/* Bookshelf – a single, dependency-free stylesheet.
   Design tokens live in :root; dark mode only overrides tokens. */

:root {
  --bg: #f6f5f1;
  --surface: #ffffff;
  --surface-2: #efede7;
  --border: #e4e1d9;
  --text: #1c1b19;
  --muted: #6d6a63;
  --accent: #2f6b58;
  --accent-hover: #245545;
  --accent-soft: #e1eee8;
  --on-accent: #ffffff;
  --danger: #b3392f;
  --danger-soft: #f8e5e3;
  --cover-shadow: 0 1px 2px rgb(0 0 0 / 0.08), 0 8px 18px -8px rgb(0 0 0 / 0.3);
  --pop-shadow: 0 24px 60px -16px rgb(0 0 0 / 0.35);
  --radius: 14px;
  --radius-sm: 9px;
  --font-sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --font-mono: ui-monospace, "SF Mono", "Cascadia Mono", Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #151513;
    --surface: #1e1d1b;
    --surface-2: #282724;
    --border: #34322e;
    --text: #ecebe6;
    --muted: #9e9a91;
    --accent: #7ac4a7;
    --accent-hover: #96d4bc;
    --accent-soft: #1f3a30;
    --on-accent: #0e1f18;
    --danger: #f08b80;
    --danger-soft: #3b201d;
    --cover-shadow: 0 1px 2px rgb(0 0 0 / 0.4), 0 8px 20px -8px rgb(0 0 0 / 0.7);
  }
}

/* ---------- Base ---------- */

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 var(--font-sans);
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
h1, h2, h3, p { margin: 0; }
h1, h2, h3 { line-height: 1.2; }
strong { font-weight: 650; }
[hidden] { display: none !important; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.icon { display: inline-block; flex: none; vertical-align: -0.2em; }

.muted { color: var(--muted); }
.small { font-size: 13px; }
.mono { font-family: var(--font-mono); font-size: 13px; }
.no-margin { margin: 0 !important; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

.container { max-width: 1200px; margin: 0 auto; padding: 28px 20px 96px; }

/* ---------- Top bar ---------- */

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(1.4) blur(14px);
  -webkit-backdrop-filter: saturate(1.4) blur(14px);
  border-bottom: 1px solid var(--border);
}
.topbar-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 10px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-right: auto;
  font-family: var(--font-serif);
  font-size: 21px;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.brand .icon { color: var(--accent); }
.nav { display: flex; align-items: center; gap: 2px; }
.nav a {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 8px 11px;
  border-radius: var(--radius-sm);
  color: var(--muted);
  font-weight: 550;
  transition: color 0.15s, background 0.15s;
}
.nav a:hover { color: var(--text); background: var(--surface-2); }
.nav a.active { color: var(--text); background: var(--surface-2); }

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 40px;
  padding: 0 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  font-weight: 600;
  white-space: nowrap;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s, transform 0.1s;
}
.btn:hover { background: var(--surface-2); }
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.btn-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
.btn-danger { color: var(--danger); }
.btn-danger:hover { background: var(--danger-soft); border-color: transparent; }
.btn-toggle.is-on { border-color: var(--accent); background: var(--accent-soft); color: var(--accent); }
.btn-sm { height: 32px; padding: 0 11px; font-size: 13.5px; gap: 6px; }
.btn-block { width: 100%; }
.btn.is-copied { color: var(--accent); border-color: var(--accent); }
.icon-btn {
  display: inline-grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: 0;
  border-radius: var(--radius-sm);
  background: none;
  color: var(--muted);
  cursor: pointer;
}
.icon-btn:hover { background: var(--surface-2); color: var(--text); }

