/* =========================================================
   FolioStory — Design System
   Style: Clean, minimal, modern SaaS. Lots of whitespace.
   Signature: a colored "spine" on each book card that mirrors
   the way a status ribbon peeks out from a shelved book.
   ========================================================= */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,500..700&family=Inter:wght@400;500;600;700&display=swap');

:root {
  /* Neutrals */
  --paper: #F0F1F3;
  --surface: #FCFCFD;
  --ink: #14171A;
  --ink-soft: #5B6167;
  --ink-faint: #8A9097;
  --border: #DEE1E5;
  --border-strong: #CACDD2;

  /* Accent — forest green, reads as a bookmark ribbon / shelf spine */
  --accent: #2F6F4E;
  --accent-hover: #275D41;
  --accent-soft: #E7F1EC;

  /* Status colors (also used as spine colors) */
  --status-want: #C88A3B;
  --status-want-soft: #FBF0DF;
  --status-reading: #3B6EA5;
  --status-reading-soft: #E7EFF7;
  --status-finished: #2F6F4E;
  --status-finished-soft: #E7F1EC;

  --danger: #C4453A;
  --danger-soft: #FBEAE8;
  --danger-hover: #A83A31;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;

  --shadow-sm: 0 1px 2px rgba(20, 23, 26, 0.06);
  --shadow-md: 0 6px 20px rgba(20, 23, 26, 0.08);

  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-display: 'Fraunces', Georgia, serif;
}

/* Dark mode palette */
body.dark-mode {
  --paper: #121417;
  --surface: #1B1E22;
  --ink: #EEF0F2;
  --ink-soft: #A7ADB4;
  --ink-faint: #767C83;
  --border: #2A2E33;
  --border-strong: #383D43;

  --accent: #4FA37B;
  --accent-hover: #5CB489;
  --accent-soft: #1B2A22;

  --status-want: #D9A15C;
  --status-want-soft: #2A2317;
  --status-reading: #6FA0D6;
  --status-reading-soft: #18232F;
  --status-finished: #4FA37B;
  --status-finished-soft: #1B2A22;

  --danger: #E06B60;
  --danger-soft: #2C1B19;
  --danger-hover: #E88880;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.45);
}

/* ============ Reset & Base ============ */
* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.6;
  font-size: 15px;
  transition: background-color 0.25s ease, color 0.25s ease;
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.01em;
}

h2 { font-size: 1.6rem; margin-bottom: 1.25rem; }
h2 i { margin-right: 8px; font-size: 0.85em; color: var(--accent); }
h3 { font-size: 1.05rem; }

a { color: inherit; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

/* ============ Layout shell ============ */
main {
  max-width: 1120px;
  margin: 0 auto;
  padding: 96px 32px 64px;
}

/* When a <header> precedes <main> (dashboard only), the header itself
   already clears the fixed nav — main doesn't need to add that same
   clearance again, or the gap between them looks oversized. */
header + main {
  padding-top: 24px;
}

main h2 { padding-top: 0; margin-top: 0; }

.section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  margin-bottom: 28px;
  box-shadow: var(--shadow-sm);
}

header {
  padding: 7rem 2rem 1rem;
  text-align: center;
}

header h1 { font-size: 2rem; margin-bottom: 0.4rem; }
header p { color: var(--ink-soft); }

/* ============ Nav ============ */
#nav-menu {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 32px;
  background: rgba(240, 241, 243, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

body.dark-mode #nav-menu {
  background: rgba(18, 20, 23, 0.85);
}

#nav-menu .logo {
  font-family: var(--font-body);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  text-decoration: none;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-badge {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.logo-badge svg {
  width: 16px;
  height: 16px;
}

.logo-word { line-height: 1; }
.logo-word-folio { color: var(--ink); }
.logo-word-accent { color: var(--accent); }

#nav-menu .menu {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 4px;
}

#nav-menu .menu a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  text-decoration: none;
  color: var(--ink-soft);
  font-weight: 500;
  font-size: 0.9rem;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  transition: background 0.15s ease, color 0.15s ease;
}

