/* ==========================================================================
   Lexion — Components
   Button, Input, Search, Card, Modal, Toast, Empty state, Pagination,
   Save status, Alphabet index, Badge. State hover/focus/disabled/error.
   ========================================================================== */

/* ------------------------------------------------------------------ Button */
.btn {
  --btn-bg: var(--color-surface-2);
  --btn-fg: var(--color-text);
  --btn-bd: var(--color-border);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 44px;
  padding: 0 var(--space-5);
  border-radius: var(--radius-pill);
  background: var(--btn-bg);
  color: var(--btn-fg);
  border: 1px solid var(--btn-bd);
  font-size: var(--fs-sm);
  font-weight: 600;
  letter-spacing: 0.01em;
  cursor: pointer;
  white-space: nowrap;
  transition: transform var(--dur-1) var(--ease-out),
              background var(--dur-2) var(--ease-out),
              border-color var(--dur-2) var(--ease-out),
              color var(--dur-2) var(--ease-out),
              box-shadow var(--dur-2) var(--ease-out);
}

.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
}

.btn--primary {
  --btn-bg: linear-gradient(140deg, var(--color-primary), color-mix(in srgb, var(--color-primary) 72%, var(--color-secondary)));
  --btn-fg: #14161c;
  --btn-bd: transparent;
  box-shadow: var(--shadow-sm);
}
.btn--primary:hover {
  box-shadow: 0 10px 26px -14px color-mix(in srgb, var(--color-primary) 80%, transparent);
}

.btn--ghost { --btn-bg: transparent; --btn-bd: transparent; color: var(--color-muted); }
.btn--ghost:hover { --btn-bg: var(--color-surface-2); color: var(--color-text); }

.btn--danger {
  --btn-bg: var(--color-danger-soft);
  --btn-fg: var(--color-danger);
  --btn-bd: color-mix(in srgb, var(--color-danger) 38%, transparent);
}
.btn--danger:hover { --btn-bg: color-mix(in srgb, var(--color-danger) 26%, transparent); }

.btn--icon { width: 44px; padding: 0; border-radius: var(--radius-md); }
.btn--sm { min-height: 36px; padding: 0 var(--space-4); font-size: var(--fs-xs); }
.btn--block { width: 100%; }

/* Keadaan aktif untuk tombol toggle (mis. filter "Favorites"). */
.btn.is-on {
  --btn-bg: var(--color-primary-soft);
  --btn-fg: var(--color-text);
  --btn-bd: color-mix(in srgb, var(--color-primary) 42%, transparent);
}
.btn.is-on .icon { fill: currentColor; }

/* Area sentuh pada layar sentuh harus memadai (UI_SPEC §6). */
@media (max-width: 1024px) {
  .btn--sm { min-height: 44px; font-size: var(--fs-sm); }
}

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

.field__label {
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--color-muted);
}

.field__hint { font-size: var(--fs-xs); color: var(--color-muted); }

.field__error {
  display: none;
  font-size: var(--fs-xs);
  color: var(--color-danger);
}
.field.is-invalid .field__error { display: block; }
.form-message { font-size: var(--fs-sm); color: var(--color-danger); }
.field.is-invalid .input,
.field.is-invalid .select { border-color: var(--color-danger); }
.field.is-invalid .input:focus-visible,
.field.is-invalid .select:focus-visible { box-shadow: var(--ring-danger); }

.input,
.textarea,
.select {
  width: 100%;
  min-height: 44px;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  background: var(--color-surface-2);
  border: var(--border-hairline);
  transition: border-color var(--dur-2) var(--ease-out), background var(--dur-2) var(--ease-out);
}

.textarea { min-height: 132px; resize: vertical; line-height: var(--lh-base); }

.input::placeholder,
.textarea::placeholder { color: color-mix(in srgb, var(--color-muted) 80%, transparent); }

.input:hover,
.textarea:hover,
.select:hover { border-color: color-mix(in srgb, var(--color-primary) 30%, var(--color-border)); }

/* ------------------------------------------------------------------ Search */
.search {
  position: relative;
  display: flex;
  align-items: center;
}

.search .icon {
  position: absolute;
  left: var(--space-4);
  color: var(--color-muted);
  pointer-events: none;
}

