/* 大乃書齋 —— 溫暖書房風：米紙底、墨綠主色、襯線標題。支援深色模式。 */

:root {
  --bg: #f6f1e7;
  --card: #fffdf8;
  --card-alt: #faf5ea;
  --input-bg: #ffffff;
  --ink: #2d2a24;
  --muted: #6f6758;
  --green: #2f5d50;
  --green-dark: #234639;
  --on-green: #f4efe2;
  --accent: #b3541e;
  --line: #e2d9c8;
  --mark-bg: #f7e2b5;
  --danger-bg: #f0dbd3;
  --danger-ink: #93331b;
  --shadow: 0 2px 10px rgba(60, 50, 30, 0.08);
  --radius: 14px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1d211e;
    --card: #262b27;
    --card-alt: #2c322d;
    --input-bg: #1a1e1b;
    --ink: #e8e3d5;
    --muted: #a49c8a;
    --green: #4f8b78;
    --green-dark: #1c332b;
    --on-green: #e8e3d5;
    --accent: #d98a55;
    --line: #3a413b;
    --mark-bg: #6b5a2a;
    --danger-bg: #4a2f27;
    --danger-ink: #e8a58e;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.35);
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
  line-height: 1.65;
  min-height: 100vh;
  min-height: 100dvh;
}
button { font-family: inherit; }
.linklike { background: none; border: none; color: var(--green); text-decoration: underline; cursor: pointer; font-size: inherit; padding: 0; }

.boot { padding: 4rem; text-align: center; color: var(--muted); }

/* ---- 登入畫面 ---- */
.login-hero {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 1.2rem; padding: 2rem; text-align: center;
}
.login-hero h1 { font-size: 2.2rem; margin: 0; color: var(--green); letter-spacing: 0.12em; }
.login-hero p { color: var(--muted); max-width: 26em; margin: 0; }
.login-error { color: #c05555; font-weight: 600; }

/* ---- 版頭 ---- */
header.top {
  background: var(--green-dark); color: var(--on-green);
  padding: 0.7rem 1rem;
  padding-top: max(0.7rem, env(safe-area-inset-top));
  padding-left: max(1rem, env(safe-area-inset-left));
  padding-right: max(1rem, env(safe-area-inset-right));
  display: flex; align-items: center; gap: 1rem; flex-wrap: wrap;
  position: sticky; top: 0; z-index: 10;
}
header.top .brand { font-size: 1.15rem; font-weight: 700; letter-spacing: 0.15em; }
nav.tabs { display: flex; gap: 0.4rem; flex: 1; flex-wrap: wrap; }
nav.tabs button {
  background: transparent; border: 1px solid rgba(244, 239, 226, 0.35); color: var(--on-green);
  padding: 0.55rem 0.95rem; border-radius: 999px; cursor: pointer; font-size: 0.95rem;
  min-height: 44px;
}
nav.tabs button.active { background: var(--on-green); color: var(--green-dark); font-weight: 700; }
.userbox { font-size: 0.8rem; opacity: 0.85; display: flex; align-items: center; gap: 0.6rem; }
.userbox button { background: none; border: none; color: var(--on-green); text-decoration: underline; cursor: pointer; font-size: 0.85rem; min-height: 44px; padding: 0 0.4rem; }

.offline-bar {
  background: var(--accent); color: #fff; text-align: center;
  font-size: 0.85rem; padding: 0.4rem 1rem;
}

main {
  max-width: 1080px; margin: 0 auto;
  padding: 1.2rem 1rem 4rem;
  padding-left: max(1rem, env(safe-area-inset-left));
  padding-right: max(1rem, env(safe-area-inset-right));
}