/* ---------- Forms ---------- */

.form { display: grid; gap: 16px; }
.form-narrow { max-width: 420px; }
.form-row { display: grid; grid-template-columns: 1fr 140px; gap: 12px; }
.field { display: grid; gap: 6px; }
.field > label { font-size: 13px; font-weight: 600; color: var(--muted); }
.input {
  width: 100%;
  height: 42px;
  padding: 0 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  transition: border-color 0.15s, box-shadow 0.15s;
}
textarea.input { height: auto; min-height: 120px; padding: 10px 12px; line-height: 1.5; resize: vertical; }
.input-file { height: auto; padding: 8px; }
.input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.checkbox { display: flex; align-items: center; gap: 8px; font-weight: 500; cursor: pointer; }
.checkbox input { width: 17px; height: 17px; accent-color: var(--accent); }
.alert { padding: 10px 14px; border-radius: var(--radius-sm); font-size: 14px; font-weight: 500; margin-bottom: 16px; }
.alert-error { background: var(--danger-soft); color: var(--danger); }
.alert-ok { background: var(--accent-soft); color: var(--accent); }
.stack > .alert { margin-bottom: 0; }

/* ---------- Cards & pages ---------- */

.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; }
.card h2 { display: flex; align-items: center; gap: 8px; font-size: 17px; font-weight: 650; }
.card h2 .icon { color: var(--accent); }
.card-sub { color: var(--muted); font-size: 14px; margin: 4px 0 20px; }
.card > .field + .field { margin-top: 14px; }
.card-row { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.page-head { margin-bottom: 24px; }
.page-title { font-family: var(--font-serif); font-size: 32px; font-weight: 600; letter-spacing: -0.01em; margin-bottom: 4px; }
.stack { display: grid; gap: 20px; max-width: 780px; }
.stack > * { min-width: 0; }
.steps { margin: 16px 0 0; padding-left: 20px; display: grid; gap: 6px; color: var(--muted); font-size: 14px; }
.steps strong { color: var(--text); font-weight: 600; }
.field-label { font-size: 13px; font-weight: 600; color: var(--muted); }
.copy-field { display: flex; align-items: stretch; gap: 8px; }
.copy-value {
  flex: 1;
  min-width: 0;
  display: flex;
  align-items: center;
  min-height: 42px;
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface-2);
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.4;
  overflow-wrap: anywhere;
  user-select: all;
}
.btn-copy { flex: none; height: auto; min-height: 42px; }

.howto { margin-top: 14px; }
.howto summary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--accent);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
}
.howto summary::-webkit-details-marker { display: none; }
.howto summary::before { content: "▸"; font-size: 12px; transition: transform 0.15s; }
.howto[open] summary::before { transform: rotate(90deg); }
.howto .steps { margin-top: 10px; }

/* ---------- Auth & error pages ---------- */

.auth-wrap { min-height: 100vh; display: grid; place-items: center; padding: 32px 16px; }
.auth-card { width: 100%; max-width: 390px; }
.auth-brand { display: grid; justify-items: center; gap: 6px; margin-bottom: 24px; text-align: center; }
.auth-brand .logo {
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  margin-bottom: 8px;
  border-radius: 15px;
  background: var(--accent);
  color: var(--on-accent);
}
.auth-brand h1 { font-family: var(--font-serif); font-size: 28px; font-weight: 600; }
.error-card { display: grid; justify-items: center; gap: 12px; text-align: center; }
.error-code { font-family: var(--font-serif); font-size: 64px; line-height: 1; color: var(--accent); }
.error-card h1 { font-family: var(--font-serif); font-size: 26px; }

/* ---------- Library toolbar ---------- */

.toolbar { display: flex; gap: 10px; margin-bottom: 16px; }
.search { position: relative; flex: 1; display: flex; align-items: center; }
.search .icon { position: absolute; left: 14px; color: var(--muted); pointer-events: none; }
.search input {
  width: 100%;
  height: 46px;
  padding: 0 16px 0 42px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  transition: border-color 0.15s, box-shadow 0.15s;
}
.search input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.select {
  height: 46px;
  padding: 0 38px 0 16px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='none' stroke='%238a877f' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m2 4 4 4 4-4'/%3E%3C/svg%3E") no-repeat right 16px center;
  appearance: none;
  font-weight: 550;
  cursor: pointer;
}

