/* ============================================================
   components.css — UI components
   Buttons, forms, cards, tables, badges, modals, toasts.
   Kept in a single file for easy reference; each block is
   labeled.
   ============================================================ */

/* ---- Cards --------------------------------------------- */
.card {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  box-shadow: var(--shadow-sm);
}

.card--padded { padding: var(--space-6); }

.card--feature {
  /* Slightly darker top border line to add weight, like a
     classic ledger card. */
  border-top: 3px solid var(--color-accent);
}

/* ---- Stat tiles ---------------------------------------- */
.stat {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  position: relative;
  overflow: hidden;
}

.stat__label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-text-subtle);
  margin-bottom: var(--space-3);
}

.stat__value {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 400;
  line-height: 1;
  font-variation-settings: 'opsz' 144;
  color: var(--color-text);
}

.stat__hint {
  margin-top: var(--space-2);
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.stat--accent .stat__value { color: var(--color-accent); }
.stat--warning .stat__value { color: var(--color-warning); }
.stat--danger .stat__value { color: var(--color-danger); }

/* ---- Buttons ------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.55rem 1.1rem;
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background var(--t-fast), color var(--t-fast),
              border-color var(--t-fast), transform var(--t-fast);
  white-space: nowrap;
}

.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn--primary {
  background-color: var(--color-accent);
  color: var(--color-card);
  border-color: var(--color-accent);
}
.btn--primary:hover:not(:disabled) {
  background-color: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
}

.btn--secondary {
  background-color: var(--color-card);
  color: var(--color-text);
  border-color: var(--color-border-strong);
}
.btn--secondary:hover:not(:disabled) {
  background-color: var(--color-card-alt);
  border-color: var(--color-text-muted);
}

.btn--ghost {
  background-color: transparent;
  color: var(--color-text-muted);
  border-color: transparent;
}
.btn--ghost:hover:not(:disabled) {
  color: var(--color-text);
  background-color: var(--color-card-alt);
}

.btn--danger {
  background-color: var(--color-danger);
  color: var(--color-card);
  border-color: var(--color-danger);
}
.btn--danger:hover:not(:disabled) {
  background-color: #6e2020;
  border-color: #6e2020;
}

.btn--sm {
  padding: 0.35rem 0.75rem;
  font-size: 0.8125rem;
}

.btn--block {
  width: 100%;
}

/* ---- Forms --------------------------------------------- */
.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-5) var(--space-4);
}

.form-grid__full { grid-column: 1 / -1; }

@media (max-width: 600px) {
  .form-grid { grid-template-columns: 1fr; }
}

.field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.field__label {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-text);
  letter-spacing: 0.01em;
}

.field__hint {
  font-size: 0.75rem;
  color: var(--color-text-subtle);
}

.field__error {
  font-size: 0.75rem;
  color: var(--color-danger);
  display: none;
}

.field--invalid .field__error { display: block; }
.field--invalid input,
.field--invalid select { border-color: var(--color-danger); }

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="search"],
select,
textarea {
  width: 100%;
  padding: 0.55rem 0.75rem;
  font-size: 0.9375rem;
  background-color: var(--color-card);
  color: var(--color-text);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  transition: border-color var(--t-fast), box-shadow var(--t-fast);
}

input:hover:not(:focus),
select:hover:not(:focus) {
  border-color: var(--color-text-muted);
}

input:focus,
select:focus,
textarea:focus {
  outline: 0;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-soft);
}

select {
  appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--color-text-muted) 50%),
                    linear-gradient(135deg, var(--color-text-muted) 50%, transparent 50%);
  background-position: calc(100% - 18px) 50%, calc(100% - 13px) 50%;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
  padding-right: 2rem;
}

/* Checkbox row — used for "Available" toggle */
.checkbox-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) 0;
}

.checkbox-row input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--color-accent);
}

.form-actions {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-3);
  margin-top: var(--space-6);
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-border);
}

@media (max-width: 480px) {
  .form-actions { flex-direction: column-reverse; }
  .form-actions .btn { width: 100%; }
}

/* ---- Toolbar (search + filters) ------------------------ */
.toolbar {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 1fr) minmax(0, 1fr) auto;
  gap: var(--space-3);
  padding: var(--space-4);
  margin-bottom: var(--space-5);
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  align-items: end;
}

.toolbar .field { gap: var(--space-1); }
.toolbar .field__label {
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text-subtle);
  font-weight: 600;
}

.toolbar__count {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  white-space: nowrap;
}

@media (max-width: 880px) {
  .toolbar {
    grid-template-columns: 1fr 1fr;
  }
  .toolbar__search { grid-column: 1 / -1; }
  .toolbar__count  { grid-column: 1 / -1; text-align: right; }
}

@media (max-width: 480px) {
  .toolbar { grid-template-columns: 1fr; }
}

/* ---- Tables -------------------------------------------- */
.table-wrap {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.table thead th {
  text-align: left;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-text-subtle);
  padding: var(--space-3) var(--space-4);
  background-color: var(--color-card-alt);
  border-bottom: 1px solid var(--color-border);
}

.table tbody td {
  padding: var(--space-4);
  border-bottom: 1px solid var(--color-border);
  vertical-align: middle;
}

.table tbody tr:last-child td { border-bottom: 0; }

.table tbody tr {
  transition: background var(--t-fast);
  cursor: pointer;
}

.table tbody tr:hover {
  background-color: var(--color-card-alt);
}

.table__title {
  font-weight: 500;
  color: var(--color-text);
  display: block;
}

.table__sub {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  display: block;
  margin-top: 2px;
}

.table__actions {
  display: flex;
  gap: var(--space-2);
  justify-content: flex-end;
}

.table__empty {
  padding: var(--space-7) var(--space-5);
  text-align: center;
  color: var(--color-text-muted);
}