.search .input { padding-left: calc(var(--space-4) * 2 + 18px); padding-right: calc(var(--space-4) + 34px); }

.search__clear {
  position: absolute;
  right: var(--space-2);
  width: 40px; height: 40px;   /* target sentuh memadai (UI_SPEC §6) */
  display: none;
  place-items: center;
  border: 0;
  border-radius: var(--radius-pill);
  background: var(--color-surface-3);
  color: var(--color-muted);
  cursor: pointer;
}
.search.has-value .search__clear { display: grid; }

/* -------------------------------------------------------------------- Card */
.card {
  display: block;
  padding: var(--space-5);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  border: var(--border-hairline);
  transition: transform var(--dur-2) var(--ease-out),
              border-color var(--dur-2) var(--ease-out),
              background var(--dur-2) var(--ease-out);
}

a.card:hover, .card--interactive:hover {
  transform: translateY(-2px);
  border-color: color-mix(in srgb, var(--color-primary) 34%, var(--color-border));
  background: color-mix(in srgb, var(--color-surface) 88%, var(--color-surface-2));
}

.card__title {
  font-family: var(--font-display);
  font-size: var(--fs-md);
  margin-bottom: var(--space-1);
}

.card__meta {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--color-muted);
}

.card__excerpt {
  color: var(--color-muted);
  font-size: var(--fs-sm);
  margin-top: var(--space-2);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card__row { display: flex; align-items: center; gap: var(--space-3); }
.card__row .btn--icon { margin-left: auto; }

/* ------------------------------------------------------------------- Badge */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px var(--space-3);
  border-radius: var(--radius-pill);
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.02em;
  background: var(--color-surface-2);
  color: var(--color-muted);
  border: 1px solid var(--color-border);
}
.badge--primary { background: var(--color-primary-soft); color: var(--color-primary); border-color: transparent; }
.badge--cyan    { background: var(--color-secondary-soft); color: var(--color-secondary); border-color: transparent; }

.dot { width: 6px; height: 6px; border-radius: var(--radius-pill); background: currentColor; }

/* ----------------------------------------------------------- Section head */
.section-head {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin: var(--space-8) 0 var(--space-4);
}
.section-head:first-child { margin-top: 0; }
.section-head h2 { font-size: var(--fs-md); }
.section-head__link {
  margin-left: auto;
  font-size: var(--fs-sm);
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  min-height: 40px;      /* target sentuh memadai (UI_SPEC §6) */
}

/* ------------------------------------------------------------ Empty state */
.empty {
  display: grid;
  place-items: center;
  gap: var(--space-3);
  padding: var(--space-12) var(--space-6);
  text-align: center;
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-lg);
  background: color-mix(in srgb, var(--color-surface) 55%, transparent);
}
.empty__icon {
  width: 52px; height: 52px;
  display: grid; place-items: center;
  border-radius: var(--radius-pill);
  background: var(--color-surface-2);
  color: var(--color-primary);
}
.empty__title { font-family: var(--font-display); font-size: var(--fs-md); }
.empty__text { color: var(--color-muted); font-size: var(--fs-sm); max-width: 42ch; }

/* ------------------------------------------------------------- Alphabet */
.alphabet {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  padding: var(--space-3);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  border: var(--border-hairline);
}

.alphabet__key {
  position: relative;
  width: 40px; height: 40px;
  display: grid; place-items: center;
  border-radius: var(--radius-sm);
  background: var(--color-surface-2);
  border: 1px solid transparent;
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  cursor: pointer;
  transition: background var(--dur-2) var(--ease-out), color var(--dur-2) var(--ease-out);
}
.alphabet__key:hover { background: var(--color-surface-3); }
.alphabet__key[aria-pressed="true"] {
  background: var(--color-primary);
  color: #14161c;
  font-weight: 700;
}
.alphabet__key:disabled {
  opacity: 0.3;
  cursor: not-allowed;
  text-decoration: line-through;
}
.alphabet__key .alphabet__n {
  position: absolute;
  top: 3px; right: 5px;
  font-size: 0.5625rem;
  color: var(--color-muted);
}

/* ------------------------------------------------------------ Pagination */
.pagination {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-top: var(--space-6);
  flex-wrap: wrap;
}
.pagination__info { font-family: var(--font-mono); font-size: var(--fs-xs); color: var(--color-muted); }
.pagination__controls { display: flex; align-items: center; gap: var(--space-2); margin-left: auto; }