/* ---- 工具列 ---- */
.toolbar { display: flex; gap: 0.6rem; flex-wrap: wrap; margin-bottom: 1rem; align-items: center; }
.toolbar input[type="search"], .toolbar select {
  padding: 0.55rem 0.8rem; border: 1px solid var(--line); border-radius: 10px;
  background: var(--input-bg); font-size: 1rem; color: var(--ink);
  min-height: 44px;
}
.toolbar input[type="search"] { flex: 1; min-width: 11rem; }
.chips { display: flex; gap: 0.4rem; flex-wrap: wrap; margin-bottom: 1rem; }
.chip {
  background: var(--card); border: 1px solid var(--line); border-radius: 999px;
  padding: 0.45rem 0.85rem; cursor: pointer; font-size: 0.9rem; color: var(--muted);
  min-height: 40px; display: inline-flex; align-items: center;
}
.chip.active { background: var(--green); border-color: var(--green); color: #fff; }

/* ---- 書卡牆 ---- */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 1rem; }
.book-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 0.9rem; cursor: pointer;
  display: flex; gap: 0.8rem; transition: transform 0.12s ease;
}
.book-card:hover { transform: translateY(-2px); }
.book-card .cover {
  width: 64px; height: 92px; flex: none; border-radius: 6px; object-fit: cover;
  background: linear-gradient(160deg, var(--green), var(--green-dark));
  color: var(--on-green); display: flex; align-items: center; justify-content: center;
  font-size: 0.7rem; text-align: center; padding: 2px; overflow: hidden;
}
.book-card h3 { margin: 0 0 0.15rem; font-size: 1rem; line-height: 1.35; }
.book-card .meta { font-size: 0.78rem; color: var(--muted); margin: 0; }
.badge {
  display: inline-block; font-size: 0.7rem; padding: 0.05rem 0.5rem; border-radius: 999px;
  background: var(--card-alt); border: 1px solid var(--line); color: var(--muted); margin-right: 0.25rem; margin-top: 0.3rem;
}
.badge.topic { background: color-mix(in srgb, var(--green) 16%, var(--card)); color: var(--green); border-color: transparent; }
.badge.status-reading { color: var(--accent); }
.badge.status-done { color: #4f8b57; }
.badge.status-lost, .badge.status-given { opacity: 0.7; }
.badge.lent { background: color-mix(in srgb, var(--accent) 18%, var(--card)); color: var(--accent); border-color: transparent; }
.badge.stale { background: var(--mark-bg); color: var(--ink); border-color: transparent; }

.empty { text-align: center; color: var(--muted); padding: 3rem 1rem; }

/* ---- 詳細頁 ---- */
.detail { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); padding: 1.4rem; }
.detail .head { display: flex; gap: 1.2rem; flex-wrap: wrap; }
.detail .cover-lg {
  width: 130px; height: 186px; border-radius: 8px; object-fit: cover; flex: none;
  background: linear-gradient(160deg, var(--green), var(--green-dark));
  color: var(--on-green); display: flex; align-items: center; justify-content: center; text-align: center; padding: 6px;
}
.detail h2 { margin: 0 0 0.3rem; color: var(--green); }
.detail .facts { font-size: 0.9rem; color: var(--muted); margin: 0.2rem 0; }
.detail .lent-fact { color: var(--accent); font-weight: 600; }
.detail section { margin-top: 1.3rem; }
.detail section h4 {
  margin: 0 0 0.5rem; font-size: 0.95rem; color: var(--green);
  border-left: 4px solid var(--green); padding-left: 0.5rem;
}
.detail section h4 small { font-weight: 400; color: var(--muted); }
.detail .prose { white-space: pre-wrap; font-size: 0.95rem; }
.external-desc { background: var(--card-alt); border: 1px dashed var(--line); border-radius: 10px; padding: 0.7rem 0.9rem; }
.external-desc h4 { border-left-color: var(--muted); color: var(--muted); }
.hl-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 0.6rem; }
.hl-list li {
  background: var(--card-alt); border: 1px solid var(--line); border-radius: 10px; padding: 0.6rem 0.8rem;
  font-size: 0.92rem; display: flex; justify-content: space-between; gap: 0.8rem; align-items: flex-start;
}
.hl-list .hl-body { display: flex; flex-direction: column; gap: 0.3rem; }
.hl-list .src { font-size: 0.75rem; color: var(--muted); white-space: nowrap; }
.my-take { color: var(--green); font-size: 0.88em; }
.gist-mark { color: var(--muted); font-style: normal; font-size: 0.85em; }
.hl-tags .badge { margin-top: 0; }
.log-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 0.4rem; font-size: 0.92rem; }
.log-list li { padding: 0.3rem 0; border-bottom: 1px dashed var(--line); }
.log-date { color: var(--muted); font-size: 0.8em; margin-right: 0.6rem; }
.rel-list { list-style: none; margin: 0; padding: 0; }
.rel-list li { padding: 0.35rem 0; border-bottom: 1px dashed var(--line); font-size: 0.92rem; }
.rel-list a { color: var(--green); font-weight: 600; cursor: pointer; text-decoration: underline; }