.pills { display: flex; gap: 6px; margin-bottom: 28px; overflow-x: auto; scrollbar-width: none; }
.pills::-webkit-scrollbar { display: none; }
.pill-group { display: contents; }
.pill { position: relative; flex: none; }
.pill input { position: absolute; opacity: 0; pointer-events: none; }
.pill span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  height: 34px;
  padding: 0 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.pill span:hover { color: var(--text); }
.pill small { font-size: 12px; font-weight: 600; opacity: 0.65; }
.pill input:checked + span { background: var(--text); border-color: var(--text); color: var(--bg); }
.pill input:focus-visible + span { outline: 2px solid var(--accent); outline-offset: 2px; }
.pill-toggle { margin-left: 6px; padding-left: 12px; border-left: 1px solid var(--border); }
.pill-toggle input:checked + span { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }

.section-title {
  margin-bottom: 14px;
  color: var(--muted);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

/* ---------- Covers ---------- */

.cover-frame { position: relative; container-type: inline-size; }
.cover {
  width: 100%;
  aspect-ratio: 2 / 3;
  object-fit: cover;
  border-radius: 5px;
  background: var(--surface-2);
  box-shadow: var(--cover-shadow);
}
.cover-placeholder {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 8px;
  padding: 14% 11%;
  overflow: hidden;
  background:
    linear-gradient(90deg, rgb(0 0 0 / 0.18) 0, rgb(0 0 0 / 0) 6%),
    linear-gradient(160deg, hsl(var(--hue) 34% 44%), hsl(calc(var(--hue) + 35) 40% 26%));
  color: #fff;
}
.ph-title {
  display: -webkit-box;
  -webkit-line-clamp: 6;
  -webkit-box-orient: vertical;
  overflow: hidden;
  font-family: var(--font-serif);
  font-size: max(8px, 11cqi);
  font-weight: 600;
  line-height: 1.2;
  overflow-wrap: anywhere;
}
.ph-author { font-size: max(7px, 7.5cqi); opacity: 0.85; line-height: 1.25; }
.cover-progress {
  position: absolute;
  left: 8px;
  right: 8px;
  bottom: 8px;
  height: 4px;
  border-radius: 99px;
  background: rgb(0 0 0 / 0.45);
  overflow: hidden;
}
.cover-progress span { display: block; height: 100%; border-radius: inherit; background: #fff; }
.cover-badges { position: absolute; top: 7px; right: 7px; display: flex; gap: 4px; }
.cover-frame:has(.cover-badges) .ph-title { padding-right: 18%; }
.badge-done, .badge-device {
  display: grid;
  place-items: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  box-shadow: 0 2px 6px rgb(0 0 0 / 0.25);
}
.badge-done { background: var(--accent); color: var(--on-accent); }
.badge-device { background: rgb(255 255 255 / 0.92); color: #1c1b19; }

/* ---------- Grid ---------- */

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 32px 22px; }
.load-more { grid-column: 1 / -1; padding: 24px 0; color: var(--muted); font-size: 14px; text-align: center; }
.book-card { display: flex; flex-direction: column; gap: 11px; min-width: 0; }
.book-card .cover-frame { transition: transform 0.2s ease; }
.book-card:hover .cover-frame { transform: translateY(-4px); }
.book-meta { min-width: 0; }
.book-title {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  font-size: 14px;
  font-weight: 650;
  line-height: 1.3;
}
.book-author { margin-top: 2px; overflow: hidden; color: var(--muted); font-size: 13px; text-overflow: ellipsis; white-space: nowrap; }

.progress { height: 6px; border-radius: 99px; background: var(--surface-2); overflow: hidden; }
.progress span { display: block; height: 100%; border-radius: inherit; background: var(--accent); }
.progress-lg { height: 8px; margin-bottom: 10px; }

