:root {
  color-scheme: dark;
  font-family: Arial, Helvetica, sans-serif;
  --bg: #0f172a;
  --bg-accent: #1e293b;
  --card: #111827;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --accent: #38bdf8;
  --danger: #f87171;
  --input-bg: #0b1220;
  --chip-bg: #1f2937;
  --button-secondary-bg: #334155;
  --button-primary-text: #00111a;
  --pointer: #f8fafc;
  --wheel-border: rgba(255, 255, 255, 0.08);
  --backdrop: rgba(2, 6, 23, 0.72);
  --card-border: rgba(148, 163, 184, 0.18);
}

[data-theme="light"] {
  color-scheme: light;
  --bg: #f4f7fb;
  --bg-accent: #ffffff;
  --card: #ffffff;
  --text: #0f172a;
  --muted: #475569;
  --accent: #0284c7;
  --danger: #dc2626;
  --input-bg: #f8fafc;
  --chip-bg: #e2e8f0;
  --button-secondary-bg: #cbd5e1;
  --button-primary-text: #ffffff;
  --pointer: #0f172a;
  --wheel-border: rgba(15, 23, 42, 0.2);
  --backdrop: rgba(15, 23, 42, 0.35);
  --card-border: rgba(100, 116, 139, 0.28);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(circle at top, var(--bg-accent), var(--bg));
  color: var(--text);
  transition: background 220ms ease, color 220ms ease;
}

.shell {
  width: min(1180px, calc(100% - 32px));
  margin: 24px auto 48px;
}

.app-footer {
  width: min(1180px, calc(100% - 32px));
  margin: -24px auto 24px;
  display: flex;
  justify-content: center;
}

.card {
  background: color-mix(in srgb, var(--card) 92%, transparent);
  border: 1px solid var(--card-border);
  border-radius: 18px;
  padding: 20px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.24);
}

.grid {
  display: grid;
  gap: 20px;
  grid-template-columns: 1fr 1fr;
  margin: 20px 0;
}

.app {
  display: grid;
  gap: 20px;
}

.top-wheel {
  margin-top: 0;
}

.management-grid {
  margin: 0;
  align-items: start;
  grid-template-columns: 1fr;
}

.books-card {
  display: grid;
  gap: 12px;
}

.stack {
  display: grid;
  gap: 12px;
}

label {
  display: grid;
  gap: 6px;
  color: var(--muted);
}

input, button {
  border: 0;
  border-radius: 12px;
  padding: 12px 14px;
  font: inherit;
}

button:focus-visible,
input:focus-visible,
.book-title-btn:focus-visible,
#wheelCanvas:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--accent) 72%, #ffffff 28%);
  outline-offset: 2px;
}

input {
  background: var(--input-bg);
  color: var(--text);
  border: 1px solid rgba(148, 163, 184, 0.2);
}

button {
  background: var(--accent);
  color: var(--button-primary-text);
  font-weight: 700;
  cursor: pointer;
}

button.secondary {
  background: var(--button-secondary-bg);
  color: var(--text);
}

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.hidden { display: none; }
.error { color: var(--danger); min-height: 1.2em; }
.message { color: var(--muted); min-height: 1.2em; }

.selected-book {
  min-height: 1.6em;
  font-size: 1.35rem;
  font-weight: 800;
  color: color-mix(in srgb, var(--text) 70%, var(--accent));
  text-shadow: 0 0 18px rgba(56, 189, 248, 0.45);
  letter-spacing: 0.02em;
}

.selected-book:empty {
  min-height: 1.6em;
}

.selected-book:not(:empty) {
  padding: 6px 12px;
  border-radius: 12px;
  background: color-mix(in srgb, var(--accent) 22%, transparent);
  border: 1px solid rgba(56, 189, 248, 0.35);
}
.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.toolbar-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
}

.icon-glyph {
  font-size: 1.2rem;
  line-height: 1;
}

.wheel-card { display: grid; justify-items: center; gap: 14px; }
.wheel-wrap {
  position: relative;
  width: 420px;
  height: 420px;
}

#wheelCanvas {
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: var(--input-bg);
  border: 10px solid var(--wheel-border);
  transform: rotate(0deg);
  transition: transform 4s cubic-bezier(0.15, 0.8, 0.2, 1);
}

.pointer {
  position: absolute;
  top: -2px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 0;
  border-left: 16px solid transparent;
  border-right: 16px solid transparent;
  border-top: 30px solid var(--pointer);
  filter: drop-shadow(0 3px 4px rgba(0, 0, 0, 0.35));
}

.book-list {
  display: grid;
  gap: 10px;
}

.books-empty-state {
  display: grid;
  gap: 6px;
  padding: 14px;
  border-radius: 12px;
  border: 1px dashed rgba(148, 163, 184, 0.35);
  background: color-mix(in srgb, var(--chip-bg) 60%, transparent);
}

.books-empty-state h3 {
  margin: 0;
  font-size: 1rem;
}

.book-add-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
}

.book-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 12px;
  background: var(--chip-bg);
  border: 1px solid rgba(148, 163, 184, 0.16);
}

