@import url('https://fonts.googleapis.com/css2?family=Source+Serif+4:opsz,wght@8..60,400;8..60,600&family=IBM+Plex+Sans:wght@400;500;600&family=IBM+Plex+Mono:wght@400;500&display=swap');

:root {
  --paper: #f4f5f0;
  --paper-raised: #ffffff;
  --ink: #1b2420;
  --ink-soft: #4b564e;
  --ink-faint: #838d7f;
  --accent: #2d5f5b;
  --accent-ink: #ffffff;
  --accent-warm: #b8843c;
  --rule: #d9d6c7;
  --rule-soft: #e7e4d7;
  --shadow: 220 15% 25%;
  --error: #b8483c;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #14181a;
    --paper-raised: #1c2224;
    --ink: #e7e6de;
    --ink-soft: #a8ada3;
    --ink-faint: #6c756d;
    --accent: #6fbfb0;
    --accent-ink: #0e1a18;
    --accent-warm: #d9a75c;
    --rule: #2a3234;
    --rule-soft: #222829;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: 'IBM Plex Sans', -apple-system, 'Segoe UI', sans-serif;
  min-height: 100vh;
}

.app {
  display: flex;
  max-width: 900px;
  margin: 0 auto;
  min-height: 100vh;
}

/* ---- 左側分類欄：像卡片櫃抽屜標籤 ---- */
.sidebar {
  width: 168px;
  flex-shrink: 0;
  padding: 56px 0 40px 20px;
  display: flex;
  flex-direction: column;
}

.sidebar h1 {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin: 0 0 28px;
}

.drawer-label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin: 0 0 10px;
}

.drawers {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.drawer {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 13.5px;
  color: var(--ink-soft);
  padding: 9px 12px;
  border-radius: 3px 0 0 3px;
  cursor: pointer;
  position: relative;
}

.drawer .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  flex-shrink: 0;
  background: var(--dot-color, var(--ink-faint));
}

.drawer .dot.all { background: var(--ink-faint); }

.drawer .n {
  margin-left: auto;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  color: var(--ink-faint);
}

.drawer:hover { background: var(--paper-raised); }

.drawer.active {
  background: var(--paper-raised);
  color: var(--ink);
  font-weight: 500;
  box-shadow: inset 3px 0 0 var(--accent);
}

.drawer.active .n { color: var(--ink-soft); }

/* ---- 主要內容區 ---- */
.main {
  flex: 1;
  min-width: 0;
  padding: 56px 28px 80px 32px;
  border-left: 1px solid var(--rule);
}

.main-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 28px;
}

.main-head h2 {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin: 0;
  font-weight: 500;
}

/* ---- 輸入區：像圖書館借閱單 ---- */
.intake {
  background: var(--paper-raised);
  border: 1px solid var(--rule);
  border-radius: 3px;
  padding: 22px 22px 20px;
  box-shadow: 0 1px 2px hsl(var(--shadow) / 0.06);
}

.intake-label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  display: block;
  margin-bottom: 10px;
}

.intake-row {
  display: flex;
  gap: 10px;
}

.intake-row input {
  flex: 1;
  min-width: 0;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--rule);
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 15px;
  color: var(--ink);
  padding: 8px 2px;
}

.intake-row input::placeholder { color: var(--ink-faint); }
.intake-row input:focus { outline: none; border-bottom-color: var(--accent); }

.intake-row button {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: 0.06em;
  background: var(--accent);
  color: var(--accent-ink);
  border: none;
  border-radius: 2px;
  padding: 0 20px;
  cursor: pointer;
  white-space: nowrap;
}

.intake-row button:hover { filter: brightness(1.08); }
.intake-row button:disabled { opacity: 0.5; cursor: not-allowed; filter: none; }

.intake-hint {
  margin: 12px 0 0;
  font-size: 12.5px;
  color: var(--ink-faint);
}