/* Mobile table — stack each row as a card */
@media (max-width: 720px) {
  .table thead { display: none; }
  .table, .table tbody, .table tr, .table td { display: block; width: 100%; }
  .table tbody tr {
    padding: var(--space-4);
    border-bottom: 1px solid var(--color-border);
  }
  .table tbody td {
    padding: var(--space-1) 0;
    border: 0;
  }
  .table tbody td[data-label]::before {
    content: attr(data-label);
    display: inline-block;
    min-width: 90px;
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--color-text-subtle);
  }
  .table__actions { justify-content: flex-start; margin-top: var(--space-2); }
}

/* ---- Badges -------------------------------------------- */
.badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
}

.badge--available {
  color: var(--color-success);
  background-color: var(--color-success-soft);
}

.badge--checked-out {
  color: var(--color-info);
  background-color: var(--color-info-soft);
}

.badge--due-soon {
  color: var(--color-warning);
  background-color: var(--color-warning-soft);
}

.badge--overdue {
  color: var(--color-danger);
  background-color: var(--color-danger-soft);
}

.badge--genre {
  color: var(--color-text-muted);
  background-color: var(--color-bg-deep);
  letter-spacing: 0.06em;
  text-transform: none;
  font-weight: 500;
}

/* ---- Book detail header -------------------------------- */
.book-detail__top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-5);
  padding-bottom: var(--space-5);
  margin-bottom: var(--space-5);
  border-bottom: 1px solid var(--color-border);
}

.book-detail__title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3vw + 1rem, 2.75rem);
  line-height: 1.05;
  font-variation-settings: 'opsz' 144, 'SOFT' 30;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.book-detail__author {
  font-size: 1.05rem;
  color: var(--color-text-muted);
}

.book-detail__author em {
  font-family: var(--font-display);
  font-style: italic;
  color: var(--color-text);
  font-weight: 500;
}

.book-detail__actions {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

/* Definition list grid for metadata */
.dl-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-5) var(--space-6);
  padding: var(--space-2) 0;
}

.dl-grid > div {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.dl-grid dt {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-text-subtle);
}

.dl-grid dd {
  margin: 0;
  font-size: 0.95rem;
  color: var(--color-text);
}

.dl-grid dd.mono {
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

/* ---- Reminder list (dashboard) ------------------------- */
.reminder-list { display: flex; flex-direction: column; }

.reminder {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-border);
}

.reminder:last-child { border-bottom: 0; }

.reminder__title {
  font-weight: 500;
  margin-bottom: 2px;
}

.reminder__sub {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

/* ---- Modal --------------------------------------------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(26, 22, 18, 0.55);
  backdrop-filter: blur(2px);
  display: grid;
  place-items: center;
  z-index: 100;
  padding: var(--space-4);
  animation: modalFadeIn 150ms ease;
}

.modal {
  background-color: var(--color-card);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  max-width: 480px;
  width: 100%;
  box-shadow: var(--shadow-lg);
  border-top: 3px solid var(--color-accent);
  animation: modalSlideUp 200ms ease;
}

.modal__title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 500;
  margin-bottom: var(--space-3);
}

.modal__message {
  color: var(--color-text-muted);
  margin-bottom: var(--space-5);
  line-height: 1.55;
}

.modal__actions {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-2);
}

@keyframes modalFadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes modalSlideUp {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ---- Toast notifications ------------------------------- */
.toast-container {
  position: fixed;
  top: var(--space-5);
  right: var(--space-5);
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  pointer-events: none;
}

.toast {
  background-color: var(--color-text);
  color: var(--color-card);
  padding: 0.7rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  box-shadow: var(--shadow-lg);
  min-width: 240px;
  max-width: 360px;
  opacity: 0;
  transform: translateX(20px);
  transition: opacity var(--t-base), transform var(--t-base);
  pointer-events: auto;
  border-left: 3px solid var(--color-text-muted);
}

.toast--visible {
  opacity: 1;
  transform: translateX(0);
}

.toast--success { border-left-color: #7da06d; }
.toast--error   { border-left-color: #c66464; }

/* ---- Login layout -------------------------------------- */
.login-shell {
  flex: 1;
  display: grid;
  place-items: center;
  padding: var(--space-6) var(--space-4);
}

.login-card {
  background-color: var(--color-card);
  border-radius: var(--radius-md);
  padding: var(--space-7) var(--space-6);
  width: 100%;
  max-width: 420px;
  box-shadow: var(--shadow-md);
  border-top: 3px solid var(--color-accent);
}

.login-card__brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
  text-align: center;
}

.login-card__brand-mark {
  display: grid;
  place-items: center;
  width: 56px;
  height: 56px;
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 500;
  font-variation-settings: 'opsz' 144;
  background-color: var(--color-accent);
  color: var(--color-card);
  border-radius: var(--radius-sm);
}

.login-card__name {
  font-family: var(--font-display);
  font-size: 1.5rem;
}

.login-card__sub {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-text-subtle);
  margin-top: var(--space-1);
}

.login-card__demo {
  margin-top: var(--space-5);
  padding: var(--space-3) var(--space-4);
  background-color: var(--color-card-alt);
  border-left: 2px solid var(--color-accent);
  border-radius: var(--radius-sm);
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.login-card__demo strong {
  display: block;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-text-subtle);
  margin-bottom: var(--space-2);
}

.login-card__demo .creds {
  font-family: var(--font-mono);
  color: var(--color-text);
}

.login-error {
  margin-top: var(--space-3);
  padding: var(--space-2) var(--space-3);
  background-color: var(--color-danger-soft);
  color: var(--color-danger);
  font-size: 0.8125rem;
  border-radius: var(--radius-sm);
  border-left: 2px solid var(--color-danger);
}