#nav-menu .menu a:hover { background: var(--accent-soft); color: var(--accent); }
#nav-menu .menu a.active { color: var(--accent); background: var(--accent-soft); }

#nav-menu .menu button {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: none;
  border: none;
  color: var(--ink-soft);
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.9rem;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}

#nav-menu .menu button:hover { background: var(--border); color: var(--ink); }

/* ============ Buttons ============ */
.btn-primary, .btn-secondary, .btn-danger,
form#bookForm button, form#friendForm button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.9rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, transform 0.1s ease;
}

.btn-primary, form#bookForm button, form#friendForm button {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover, form#bookForm button:hover, form#friendForm button:hover {
  background: var(--accent-hover);
}

.btn-secondary {
  background: var(--surface);
  color: var(--ink);
  border-color: var(--border-strong);
}
.btn-secondary:hover { background: var(--paper); border-color: var(--ink-faint); }

.btn-danger {
  background: var(--danger-soft);
  color: var(--danger);
}
.btn-danger:hover { background: var(--danger); color: #fff; }

.btn-primary:active, .btn-secondary:active, .btn-danger:active,
form#bookForm button:active { transform: scale(0.97); }

/* ============ Forms ============ */
form {
  max-width: 640px;
  margin: 0 auto;
}

form label {
  display: block;
  margin: 16px 0 6px;
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--ink-soft);
}

form label:first-of-type { margin-top: 0; }

#bookForm input, #bookForm select, #bookForm textarea,
#friendForm input, #loginForm input,
#progress-section input, #progress-section select {
  width: 100%;
  padding: 11px 14px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--ink);
  font-size: 0.95rem;
  font-family: var(--font-body);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

#bookForm input:focus, #bookForm select:focus, #bookForm textarea:focus,
#friendForm input:focus, #loginForm input:focus,
#progress-section input:focus, #progress-section select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
  outline: none;
}

#bookForm textarea { min-height: 90px; resize: vertical; }

.field-hint {
  display: block;
  margin-top: 4px;
  font-size: 0.78rem;
  color: var(--ink-faint);
}

.isbn-status.loading { color: var(--status-reading); }
.isbn-status.success { color: var(--accent); font-weight: 600; }
.isbn-status.error { color: var(--danger); }

/* ISBN action row: Look Up + Scan Barcode, side by side. Overrides the
   generic #bookForm button width/margin rule further down this file, which
   is meant for the main submit button only. */
.isbn-button-row {
  display: flex;
  gap: 10px;
  margin-top: 10px;
}
#bookForm .isbn-button-row button {
  flex: 1;
  width: auto;
  margin-top: 0;
  padding: 10px 14px;
}
#bookForm .isbn-button-row button:disabled { opacity: 0.6; cursor: wait; }

/* Barcode scanner overlay */
.scanner-overlay {
  position: fixed;
  inset: 0;
  background: rgba(10, 12, 14, 0.85);
  z-index: 4000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.scanner-modal {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 20px;
  max-width: 420px;
  width: 100%;
  box-shadow: 0 12px 40px rgba(0,0,0,0.4);
}

.scanner-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}
.scanner-header h3 { font-size: 1.05rem; margin: 0; }

.scanner-close {
  width: 32px;
  height: 32px;
  border: none;
  background: var(--paper);
  color: var(--ink-soft);
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all 0.15s ease;
}
.scanner-close:hover { background: var(--border); color: var(--ink); }

#scannerReader {
  width: 100%;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: #000;
  min-height: 220px;
}

#bookForm button, #friendForm button { width: 100%; margin-top: 24px; padding: 12px; }

.form-section-heading {
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  font-size: 1rem;
}

.field-row {
  display: flex;
  gap: 16px;
  margin-top: 16px;
}
.field-row > div { flex: 1; min-width: 0; }
.field-row label { margin-top: 0 !important; }