/* ---------- Continue reading ---------- */

.continue-row {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(280px, 340px);
  gap: 14px;
  margin: 0 -20px 36px;
  padding: 2px 20px 10px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-padding: 20px;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}
.continue-card {
  display: flex;
  gap: 14px;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  scroll-snap-align: start;
  transition: border-color 0.15s;
}
.continue-card:hover { border-color: color-mix(in srgb, var(--accent) 45%, var(--border)); }
.continue-cover { width: 62px; flex: none; }
.continue-cover .ph-author { display: none; }
.continue-info { display: flex; flex: 1; flex-direction: column; justify-content: center; gap: 5px; min-width: 0; }
.continue-info .progress { margin-top: 6px; }
.continue-meta { color: var(--muted); font-size: 12.5px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* ---------- Empty states ---------- */

.empty {
  display: grid;
  justify-items: center;
  gap: 12px;
  padding: 72px 24px;
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  color: var(--muted);
  text-align: center;
}
.empty > .icon { color: var(--accent); }
.empty h2 { color: var(--text); font-family: var(--font-serif); font-size: 26px; font-weight: 600; }
.empty p { max-width: 420px; margin-bottom: 8px; }
.empty-hint { padding: 48px 0; color: var(--muted); text-align: center; }

/* ---------- Book detail ---------- */

.back-link { display: inline-flex; align-items: center; gap: 6px; margin-bottom: 24px; color: var(--muted); font-weight: 550; }
.back-link:hover { color: var(--text); }
.book-detail { display: grid; grid-template-columns: 270px minmax(0, 1fr); gap: 52px; align-items: start; }
.detail-cover { position: sticky; top: 92px; }
.eyebrow { margin-bottom: 8px; color: var(--accent); font-size: 14px; font-weight: 650; }
.detail-title { font-family: var(--font-serif); font-size: clamp(28px, 4vw, 42px); font-weight: 600; letter-spacing: -0.015em; line-height: 1.12; }
.detail-author { margin-top: 10px; color: var(--muted); font-size: 18px; }
.progress-card { margin: 26px 0 20px; padding: 16px 18px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); }
.progress-card p { display: flex; align-items: center; gap: 6px; }
.progress-head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 10px; }
.progress-head strong { font-size: 22px; font-weight: 700; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; }
.description { max-width: 68ch; margin-top: 32px; font-family: var(--font-serif); font-size: 17px; line-height: 1.7; }
.description p + p { margin-top: 1em; }
.facts {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 16px 24px;
  margin: 36px 0 0;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}
.facts dt { color: var(--muted); font-size: 11.5px; font-weight: 700; letter-spacing: 0.07em; text-transform: uppercase; }
.facts dd { margin: 3px 0 0; overflow-wrap: anywhere; }
.facts .wide { grid-column: 1 / -1; }

/* ---------- Dialogs ---------- */

.dialog {
  width: min(580px, calc(100vw - 32px));
  max-height: calc(100vh - 48px);
  padding: 0;
  border: 0;
  border-radius: 18px;
  background: var(--surface);
  color: var(--text);
  box-shadow: var(--pop-shadow);
}
.dialog-sm { width: min(420px, calc(100vw - 32px)); }
.dialog::backdrop { background: rgb(0 0 0 / 0.45); backdrop-filter: blur(2px); }
.dialog > form { padding: 22px 24px 24px; }
.dialog-head { display: flex; align-items: center; justify-content: space-between; }
.dialog-head h2 { font-size: 19px; font-weight: 650; }
.dialog-foot { display: flex; justify-content: flex-end; gap: 10px; margin-top: 4px; }