.book-row-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.book-title-btn {
  background: transparent;
  color: var(--text);
  padding: 0;
  font-weight: 700;
  text-align: left;
  border-radius: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.book-remove-btn {
  background: #7f1d1d;
  color: #fee2e2;
  padding: 8px 10px;
}

.pagination {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
}

.pagination .message {
  min-height: 0;
}

.actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.checkbox-row {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text);
}

.user-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  padding: 12px;
  border-radius: 12px;
  background: var(--chip-bg);
  border: 1px solid rgba(148, 163, 184, 0.16);
}

.user-row-header {
  font-weight: 700;
}

.user-input {
  width: 100%;
}

.user-management-dialog {
  width: min(1225px, calc(100% - 24px));
  max-height: min(90vh, 760px);
  padding: 0;
  background: var(--card);
  border: 1px solid var(--card-border);
  box-shadow: 0 16px 44px rgba(0, 0, 0, 0.34);
  overflow: hidden;
}

.user-management-shell {
  gap: 14px;
  padding: 20px;
  max-height: min(90vh, 760px);
  background: var(--card);
  overflow-y: auto;
  overflow-x: hidden;
  scrollbar-width: thin;
  scrollbar-color: color-mix(in srgb, var(--accent) 58%, var(--chip-bg)) color-mix(in srgb, var(--chip-bg) 88%, transparent);
}

.user-management-shell::-webkit-scrollbar {
  width: 10px;
}

.user-management-shell::-webkit-scrollbar-track {
  background: color-mix(in srgb, var(--chip-bg) 88%, transparent);
  border-radius: 999px;
}

.user-management-shell::-webkit-scrollbar-thumb {
  background: color-mix(in srgb, var(--accent) 58%, var(--chip-bg));
  border-radius: 999px;
  border: 2px solid color-mix(in srgb, var(--chip-bg) 88%, transparent);
}

.user-management-header {
  display: grid;
  gap: 8px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(148, 163, 184, 0.2);
}

.user-management-header h2 {
  margin: 0;
  letter-spacing: 0.02em;
}

.user-management-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.user-management-kicker {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text);
  background: color-mix(in srgb, var(--accent) 25%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 50%, transparent);
}

.user-management-layout {
  display: grid;
  gap: 14px;
  grid-template-columns: minmax(260px, 320px) minmax(0, 1fr);
  align-items: start;
  background: var(--card);
}

.user-create-panel,
.user-list-panel {
  gap: 14px;
  border: 1px solid rgba(148, 163, 184, 0.25);
  background: color-mix(in srgb, var(--card) 92%, var(--bg-accent));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.03), 0 8px 24px rgba(0, 0, 0, 0.16);
}

.user-create-panel h3,
.user-list-panel h3 {
  margin: 0;
}

.section-title-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 2px 8px;
  font-size: 0.74rem;
  font-weight: 700;
  color: var(--muted);
  border: 1px solid rgba(148, 163, 184, 0.3);
  background: color-mix(in srgb, var(--chip-bg) 78%, transparent);
}

.user-create-actions {
  justify-content: flex-end;
}

.user-create-panel input {
  transition: border-color 140ms ease, box-shadow 140ms ease;
}

.user-create-panel input:focus {
  outline: none;
  border-color: color-mix(in srgb, var(--accent) 72%, #ffffff 28%);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 26%, transparent);
}

.user-list-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.count-badge {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text);
  background: color-mix(in srgb, var(--accent) 22%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 52%, transparent);
}

.user-search-label {
  position: sticky;
  top: 0;
  z-index: 2;
  padding: 10px;
  margin: 0 -2px;
  border-radius: 12px;
  background: color-mix(in srgb, var(--card) 90%, transparent);
  border: 1px solid rgba(148, 163, 184, 0.18);
}

.user-row {
  gap: 12px;
  padding: 14px;
  border: 1px solid rgba(148, 163, 184, 0.24);
  background: linear-gradient(
    165deg,
    color-mix(in srgb, var(--chip-bg) 86%, transparent),
    color-mix(in srgb, var(--chip-bg) 72%, var(--bg-accent) 28%)
  );
  transition: border-color 140ms ease, transform 140ms ease, box-shadow 140ms ease;
}

.user-row:hover {
  transform: translateY(-1px);
  border-color: color-mix(in srgb, var(--accent) 34%, rgba(148, 163, 184, 0.24));
  box-shadow: 0 8px 18px rgba(0, 0, 0, 0.14);
}

.user-row-header {
  display: grid;
  gap: 6px;
}

.user-name-line {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.user-name-text {
  font-weight: 800;
}

.user-meta-line {
  font-size: 0.82rem;
  color: var(--muted);
}

.user-role-pill {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 3px 9px;
  font-size: 0.8rem;
  font-weight: 700;
  background: color-mix(in srgb, var(--chip-bg) 60%, var(--accent) 40%);
  border: 1px solid rgba(148, 163, 184, 0.3);
}