.checkbox-label {
  display: flex !important;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--ink);
  cursor: pointer;
}
.checkbox-label input[type="checkbox"] {
  width: auto;
  margin: 0;
  accent-color: var(--accent);
  cursor: pointer;
}

/* ============ Library controls ============ */
.library-controls {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.library-controls label {
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--ink-soft);
}

.sort-select, #searchBooks {
  padding: 9px 14px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 0.9rem;
  cursor: pointer;
}

.sort-select { appearance: none; padding-right: 34px;
  background-image: url("data:image/svg+xml;utf8,<svg fill='%235B6167' height='16' viewBox='0 0 24 24' width='16' xmlns='http://www.w3.org/2000/svg'><path d='M7 10l5 5 5-5z'/></svg>");
  background-repeat: no-repeat;
  background-position: right 10px center;
}

.sort-select option { color: var(--ink); background: var(--surface); }

#searchBooks { flex: 1; min-width: 180px; }

/* ============ Book library grid ============ */
#bookList { margin-top: 8px; }

.shelf-row { margin-bottom: 32px; }

.shelf-row h3 {
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
  color: var(--ink-soft);
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-family: var(--font-body);
  font-weight: 700;
}

.shelf {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 20px;
}

.shelf li { list-style: none; }

.book-card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 18px 18px 18px 22px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  text-align: left;
  height: 100%;
  box-shadow: var(--shadow-sm);
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
  overflow: hidden;
}

/* Signature element: shelf "spine" strip colored by reading status */
.book-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; bottom: 0;
  width: 4px;
  background: var(--status-color, var(--ink-faint));
}

.book-card.status-want { --status-color: var(--status-want); }
.book-card.status-reading { --status-color: var(--status-reading); }
.book-card.status-finished { --status-color: var(--status-finished); }

.book-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-strong);
}

.book-cover-wrapper { display: flex; justify-content: center; width: 100%; margin-bottom: 14px; }

.book-cover {
  display: block;
  width: 110px;
  height: 164px;
  object-fit: cover;
  border-radius: 4px;
  box-shadow: 0 2px 8px rgba(20,23,26,0.18);
  cursor: zoom-in;
  background: var(--paper);
}

.book-header {
  width: 100%;
  min-height: 4.4em;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.book-header strong {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.95rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.35em;
}

.book-title-link {
  cursor: pointer;
  transition: color 0.15s ease;
}

.book-title-link:hover { color: var(--accent); }

.book-title-icon {
  font-size: 0.7rem;
  color: var(--ink-faint);
  margin-left: 2px;
  vertical-align: super;
  transition: color 0.15s ease;
}

.book-title-link:hover .book-title-icon { color: var(--accent); }

.book-header em {
  font-style: normal;
  color: var(--ink-soft);
  font-size: 0.85rem;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.book-meta {
  font-size: 0.8rem;
  color: var(--ink-soft);
  margin: 4px 0;
  display: flex;
  align-items: center;
  gap: 6px;
}

.book-meta i { color: var(--ink-faint); font-size: 0.85rem; width: 14px; text-align: center; }

.book-meta.status-want { color: var(--status-want); }
.book-meta.status-reading { color: var(--status-reading); }
.book-meta.status-finished { color: var(--status-finished); }
.book-meta.status-want i,
.book-meta.status-reading i,
.book-meta.status-finished i { color: currentColor; }

.book-card .notes {
  width: 100%;
  font-size: 0.82rem;
  color: var(--ink-soft);
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
  cursor: pointer;
  max-height: 1.6em;
  opacity: 0.9;
  transition: max-height 0.4s ease, opacity 0.4s ease;
}

.book-card .notes.expanded {
  -webkit-line-clamp: unset;
  overflow-y: auto;
  white-space: normal;
  max-height: 200px;
  opacity: 1;
}

/* Book actions */
.book-actions {
  margin-top: auto;
  padding-top: 14px;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.book-actions .action-row { display: flex; gap: 8px; width: 100%; }

.book-actions button {
  flex: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 10px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--ink-soft);
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
}