/* ---------- Admin users ---------- */

.badge { display: inline-block; margin-left: 6px; padding: 2px 8px; border-radius: 99px; background: var(--accent-soft); color: var(--accent); font-size: 11.5px; font-weight: 700; }
.row-actions { display: flex; justify-content: flex-end; gap: 6px; }
.user-list { display: grid; margin: -6px 0; padding: 0; list-style: none; }
.user-row { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 14px; padding: 12px 0; }
.user-row + .user-row { border-top: 1px solid var(--border); }
.user-avatar {
  display: grid;
  place-items: center;
  flex: none;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 700;
}
.user-info { flex: 1 1 180px; min-width: 0; }
.user-name { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 8px; }
.user-name .badge { margin-left: 0; }
.user-row .row-actions { margin-left: auto; }

/* ---------- Statistics ---------- */

.stat-tiles { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; margin-bottom: 20px; }
.stat-tile { display: grid; gap: 4px; padding: 18px 20px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); }
.stat-label { color: var(--muted); font-size: 13px; font-weight: 600; }
.stat-value { font-family: var(--font-serif); font-size: 28px; font-weight: 600; letter-spacing: -0.01em; line-height: 1.15; }
.stat-tiles + .card, .stat-tiles ~ .card + .card { margin-top: 20px; }

.heatmap { overflow-x: auto; padding-bottom: 6px; scrollbar-width: thin; scrollbar-color: var(--border) transparent; }
/* Columns grow to fill the card; below ~11px per week the calendar scrolls instead. */
.heatmap-weeks { display: grid; grid-template-columns: repeat(var(--weeks, 53), minmax(11px, 1fr)); gap: 3px; }
.heat-week { display: grid; grid-template-columns: minmax(0, 1fr); grid-template-rows: 16px; gap: 3px; }
/* Labels overflow into the next weeks instead of widening their own column. */
.heat-month { width: 0; overflow: visible; color: var(--muted); font-size: 11px; line-height: 14px; white-space: nowrap; }
.heat { display: block; width: 100%; aspect-ratio: 1; border-radius: 3px; background: var(--surface-2); }
.heat-legend .heat { width: 12px; }
.heat.l1 { background: color-mix(in srgb, var(--accent) 30%, var(--surface-2)); }
.heat.l2 { background: color-mix(in srgb, var(--accent) 55%, var(--surface-2)); }
.heat.l3 { background: color-mix(in srgb, var(--accent) 80%, var(--surface-2)); }
.heat.l4 { background: var(--accent); }
.heat.future { background: none; }
.heat-legend { display: flex; align-items: center; justify-content: flex-end; gap: 3px; margin-top: 10px; color: var(--muted); font-size: 12px; }
.heat-legend .heat:first-of-type { margin-left: 4px; }
.heat-legend .heat:last-of-type { margin-right: 4px; }

.stat-books { display: grid; margin: 0 -12px; padding: 0; list-style: none; }
.stat-book { display: flex; align-items: center; gap: 14px; padding: 10px 12px; border-radius: var(--radius-sm); }
a.stat-book:hover { background: var(--surface-2); }
.stat-book-cover { width: 40px; flex: none; }
.stat-book-cover .ph-title, .stat-book-cover .ph-author { display: none; }
.stat-book-info { flex: 1; min-width: 0; }
.stat-book-info .book-title { -webkit-line-clamp: 1; }
.stat-book-numbers { display: grid; flex: none; justify-items: end; gap: 2px; text-align: right; }
.stat-book-numbers strong { font-size: 15px; }
.stat-book-numbers span { color: var(--muted); font-size: 12.5px; }
.stats-empty .steps { margin-top: 0; }
.reading-time { margin-top: 4px; }
.sync-note { margin-top: 14px; }
code:not(.copy-value) { padding: 1px 6px; border-radius: 6px; background: var(--surface-2); overflow-wrap: anywhere; }
.link { color: var(--accent); text-decoration: underline; text-underline-offset: 2px; }