.user-edit-grid {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  align-items: end;
}

.user-edit-grid .checkbox-row {
  margin-bottom: 10px;
}

.user-row-actions {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 8px;
}

.user-row-actions button {
  min-width: 108px;
}

.user-delete-btn {
  background: #7f1d1d;
  color: #fee2e2;
}

.user-row-disabled {
  opacity: 0.75;
}

.user-list-empty {
  display: grid;
  place-items: center;
  min-height: 120px;
  padding: 18px;
  border-radius: 12px;
  border: 1px dashed rgba(148, 163, 184, 0.38);
  background: color-mix(in srgb, var(--chip-bg) 54%, transparent);
  text-align: center;
}

.modal {
  border: 1px solid rgba(148, 163, 184, 0.22);
  border-radius: 18px;
  padding: 0;
  background: var(--card);
  color: var(--text);
  width: min(520px, calc(100% - 24px));
}

.modal::backdrop {
  background: var(--backdrop);
}

.modal form {
  padding: 20px;
  background: var(--card);
  border-radius: 18px;
}

.toast-region {
  position: fixed;
  right: 14px;
  bottom: 14px;
  z-index: 220;
  display: grid;
  gap: 8px;
  width: min(320px, calc(100% - 24px));
}

.toast {
  border-radius: 12px;
  border: 1px solid rgba(148, 163, 184, 0.22);
  background: color-mix(in srgb, var(--card) 92%, var(--bg-accent));
  color: var(--text);
  padding: 10px 12px;
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.28);
  animation: toast-in 180ms ease;
}

.toast-success {
  border-color: rgba(34, 197, 94, 0.6);
}

.toast-error {
  border-color: rgba(239, 68, 68, 0.7);
}

.toast-info {
  border-color: rgba(56, 189, 248, 0.6);
}

.toast-exit {
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 220ms ease, transform 220ms ease;
}

@keyframes toast-in {
  from {
    opacity: 0;
    transform: translateY(10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.modal-actions {
  justify-content: flex-end;
}

.transfer-modal {
  width: min(900px, calc(100% - 24px));
}

.tab-row {
  background: color-mix(in srgb, var(--input-bg) 72%, transparent);
  border: 1px solid rgba(148, 163, 184, 0.22);
  border-radius: 14px;
  padding: 6px;
  display: flex;
  gap: 8px;
}

.tab-btn {
  flex: 1 1 0;
  text-align: center;
  border: 1px solid rgba(148, 163, 184, 0.2);
  transition: background 160ms ease, color 160ms ease, border-color 160ms ease, transform 120ms ease;
}

.tab-btn:hover {
  transform: translateY(-1px);
}

.tab-btn.active {
  background: var(--accent);
  color: var(--button-primary-text);
  border-color: color-mix(in srgb, var(--accent) 70%, #ffffff 30%);
  box-shadow: 0 6px 18px color-mix(in srgb, var(--accent) 32%, transparent);
}

.tab-panel {
  display: grid;
  gap: 10px;
  border: 1px solid rgba(148, 163, 184, 0.22);
  border-radius: 14px;
  padding: 14px;
  background: color-mix(in srgb, var(--card) 96%, transparent);
}

.tab-panel.hidden {
  display: none;
}

.json-textarea {
  width: 100%;
  min-height: 200px;
  resize: vertical;
  border-radius: 12px;
  border: 1px solid rgba(148, 163, 184, 0.28);
  padding: 12px;
  font: 0.95rem/1.4 Consolas, "Courier New", monospace;
  background: var(--input-bg);
  color: var(--text);
}

@media (max-width: 900px) {
  .shell {
    width: calc(100% - 20px);
    margin: 12px auto 40px;
  }

  .toolbar {
    align-items: start;
    flex-direction: column;
    gap: 10px;
  }

  .toolbar-actions {
    width: 100%;
    flex-wrap: wrap;
    justify-content: flex-end;
  }

  .grid { grid-template-columns: 1fr; }
  .wheel-wrap {
    width: min(92vw, 380px);
    height: min(92vw, 380px);
  }

  #wheelCanvas {
    width: 100%;
    height: 100%;
  }

  .pointer {
    border-left-width: 12px;
    border-right-width: 12px;
    border-top-width: 24px;
  }

  .book-add-row {
    grid-template-columns: 1fr;
  }
  .book-row {
    grid-template-columns: 1fr;
    gap: 8px;
  }
  .book-row-actions {
    justify-content: flex-end;
  }
  .user-management-layout {
    grid-template-columns: 1fr;
  }
  .user-management-title-row {
    align-items: start;
    flex-direction: column;
  }
  .user-list-header-row {
    align-items: start;
    flex-direction: column;
  }
  .user-edit-grid {
    grid-template-columns: 1fr;
  }

  .user-row-actions {
    justify-content: stretch;
    flex-direction: column;
  }

  .user-row-actions button {
    width: 100%;
  }

  .user-edit-grid .checkbox-row {
    margin-bottom: 0;
  }
}