.book-actions .edit-btn:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }
.book-actions .delete-btn:hover { border-color: var(--danger); color: var(--danger); background: var(--danger-soft); }

.recommend-checkbox { display: none; }

.recommend-label {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--ink-soft);
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
}

.recommend-label::after { content: "Recommend"; }
.recommend-checkbox:checked + .recommend-label::after { content: "Recommended"; }
.recommend-checkbox:checked + .recommend-label {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent);
}
.recommend-label:hover { border-color: var(--accent); color: var(--accent); }

/* Book progress mini bar on card */
.book-progress { width: 100%; margin: 10px 0 4px; }
.book-progress p { font-size: 0.75rem; color: var(--ink-faint); margin-top: 4px; }

/* ============ Cover overlay/zoom ============ */
.cover-overlay {
  position: fixed; inset: 0;
  background: rgba(10, 12, 14, 0.85);
  display: flex; align-items: center; justify-content: center;
  z-index: 2000;
  cursor: zoom-out;
}

.cover-expanded {
  width: min(460px, 80vw);
  height: auto;
  max-height: 85vh;
  border-radius: 8px;
  box-shadow: 0 12px 40px rgba(0,0,0,0.5);
}

/* ============ Dashboard stat cards ============ */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 16px;
  margin: 20px 0;
}

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px;
  text-align: left;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}

.stat-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); border-color: var(--border-strong); }

.stat-card i { color: var(--accent); font-size: 1.1rem; margin-bottom: 10px; display: block; }
.stat-card h3 { font-family: var(--font-body); font-size: 0.78rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; color: var(--ink-soft); margin-bottom: 6px; }
.stat-card .accent { font-family: var(--font-display); font-size: 2.1rem; font-weight: 600; color: var(--ink); }

.stat-card.blue i { color: var(--status-reading); }
.stat-card.green i { color: var(--status-finished); }
.stat-card.purple i { color: #7C5CBF; }
.stat-card.orange i { color: var(--status-want); }
.stat-card.red i { color: var(--danger); }
.stat-card.teal i { color: #2A9D8F; }
.stat-card.pink i { color: #C2477B; }

/* Value stat cards are informational only — no page to click through to,
   so they shouldn't look interactive the way the others do. */
.stat-card-static { cursor: default; }
.stat-card-static:hover { transform: none; box-shadow: var(--shadow-sm); border-color: var(--border); }

.stat-trend {
  display: block;
  font-size: 0.72rem;
  font-weight: 600;
  margin-top: 4px;
}
.stat-trend .trend-up { color: var(--accent); }
.stat-trend .trend-down { color: var(--danger); }
.stat-trend .trend-flat { color: var(--ink-faint); }

/* Timeframe toggle (Dashboard) */
.timeframe-toggle {
  display: inline-flex;
  gap: 2px;
  padding: 3px;
  background: var(--paper);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 20px;
}

.timeframe-btn {
  padding: 7px 16px;
  border: none;
  background: transparent;
  color: var(--ink-soft);
  font-family: var(--font-body);
  font-size: 0.82rem;
  font-weight: 600;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.15s ease;
}
.timeframe-btn:hover { color: var(--ink); }
.timeframe-btn.active { background: var(--surface); color: var(--accent); box-shadow: var(--shadow-sm); }

/* ============ Progress bars ============ */
.progress-container {
  width: 100%;
  background: var(--border);
  border-radius: 8px;
  margin: 15px 0;
  height: 20px;
  overflow: hidden;
}

.progress-bar { height: 100%; width: 0%; background: var(--accent); transition: width 0.4s ease; }
.progress-bar.progress-grey { background: var(--ink-faint); }
.progress-blue { background: var(--status-reading); }
.progress-green { background: var(--status-finished); }
.progress-red { background: var(--danger); }
.progress-grey { background: var(--ink-faint); }

