: sticky; top: 56px; z-index: 15; display: flex; align-items: center;
  gap: 8px; padding: 10px 0;
}
.btn-resume { flex: 1 1 auto; }

.toc {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 10px 6px; margin: 8px 0 4px; max-height: 55vh; overflow-y: auto;
}
.toc a {
  display: block; min-height: var(--tap); line-height: var(--tap);
  padding: 0 12px; color: var(--ink); text-decoration: none; font-size: 15px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  border-radius: 8px;
}
.toc a:active { background: var(--bg); }

.reader-meta {
  border-top: 1px solid var(--line); padding: 16px 0 0;
  font-size: 14px; color: var(--ink-sub);
}
.reader-meta a { color: var(--accent); }

/* ---------- 使用量 ---------- */
.usage {
  margin-top: 36px; padding: 14px 0 0; border-top: 1px solid var(--line);
  font-size: 13px; color: var(--ink-sub);
}
.usage.warn { color: var(--danger); font-weight: 600; }

/* ---------- モーダル ---------- */
.modal {
  position: fixed; inset: 0; z-index: 50; background: rgba(0,0,0,.45);
  display: flex; align-items: center; justify-content: center; padding: 16px;
}
.modal-box {
  background: var(--surface); border-radius: var(--radius); padding: 20px;
  width: 100%; max-width: 420px; max-height: 82vh; overflow-y: auto;
}
.modal-box h2 { font-size: 17px; margin: 0 0 14px; }
.modal-actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 18px; }
.check-row {
  display: flex; align-items: center; gap: 10px; min-height: var(--tap);
  font-size: 15px; cursor: pointer;
}
.check-row input { width: 20px; height: 20px; }
.modal-hint { font-size: 13px; color: var(--ink-sub); margin: 0 0 10px; }