.btn-row { display: flex; gap: 0.6rem; margin-top: 1.4rem; flex-wrap: wrap; }
.btn {
  border: none; border-radius: 10px; padding: 0.6rem 1.2rem; cursor: pointer; font-size: 0.95rem;
  background: var(--green); color: #fff; min-height: 44px;
}
.btn.secondary { background: var(--card-alt); color: var(--ink); border: 1px solid var(--line); }
.btn.danger { background: var(--danger-bg); color: var(--danger-ink); }
.btn.small { padding: 0.45rem 0.8rem; font-size: 0.85rem; border-radius: 8px; min-height: 44px; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* ---- 表單 ---- */
form.book-form { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); padding: 1.4rem; }
.isbn-row { background: color-mix(in srgb, var(--green) 8%, var(--card)); border-radius: 10px; padding: 0.8rem; margin-bottom: 1.2rem; }
.isbn-row strong { display: block; margin-bottom: 0.4rem; }
.isbn-controls { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.isbn-controls input { flex: 1 1 12rem; min-width: 0; }
.isbn-hint { width: 100%; font-size: 0.82rem; color: var(--muted); margin: 0.4rem 0 0; }
.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 0.9rem; }
.field { display: flex; flex-direction: column; gap: 0.25rem; }
.field.wide { grid-column: 1 / -1; }
.field label { font-size: 0.85rem; color: var(--muted); font-weight: 600; }
.field input, .field select, .field textarea, .isbn-controls input,
.hl-item input, .hl-item select, .hl-item textarea,
.rel-item input, .rel-item select, .log-item input, .log-item textarea {
  padding: 0.55rem 0.7rem; border: 1px solid var(--line); border-radius: 8px;
  font-size: 1rem; /* ≥16px：iOS 對焦才不會自動縮放 */
  background: var(--input-bg); color: var(--ink); font-family: inherit;
  min-height: 44px;
}
.field textarea, .hl-item textarea, .log-item textarea { resize: vertical; min-height: 44px; }
.tag-editor { display: flex; gap: 0.4rem; flex-wrap: wrap; align-items: center; border: 1px solid var(--line); border-radius: 8px; padding: 0.4rem; background: var(--input-bg); }
.tag-editor .tag { background: color-mix(in srgb, var(--green) 16%, var(--card)); color: var(--green); border-radius: 999px; padding: 0.35rem 0.3rem 0.35rem 0.7rem; font-size: 0.9rem; display: inline-flex; align-items: center; }
.tag-editor .tag button { background: none; border: none; cursor: pointer; color: var(--green); font-weight: 700; font-size: 1rem; padding: 0.2rem 0.55rem; min-height: 32px; }
.tag-editor input { border: none; outline: none; flex: 1; min-width: 8rem; font-size: 1rem; padding: 0.4rem 0.2rem; background: transparent; color: var(--ink); min-height: 40px; }
.hl-editor, .rel-editor, .log-editor { display: flex; flex-direction: column; gap: 0.5rem; }
.hl-item { display: flex; gap: 0.5rem; align-items: stretch; border: 1px solid var(--line); border-radius: 10px; padding: 0.5rem; background: var(--card-alt); }
.hl-main { flex: 1; display: flex; flex-direction: column; gap: 0.4rem; min-width: 0; }
.hl-side { display: flex; flex-direction: column; gap: 0.4rem; width: 9.5rem; flex: none; }
.rel-item, .log-item { display: flex; gap: 0.5rem; align-items: flex-start; flex-wrap: wrap; }
.rel-item select { flex: 1 1 12rem; min-width: 0; }
.rel-item input { flex: 1.4 1 12rem; min-width: 0; }
.log-item input[type="date"] { flex: none; width: 10.5rem; }
.log-item textarea { flex: 1 1 14rem; min-width: 0; }

