:root {
  color-scheme: dark;
  --bg: #0b1020;
  --bg-soft: #11182c;
  --panel: rgba(17, 24, 39, 0.82);
  --surface: rgba(255, 255, 255, 0.04);
  --border: rgba(148, 163, 184, 0.18);
  --border-strong: rgba(148, 163, 184, 0.28);
  --text: #e5eefb;
  --muted: #94a3b8;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --danger: #dc2626;
  --danger-hover: #b91c1c;
  --shadow: 0 18px 50px rgba(2, 6, 23, 0.35);
  font-family: Inter, system-ui, sans-serif;
}
* { box-sizing: border-box; }
html, body { min-height: 100%; }
body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at top, rgba(59, 130, 246, 0.12), transparent 32%),
    linear-gradient(180deg, #0a0f1d 0%, #0b1020 100%);
}
button, input, textarea, select { font: inherit; border-radius: 14px; }
button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible { outline: 2px solid rgba(96, 165, 250, 0.9); outline-offset: 2px; }
.shell { min-height: 100vh; padding: 20px 16px 40px; }
.container { width: min(1120px, 100%); margin: 0 auto; }
.auth-shell { min-height: calc(100vh - 76px); display: grid; place-items: center; }
.auth-card { width: min(460px, 100%); }
.card { background: var(--panel); backdrop-filter: blur(14px); border: 1px solid var(--border); border-radius: 24px; padding: 24px; box-shadow: var(--shadow); }
.compact-card { padding-top: 18px; padding-bottom: 18px; }
.topbar { display: flex; justify-content: space-between; gap: 16px; align-items: center; margin-bottom: 16px; }
.topbar-main { min-width: 0; }
.topbar-row { display: flex; align-items: center; gap: 12px; }
.topbar-title { font-size: clamp(1.5rem, 2.8vw, 2rem); line-height: 1.05; margin-top: 8px; }
.topbar-subtitle { margin-top: 6px; line-height: 1.45; }
.topbar-actions { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.eyebrow, .section-kicker { color: #7dd3fc; text-transform: uppercase; letter-spacing: 0.14em; font-size: 0.75rem; font-weight: 700; }
.section-kicker { margin-bottom: 8px; }
h1, h2, h3, p { margin: 0; }
h1 { font-size: clamp(2rem, 4vw, 2.8rem); line-height: 1.05; margin-top: 10px; }
h2 { font-size: 1.15rem; line-height: 1.2; }
h3 { font-size: 1.1rem; line-height: 1.3; }
.lede { margin-top: 12px; line-height: 1.6; max-width: 62ch; }
.muted { color: var(--muted); }
.error { color: #fca5a5; }
.hidden { display: none !important; }
.content-grid { display: grid; gap: 16px; }
.single-column { grid-template-columns: 1fr; }
.stack { display: grid; gap: 16px; }
.auth-form { margin-top: 22px; }
label { display: grid; gap: 8px; }
label span { color: #cbd5e1; font-size: 0.95rem; }
input, textarea, select { width: 100%; padding: 13px 15px; border: 1px solid var(--border-strong); background: rgba(15, 23, 42, 0.86); color: var(--text); font-size: 16px; }
textarea { resize: vertical; min-height: 120px; }
button { border: none; padding: 12px 16px; background: var(--accent); color: white; cursor: pointer; transition: background-color 0.15s ease, transform 0.15s ease, opacity 0.15s ease; }
button:hover { background: var(--accent-hover); transform: translateY(-1px); }
button:disabled { opacity: 0.7; cursor: not-allowed; transform: none; }
button.secondary { background: rgba(148, 163, 184, 0.14); color: var(--text); border: 1px solid var(--border); }
button.secondary:hover { background: rgba(148, 163, 184, 0.2); }
button.ghost { background: transparent; color: var(--muted); border: 1px solid var(--border); }
button.ghost:hover { background: rgba(148, 163, 184, 0.08); color: var(--text); }
button.danger { background: rgba(220, 38, 38, 0.92); }
button.danger:hover { background: var(--danger-hover); }
.section-header, .form-header, .pagination-controls, .book-actions, .page-size-control, .list-header-actions, .list-toolbar, .filters-toolbar { display: flex; gap: 12px; align-items: center; }
.section-header, .form-header { justify-content: space-between; margin-bottom: 14px; }
.slim-header { margin-bottom: 12px; }
.list-header-actions { flex-wrap: wrap; justify-content: flex-start; }
.surface { background: var(--surface); border: 1px solid rgba(148, 163, 184, 0.12); border-radius: 18px; padding: 14px 16px; }
.stats-panel, .form-panel { margin: 0; }
.stats-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; }
.stat-card { min-width: 0; }
.stat-label { color: var(--muted); font-size: 0.9rem; margin-bottom: 10px; }