.progress-summary-bar { height: 8px; background: var(--border); border-radius: 4px; overflow: hidden; margin: 6px 0; width: 100%; }
.progress-summary-fill { height: 100%; width: 0%; transition: width 0.3s ease; }
.progress-summary-blue { background: var(--status-reading) !important; }
.progress-summary-green { background: var(--status-finished) !important; }
.progress-summary-red { background: var(--danger) !important; }
.progress-summary-grey { background: var(--ink-faint) !important; }

#progressText, #goalSummary, #activeReadsCounter { color: var(--ink-soft); font-size: 0.9rem; margin: 8px 0; }

/* ============ Friends ============ */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
  margin-top: 16px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.card h3 { margin-bottom: 6px; }
.card p { color: var(--ink-soft); font-size: 0.85rem; margin-bottom: 14px; }
.card .card-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.card .card-actions button { flex: 1; min-width: 100px; }

.shared-books { margin-top: 14px; padding-top: 14px; border-top: 1px solid var(--border); }

.shared-group-heading {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ink-faint);
  margin: 14px 0 8px;
}
.shared-group-heading:first-child { margin-top: 0; }
.shared-group-heading i { font-size: 0.8rem; }

.shared-books ul, #inboxRecommendationsList ul, #inboxWishlistList ul { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.shared-books li, #inboxRecommendationsList li, #inboxWishlistList li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.82rem;
  color: var(--ink-soft);
  padding: 8px 10px;
  background: var(--paper);
  border-radius: var(--radius-sm);
  transition: background 0.15s ease;
}
.shared-books li:hover, #inboxRecommendationsList li:hover, #inboxWishlistList li:hover { background: var(--accent-soft); }

.shared-book-cover {
  width: 34px;
  height: 50px;
  object-fit: cover;
  border-radius: 3px;
  box-shadow: 0 1px 4px rgba(20,23,26,0.2);
  flex-shrink: 0;
  background: var(--surface);
  cursor: pointer;
}

.shared-book-info { display: flex; flex-direction: column; gap: 1px; min-width: 0; flex: 1; cursor: pointer; }
.shared-book-info strong {
  color: var(--ink);
  font-size: 0.85rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.shared-book-info span { font-size: 0.76rem; color: var(--ink-faint); }
.shared-book-info .shared-book-status { color: var(--accent); font-weight: 600; }

.shared-book-remove {
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: transparent;
  color: var(--ink-faint);
  border-radius: 50%;
  cursor: pointer;
  transition: all 0.15s ease;
}
.shared-book-remove:hover { background: var(--danger-soft); color: var(--danger); }

.inbox-actions {
  display: flex;
  gap: 6px;
  flex-shrink: 0;
  flex-wrap: wrap;
  justify-content: flex-end;
  align-items: center;
}

.inbox-add-btn {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 8px 10px;
  border: 1px solid var(--accent);
  border-radius: var(--radius-sm);
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.15s ease;
}
.inbox-add-btn:hover { background: var(--accent); color: #fff; }

/* Friend account-link badge */
.friend-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 20px;
  margin: 6px 0 10px;
}
.friend-badge-linked {
  background: var(--accent-soft);
  color: var(--accent);
}
.friend-badge-unlinked {
  background: var(--border);
  color: var(--ink-faint);
}

/* "Already purchased" signal — shared across the wishlist owner and everyone
   else who received the same item, without naming who bought it. */
.purchased-badge {
  position: absolute;
  top: 10px;
  right: 10px;
  z-index: 5;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.68rem;
  font-weight: 700;
  padding: 4px 9px;
  border-radius: 20px;
  background: var(--accent);
  color: #fff;
  box-shadow: var(--shadow-sm);
}

.purchased-badge-inline {
  position: static;
  background: var(--accent-soft);
  color: var(--accent);
  flex-shrink: 0;
}

.inbox-purchased-btn {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 8px 10px;
  border: 1px solid var(--accent);
  border-radius: var(--radius-sm);
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.15s ease;
}
.inbox-purchased-btn:hover { background: var(--accent); color: #fff; }

.inbox-actions .buy-menu { margin-top: 0; }
.inbox-actions .buy-menu summary { padding: 8px 10px; }