/* 儲存鈕吸底：長表單不用滑到最底 */
.form-actions {
  position: sticky; bottom: 0; background: var(--card);
  padding: 0.7rem 0 calc(0.4rem + env(safe-area-inset-bottom));
  margin-top: 1rem; border-top: 1px solid var(--line); z-index: 5;
}

/* ---- 主題檢索 ---- */
.search-hero { text-align: center; margin: 0.5rem 0 1.5rem; }
.search-hero input {
  width: min(560px, 100%); font-size: 1.1rem; padding: 0.75rem 1.1rem;
  border: 2px solid var(--green); border-radius: 999px; background: var(--card); color: var(--ink);
  min-height: 48px;
}
.search-hero p { color: var(--muted); font-size: 0.88rem; }
.result-section h3 { color: var(--green); border-bottom: 2px solid var(--line); padding-bottom: 0.3rem; display: flex; justify-content: space-between; align-items: center; gap: 0.6rem; flex-wrap: wrap; }
.quote-card {
  background: var(--card); border: 1px solid var(--line); border-left: 4px solid var(--accent);
  border-radius: 10px; padding: 0.8rem 1rem; margin-bottom: 0.7rem;
}
.quote-card .q { font-size: 0.95rem; margin: 0 0 0.35rem; }
.quote-card .my-take { display: block; margin: 0 0 0.35rem; }
.quote-card .src { font-size: 0.8rem; color: var(--muted); display: flex; justify-content: space-between; gap: 0.5rem; flex-wrap: wrap; align-items: center; }
mark { background: var(--mark-bg); color: var(--ink); padding: 0 2px; border-radius: 3px; }

.toast {
  position: fixed; left: 50%; transform: translateX(-50%);
  bottom: calc(1.2rem + env(safe-area-inset-bottom));
  background: var(--green-dark); color: var(--on-green); padding: 0.55rem 1.2rem; border-radius: 999px;
  box-shadow: var(--shadow); font-size: 0.9rem; z-index: 50; opacity: 0; transition: opacity 0.25s;
  pointer-events: none; max-width: min(90vw, 32rem); text-align: center;
}
.toast.show { opacity: 1; }

/* ---- 條碼掃描覆蓋層 ---- */
.scan-overlay {
  position: fixed; inset: 0; z-index: 100; background: rgba(0, 0, 0, 0.9);
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 1rem;
  padding: 1rem; padding-bottom: calc(1rem + env(safe-area-inset-bottom));
}
.scan-overlay video { width: min(92vw, 560px); border-radius: 12px; }
.scan-overlay p { color: #fff; margin: 0; }

/* ---- 窄螢幕 ---- */
@media (max-width: 640px) {
  header.top { gap: 0.4rem 0.6rem; padding-bottom: 0.5rem; }
  header.top .brand { font-size: 1rem; letter-spacing: 0.08em; }
  .user-email { display: none; } /* email 太長，窄螢幕只留登出 */
  nav.tabs { order: 3; flex-basis: 100%; }
  nav.tabs button { flex: 1; padding: 0.5rem 0.3rem; font-size: 0.9rem; }
  .detail .head { flex-direction: column; align-items: center; text-align: center; }
  .isbn-controls { flex-direction: column; }
  /* flex-basis 在直排時會變成「高度」，必須歸零，不然輸入框會撐成巨大方塊 */
  .isbn-controls input, .isbn-controls .btn { width: 100%; flex: none; }
  .hl-item { flex-direction: column; }
  .hl-side { flex-direction: row; flex-wrap: wrap; width: 100%; }
  .hl-side input[data-hl-page] { width: 6rem; flex: none; }
  .hl-side input[data-hl-tags] { flex: 1; min-width: 8rem; }
  .toolbar .btn { flex: 1; }
}