.stat-value { font-size: clamp(1.15rem, 2.2vw, 1.7rem); font-weight: 700; line-height: 1.1; color: var(--text); overflow-wrap: anywhere; }
.year-chart-card { margin-top: 14px; }
.year-chart { display: grid; gap: 10px; margin-top: 10px; }
.year-chart-row { display: grid; grid-template-columns: 56px minmax(0, 1fr) 32px; gap: 10px; align-items: center; }
.year-chart-label, .year-chart-value { color: var(--muted); font-size: 0.9rem; }
.year-chart-bar-wrap { height: 10px; border-radius: 999px; background: rgba(148, 163, 184, 0.12); overflow: hidden; }
.year-chart-bar { height: 100%; border-radius: 999px; background: linear-gradient(90deg, #38bdf8 0%, #3b82f6 100%); }
.form-card { padding: 24px; }
.filters-toolbar, .list-toolbar { justify-content: space-between; flex-wrap: wrap; margin-bottom: 14px; background: var(--surface); border: 1px solid rgba(148, 163, 184, 0.12); border-radius: 18px; padding: 12px 14px; }
.filter-control { min-width: 0; flex: 1 1 240px; }
.page-size-control { min-width: 0; }
.page-size-control span { color: var(--muted); white-space: nowrap; }
.page-size-control select { width: auto; min-width: 96px; padding-right: 40px; }
.list-toolbar .muted { margin-left: auto; font-size: 0.95rem; line-height: 1.4; text-align: right; max-width: 100%; overflow-wrap: anywhere; }
.empty-state { padding: 18px; border-radius: 18px; border: 1px dashed rgba(148, 163, 184, 0.22); background: rgba(148, 163, 184, 0.03); }
.books-list { display: grid; gap: 12px; }
.book-item { border: 1px solid rgba(148, 163, 184, 0.16); border-radius: 18px; padding: 16px 18px; background: rgba(15, 23, 42, 0.58); overflow-wrap: anywhere; }
.book-layout { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 18px; align-items: start; }
.book-layout--compact { align-items: center; }
.book-content { min-width: 0; }
.book-head { display: grid; gap: 6px; }
.book-author { color: var(--muted); font-size: 0.95rem; line-height: 1.4; }
.book-meta { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.book-meta span { display: inline-flex; align-items: center; gap: 6px; padding: 6px 10px; border-radius: 999px; background: rgba(148, 163, 184, 0.09); color: #cbd5e1; font-size: 0.9rem; }
.book-rating { display: inline-flex; align-items: center; gap: 8px; }
.rating-stars { color: #fbbf24; letter-spacing: 0.02em; font-size: 0.9rem; }
.rating-number { color: var(--muted); font-size: 0.82rem; }
.book-comment { margin-top: 12px; line-height: 1.55; color: #dbe7f5; }
.book-side { display: flex; align-self: stretch; }
.book-actions { flex-direction: column; align-items: stretch; justify-content: flex-start; gap: 8px; margin: 0; padding: 0; border-top: none; }
.icon-button { width: 42px; height: 42px; padding: 0; display: inline-flex; align-items: center; justify-content: center; font-size: 1rem; line-height: 1; }
.pagination-controls { justify-content: center; margin-top: 16px; flex-wrap: wrap; }
.pagination-controls span { min-width: 140px; text-align: center; }
@media (max-width: 900px) {
  .stats-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .book-layout { grid-template-columns: 1fr; gap: 14px; }
  .book-side { width: 100%; }
  .book-actions { flex-direction: row; width: 100%; }
  .icon-button { width: 44px; height: 44px; }
}
@media (max-width: 640px) {
  .shell { padding: 12px 10px 28px; }
  .card, .form-card { border-radius: 20px; padding: 18px; }
  .topbar, .section-header, .form-header, .pagination-controls, .page-size-control, .list-header-actions, .list-toolbar, .filters-toolbar, .book-actions { flex-direction: column; align-items: stretch; }
  .topbar-actions, .topbar-actions button, .section-header button, .form-header button, .list-header-actions button, .pagination-controls button, button { width: 100%; }
  .stats-grid { grid-template-columns: 1fr; }
  .list-toolbar .muted { margin-left: 0; text-align: left; }
  .pagination-controls span { min-width: 0; }
  .book-layout, .book-layout--compact { grid-template-columns: 1fr; gap: 14px; }
  .book-meta { flex-direction: column; }
  .book-meta span { width: 100%; justify-content: flex-start; border-radius: 14px; }
  .book-actions { width: 100%; }
  .icon-button { width: 100%; height: 44px; }
  .year-chart-row { grid-template-columns: 1fr; }
}