.intake-hint.error { color: var(--error); }

/* ---- 結果小卡 ---- */
.result-eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 40px 0 12px;
}

.result-eyebrow .line {
  flex: 1;
  height: 1px;
  background: var(--rule);
}

.result-eyebrow span {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.card {
  position: relative;
  background: var(--paper-raised);
  border: 1px solid var(--rule);
  border-radius: 3px;
  padding: 30px 30px 26px;
  box-shadow: 0 2px 10px hsl(var(--shadow) / 0.08);
  margin-bottom: 20px;
}

.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 28px;
  width: 46px;
  height: 8px;
  background: var(--accent-warm);
  border-radius: 0 0 3px 3px;
}

.card-type {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 6px 0 10px;
}

.card h3 {
  font-family: 'Source Serif 4', Georgia, serif;
  font-size: 22px;
  font-weight: 600;
  line-height: 1.35;
  text-wrap: balance;
  margin: 0 0 14px;
  color: var(--ink);
}

.card .gist {
  font-family: 'Source Serif 4', Georgia, serif;
  font-size: 15.5px;
  font-style: italic;
  line-height: 1.6;
  color: var(--ink-soft);
  padding-left: 14px;
  border-left: 2px solid var(--rule);
  margin: 0 0 22px;
}

.card .points {
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 13px;
}

.card .points li {
  display: flex;
  gap: 12px;
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--ink);
}

.card .points li::before {
  content: "—";
  color: var(--accent-warm);
  flex-shrink: 0;
  font-family: 'IBM Plex Mono', monospace;
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  border-top: 1px solid var(--rule-soft);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
}

.card-footer a {
  color: var(--accent);
  text-decoration: none;
}

.card-footer a:hover { text-decoration: underline; }
.card-footer .stamp { color: var(--ink-faint); }

.actions {
  display: flex;
  gap: 8px;
  margin-top: 16px;
  justify-content: flex-end;
}

.actions button {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11.5px;
  letter-spacing: 0.04em;
  background: transparent;
  color: var(--ink-soft);
  border: 1px solid var(--rule);
  border-radius: 2px;
  padding: 7px 13px;
  cursor: pointer;
}

.actions button:hover { border-color: var(--accent); color: var(--accent); }

/* ---- 歷史紀錄清單 ---- */
.history-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--rule-soft);
}

.history-row {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 4px;
  border-bottom: 1px solid var(--rule-soft);
  cursor: pointer;
}

.history-row:hover { background: var(--paper-raised); }

.history-row .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
  background: var(--dot-color, var(--ink-faint));
}

.history-row .title {
  flex: 1;
  min-width: 0;
  font-size: 14px;
  color: var(--ink);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.history-row .cat {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  color: var(--ink-faint);
  flex-shrink: 0;
}

.history-row .date {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  color: var(--ink-faint);
  flex-shrink: 0;
  width: 44px;
  text-align: right;
}

.note {
  margin-top: 20px;
  font-size: 12.5px;
  color: var(--ink-faint);
  line-height: 1.7;
}

.note.error { color: var(--error); }

/* ---- 手機版：側欄收合成上方橫向列 ---- */
@media (max-width: 720px) {
  .app { flex-direction: column; }

  .sidebar {
    width: 100%;
    padding: 24px 16px 0;
  }

  .sidebar h1 { margin-bottom: 14px; }
  .drawer-label { display: none; }

  .drawers {
    flex-direction: row;
    overflow-x: auto;
    gap: 8px;
    padding-bottom: 14px;
  }

  .drawer {
    flex-shrink: 0;
    border-radius: 20px;
    padding: 7px 14px;
    background: var(--paper-raised);
    border: 1px solid var(--rule);
  }

  .drawer.active { box-shadow: none; border-color: var(--accent); }

  .main {
    border-left: none;
    border-top: 1px solid var(--rule);
    padding: 24px 16px 60px;
  }
}