.detail-card {
  position: relative;
  display: flex;
  gap: 24px;
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 28px;
  max-width: 480px;
  width: 90vw;
  box-shadow: 0 12px 40px rgba(0,0,0,0.35);
  cursor: default;
}

.detail-close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 30px;
  height: 30px;
  border: none;
  background: var(--paper);
  color: var(--ink-soft);
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s ease;
}
.detail-close:hover { background: var(--border); color: var(--ink); }

.detail-cover {
  width: 120px;
  height: 178px;
  object-fit: cover;
  border-radius: 6px;
  box-shadow: 0 4px 14px rgba(20,23,26,0.25);
  flex-shrink: 0;
  background: var(--paper);
}

.detail-body { min-width: 0; }
.detail-eyebrow {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ink-faint);
  font-weight: 600;
  margin-bottom: 6px;
}
.detail-body h3 { font-size: 1.2rem; margin-bottom: 2px; }
.detail-author { color: var(--ink-soft); font-size: 0.9rem; margin-bottom: 10px; }
.detail-body .book-meta { margin: 5px 0; }
.detail-body .fa-star { color: #E0A93E; margin-right: 2px; }
.detail-notes {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--ink-soft);
  font-style: italic;
}

@media (max-width: 520px) {
  .detail-card { flex-direction: column; align-items: center; text-align: center; }
}

#friendForm { display: flex; gap: 10px; max-width: 480px; align-items: flex-start; }
#friendForm input { flex: 1; }
#friendForm button { width: auto; margin-top: 0; padding: 11px 20px; }

/* ============ Login ============ */
.login-section { max-width: 420px; margin: 40px auto; text-align: center; }
.login-section h2 { text-align: center; }
#loginForm { display: flex; flex-direction: column; }
#loginForm button, #loginForm .btn-secondary { margin-top: 10px; }
#loginForm label { text-align: left; }

.auth-mode-toggle {
  display: inline-flex;
  gap: 2px;
  padding: 3px;
  background: var(--paper);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 24px;
}

.auth-mode-btn {
  padding: 8px 20px;
  border: none;
  background: transparent;
  color: var(--ink-soft);
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.15s ease;
}
.auth-mode-btn:hover { color: var(--ink); }
.auth-mode-btn.active { background: var(--surface); color: var(--accent); box-shadow: var(--shadow-sm); }

.tile.logout-tile {
  background: var(--accent-soft);
  border: 1px solid var(--accent);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  margin-top: 20px;
  text-align: left;
}
.tile.logout-tile h3 { color: var(--accent); margin-bottom: 4px; font-size: 1rem; }
.tile.logout-tile p { color: var(--ink-soft); font-size: 0.85rem; }

#loginMessage { margin-top: 14px; font-size: 0.9rem; font-weight: 600; }

/* ============ Intro / index ============ */
.intro { padding: 3rem 1rem 1rem; text-align: center; }
.intro h2 { font-size: 2.4rem; margin-bottom: 12px; }
.intro p { color: var(--ink-soft); max-width: 480px; margin: 0 auto 24px; }

/* ============ Footer ============ */
footer {
  text-align: center;
  padding: 24px;
  color: var(--ink-faint);
  font-size: 0.8rem;
}

/* ============ Empty states ============ */
.empty-state {
  text-align: center;
  padding: 48px 20px;
  color: var(--ink-faint);
}
.empty-state i { font-size: 1.8rem; margin-bottom: 10px; display: block; color: var(--border-strong); }

/* ============ Discover ============ */
.discover-hero {
  display: flex;
  gap: 28px;
  align-items: flex-start;
}

.discover-hero-cover {
  width: 150px;
  height: 220px;
  object-fit: cover;
  border-radius: 8px;
  box-shadow: 0 4px 16px rgba(20,23,26,0.2);
  flex-shrink: 0;
  background: var(--paper);
}