/* ---------- Upload ---------- */

.drop-overlay {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: grid;
  place-items: center;
  padding: 24px;
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.drop-box {
  display: grid;
  justify-items: center;
  gap: 12px;
  padding: 56px 64px;
  border: 2px dashed var(--accent);
  border-radius: 22px;
  background: var(--surface);
  color: var(--accent);
  font-size: 18px;
  font-weight: 650;
  pointer-events: none;
}
.upload-panel {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 50;
  width: min(370px, calc(100vw - 32px));
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--pop-shadow);
  animation: rise 0.2s ease-out;
}
.upload-head { display: flex; align-items: center; justify-content: space-between; padding: 8px 8px 8px 16px; border-bottom: 1px solid var(--border); font-weight: 650; }
.upload-list { max-height: 300px; margin: 0; padding: 6px 0; overflow-y: auto; list-style: none; }
.upload-item { display: grid; gap: 6px; padding: 8px 16px; }
.upload-row { display: flex; justify-content: space-between; gap: 12px; font-size: 14px; }
.upload-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.upload-state { flex: none; color: var(--muted); font-size: 13px; }
.upload-item .progress { height: 4px; }
.upload-item.is-done .upload-state { color: var(--accent); }
.upload-item.is-skipped .upload-state { color: var(--muted); }
.upload-item.is-skipped .progress span { background: var(--muted); }
.upload-item.is-error .upload-state { color: var(--danger); white-space: normal; text-align: right; }
.upload-item.is-error .progress span { background: var(--danger); }
.upload-item a { text-decoration: underline; }

@keyframes rise { from { opacity: 0; transform: translateY(8px); } }

/* ---------- Responsive ---------- */

@media (max-width: 760px) {
  .container { padding: 18px 16px 96px; }
  .topbar-inner { padding: 8px 16px; gap: 6px; }
  .nav span, .btn-upload span { display: none; }
  .nav a { padding: 9px; }
  .btn-upload { width: 40px; padding: 0; }
  .toolbar { flex-wrap: wrap; }
  .search { flex-basis: 100%; }
  .select { flex: 1; }
  .continue-row { margin: 0 -16px 32px; padding: 2px 16px 10px; grid-auto-columns: minmax(260px, 82vw); }
  .book-detail { grid-template-columns: 1fr; gap: 28px; }
  .detail-cover { position: static; width: min(200px, 55vw); margin: 0 auto; }
  .detail-info { text-align: left; }
  .form-row { grid-template-columns: minmax(0, 1fr) 96px; }
  .actions { display: grid; grid-template-columns: 1fr 1fr; }
  .actions form, .actions .btn { width: 100%; }
  .btn-copy span { display: none; }
  .btn-copy { width: 46px; padding: 0; }
  .card h2 { font-size: 16px; }
  .page-head { margin-bottom: 18px; }
  .user-row .row-actions { margin-left: 52px; }
  /* Dialogs become bottom sheets with the actions always in reach. */
  .dialog { width: 100%; max-width: none; max-height: 92vh; margin: auto 0 0; border-radius: 18px 18px 0 0; }
  .dialog-sm { width: 100%; }
  .dialog > form { padding: 18px 16px 0; }
  .dialog-foot {
    position: sticky;
    bottom: 0;
    margin: 4px -16px 0;
    padding: 12px 16px calc(12px + env(safe-area-inset-bottom));
    border-top: 1px solid var(--border);
    background: var(--surface);
  }
  .dialog-foot .btn { flex: 1; }
  .stat-tiles { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
  .stat-tile { padding: 14px 16px; }
  .stat-value { font-size: 23px; }
  .stat-book-numbers span { display: none; }
  .card { padding: 20px; }
  .upload-panel { right: 16px; bottom: 16px; }
}

@media (max-width: 374px) {
  .brand span { display: none; }
  .nav a { padding: 8px; }
}

@media (max-width: 520px) {
  .grid { grid-template-columns: repeat(auto-fill, minmax(100px, 1fr)); gap: 22px 12px; }
  .book-title { font-size: 13px; }
  .book-author { font-size: 12px; }
  .page-title { font-size: 28px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
}