.discover-hero-body { min-width: 0; }
.discover-hero-body h3 { font-size: 1.4rem; margin-bottom: 2px; }

.discover-reason {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 10px;
}
.discover-reason i { margin-right: 5px; }

.discover-author { color: var(--ink-soft); font-size: 0.95rem; margin-bottom: 12px; }

.discover-meta-row { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 14px; }
.discover-tag {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 20px;
  background: var(--paper);
  border: 1px solid var(--border);
  color: var(--ink-soft);
}

.discover-description {
  font-size: 0.88rem;
  color: var(--ink-soft);
  line-height: 1.6;
  margin-bottom: 18px;
  max-width: 60ch;
}

.discover-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.discover-actions .buy-menu { margin-top: 0; }

@media (max-width: 640px) {
  .discover-hero { flex-direction: column; align-items: center; text-align: center; }
  .discover-meta-row, .discover-actions { justify-content: center; }
}

/* Dashboard "Book of the Day" teaser strip */
.discover-teaser {
  display: flex;
  align-items: center;
  gap: 16px;
}
.discover-teaser-cover {
  width: 52px;
  height: 78px;
  object-fit: cover;
  border-radius: 4px;
  box-shadow: 0 2px 8px rgba(20,23,26,0.2);
  flex-shrink: 0;
  background: var(--paper);
}
.discover-teaser-body { flex: 1; min-width: 0; }
.discover-teaser-body h3 { font-size: 1.05rem; }
.discover-teaser .discover-reason { margin-bottom: 4px; }
.discover-teaser .discover-author { margin-bottom: 0; font-size: 0.85rem; }

@media (max-width: 640px) {
  .discover-teaser { flex-wrap: wrap; }
}

/* Dashboard "Recommender Level" gamification bar */
.recommender-level {
  display: flex;
  align-items: center;
  gap: 18px;
}

.recommender-badge {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--accent), #E0A93E);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: var(--shadow-sm);
}
.recommender-badge i { color: #fff; font-size: 1.3rem; }

.recommender-body { flex: 1; min-width: 0; }

.recommender-header-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 8px;
}
.recommender-header-row h3 { font-size: 1.1rem; margin: 0; }

.recommender-bar-track {
  width: 100%;
  height: 12px;
  background: var(--border);
  border-radius: 20px;
  overflow: hidden;
}
.recommender-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), #E0A93E);
  border-radius: 20px;
  transition: width 0.5s ease;
}

@media (max-width: 640px) {
  .recommender-level { flex-wrap: wrap; }
}

/* Reading Challenges (Progress page) */
.challenges-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
  margin-bottom: 20px;
}

.challenge-card {
  background: var(--paper);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 18px;
}

.challenge-card-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 4px;
}
.challenge-card-header i { color: var(--accent); font-size: 1rem; }
.challenge-card-header h3 { font-size: 0.95rem; margin: 0; }

.challenge-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  font-size: 0.78rem;
  color: var(--ink-soft);
  flex-wrap: wrap;
}
.challenge-card-footer .trend-up { color: var(--accent); font-weight: 600; }
.challenge-card-footer .trend-down { color: var(--danger); font-weight: 600; }
.challenge-card-footer .trend-flat { color: var(--ink-faint); font-weight: 600; }

.challenge-settings {
  border-top: 1px solid var(--border);
  padding-top: 16px;
}
.challenge-settings summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--ink-soft);
  display: flex;
  align-items: center;
  gap: 8px;
}
.challenge-settings summary:hover { color: var(--accent); }
.challenge-settings-form {
  max-width: 420px;
  margin-top: 16px;
}
.challenge-settings-form input {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--ink);
  font-family: var(--font-body);
  margin-bottom: 12px;
}

/* Achievements */
.achievements-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 14px;
}

.achievement-badge {
  text-align: center;
  padding: 20px 12px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  transition: transform 0.15s ease;
}

.achievement-badge.unlocked {
  background: var(--accent-soft);
  border-color: var(--accent);
}
.achievement-badge.unlocked:hover { transform: translateY(-2px); }

.achievement-badge.locked {
  background: var(--paper);
  opacity: 0.55;
}

.achievement-badge-icon {
  width: 46px;
  height: 46px;
  margin: 0 auto 10px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}
.achievement-badge.unlocked .achievement-badge-icon {
  background: linear-gradient(135deg, var(--accent), #E0A93E);
  color: #fff;
}
.achievement-badge.locked .achievement-badge-icon {
  background: var(--border);
  color: var(--ink-faint);
}

.achievement-badge h4 {
  font-size: 0.82rem;
  font-weight: 700;
  margin-bottom: 4px;
  color: var(--ink);
}
.achievement-badge.locked h4 { color: var(--ink-faint); }

.achievement-badge p {
  font-size: 0.72rem;
  color: var(--ink-soft);
  line-height: 1.4;
}

/* Achievement unlock toast */
.achievement-toast {
  position: fixed;
  top: 80px;
  right: 24px;
  z-index: 3000;
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--surface);
  border: 1px solid var(--accent);
  border-radius: var(--radius-lg);
  padding: 16px 20px;
  box-shadow: 0 12px 32px rgba(0,0,0,0.25);
  transform: translateX(120%);
  opacity: 0;
  transition: transform 0.35s ease, opacity 0.35s ease;
  max-width: 320px;
}
.achievement-toast.show { transform: translateX(0); opacity: 1; }

.achievement-toast-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #E0A93E);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  flex-shrink: 0;
}

.achievement-toast-label {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--accent);
  margin-bottom: 2px;
}
.achievement-toast-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--ink);
}

@media (max-width: 640px) {
  .achievement-toast { left: 16px; right: 16px; max-width: none; }
}

/* ============ Wishlist ============ */
.wishlist-bulk-bar {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

.wishlist-bulk-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-left: auto;
}

.wishlist-bulk-actions .sort-select { min-width: 160px; }

.wishlist-select-wrap {
  position: absolute;
  top: 10px;
  left: 10px;
  z-index: 5;
}

.wishlist-select {
  position: absolute;
  opacity: 0;
  width: 26px;
  height: 26px;
  margin: 0;
  cursor: pointer;
}

.wishlist-select-label {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 6px;
  background: var(--surface);
  border: 2px solid var(--border-strong);
  box-shadow: var(--shadow-sm);
  color: transparent;
  cursor: pointer;
  transition: all 0.15s ease;
}

.wishlist-select-label i { font-size: 0.7rem; }

.wishlist-select:checked + .wishlist-select-label {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.wishlist-select:focus-visible + .wishlist-select-label {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* "Buy" dropdown — native <details>/<summary>, no extra JS needed */
.buy-menu {
  position: relative;
  margin-top: 8px;
}

.buy-menu summary {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 10px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--ink-soft);
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
}

.buy-menu summary::-webkit-details-marker { display: none; }
.buy-menu summary:hover { border-color: var(--accent); color: var(--accent); }
.buy-menu[open] summary { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }

.buy-menu-list {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  right: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
  z-index: 20;
  overflow: hidden;
}

.buy-menu-list a {
  display: block;
  padding: 10px 12px;
  font-size: 0.78rem;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--border);
}

.buy-menu-list a:last-child { border-bottom: none; }
.buy-menu-list a:hover { background: var(--accent-soft); color: var(--accent); }

@media (max-width: 720px) {
  .wishlist-bulk-actions { margin-left: 0; width: 100%; }
  .wishlist-bulk-actions .sort-select { flex: 1; }
}

/* ============ Responsive ============ */
@media (max-width: 720px) {
  main { padding: 96px 16px 48px; }
  #nav-menu { padding: 12px 16px; flex-wrap: wrap; gap: 8px; }
  #nav-menu .menu { gap: 2px; flex-wrap: wrap; }
  #nav-menu .menu a, #nav-menu .menu button { padding: 6px 8px; font-size: 0.82rem; }
  .section { padding: 20px; }
  .shelf { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 12px; }
}