.page-btn {
  min-width: 40px; height: 40px;
  padding: 0 var(--space-3);
  border-radius: var(--radius-md);
  background: var(--color-surface-2);
  border: var(--border-hairline);
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  cursor: pointer;
  transition: background var(--dur-2) var(--ease-out);
}
.page-btn:hover:not(:disabled) { background: var(--color-surface-3); }
.page-btn[aria-current="page"] {
  background: var(--color-primary);
  color: #14161c;
  border-color: transparent;
  font-weight: 700;
}
.page-btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* ---------------------------------------------------------- Save status */
.save-status {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--fs-xs);
  color: var(--color-muted);
}
.save-status[data-state="saving"] .save-status__dot { background: var(--color-warning); animation: pulse 1s infinite var(--ease-in-out); }
.save-status[data-state="saved"]  { color: var(--color-success); }
.save-status[data-state="saved"] .save-status__dot { background: var(--color-success); }
.save-status[data-state="error"]  { color: var(--color-danger); }
.save-status[data-state="error"] .save-status__dot { background: var(--color-danger); }
.save-status[data-state="unsaved"] .save-status__dot { background: var(--color-muted); }

.save-status__dot { width: 7px; height: 7px; border-radius: var(--radius-pill); background: var(--color-muted); }

@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.25; } }

/* ----------------------------------------------------------------- Modal */
.modal {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  display: none;
  place-items: center;
  padding: var(--space-4);
}
.modal.is-open { display: grid; }

.modal__scrim {
  position: absolute;
  inset: 0;
  background: rgba(6, 7, 10, 0.66);
  backdrop-filter: blur(3px);
  animation: fade var(--dur-2) var(--ease-out);
}

.modal__panel {
  position: relative;
  width: min(560px, 100%);
  max-height: min(88dvh, 720px);
  overflow-y: auto;
  padding: var(--space-6);
  border-radius: var(--radius-xl);
  background: var(--color-surface);
  border: var(--border-hairline);
  box-shadow: var(--shadow-lg);
  animation: pop var(--dur-3) var(--ease-out);
}
.modal__panel--sm { width: min(440px, 100%); }

.modal__head { display: flex; align-items: flex-start; gap: var(--space-3); margin-bottom: var(--space-5); }
.modal__title { font-family: var(--font-display); font-size: var(--fs-md); }
.modal__sub { font-size: var(--fs-sm); color: var(--color-muted); margin-top: var(--space-1); }
.modal__close { margin-left: auto; }

.modal__body { display: grid; gap: var(--space-4); }
.modal__foot { display: flex; justify-content: flex-end; gap: var(--space-3); margin-top: var(--space-6); }

@keyframes fade { from { opacity: 0; } to { opacity: 1; } }
@keyframes pop  { from { opacity: 0; transform: translateY(12px) scale(0.98); } to { opacity: 1; transform: none; } }

/* ----------------------------------------------------------------- Toast */
.toast-stack {
  position: fixed;
  bottom: calc(var(--bottomnav-h) + var(--space-4) + env(safe-area-inset-bottom, 0px));
  left: 50%;
  transform: translateX(-50%);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  width: min(420px, calc(100vw - var(--space-8)));
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  background: var(--color-surface-2);
  border: var(--border-hairline);
  box-shadow: var(--shadow-md);
  font-size: var(--fs-sm);
  pointer-events: auto;
  animation: toast-in var(--dur-3) var(--ease-out);
}
.toast--success { border-color: color-mix(in srgb, var(--color-success) 40%, var(--color-border)); }
.toast--error   { border-color: color-mix(in srgb, var(--color-danger) 45%, var(--color-border)); }
.toast--success .toast__icon { color: var(--color-success); }
.toast--error   .toast__icon { color: var(--color-danger); }
.toast.is-leaving { animation: toast-out var(--dur-2) var(--ease-out) forwards; }

@keyframes toast-in  { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }
@keyframes toast-out { to { opacity: 0; transform: translateY(10px); } }

@media (min-width: 1025px) {
  .toast-stack { bottom: var(--space-6); left: auto; right: var(--space-6); transform: none; }
}

/* ------------------------------------------------------------- Toolbar */
.toolbar {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-bottom: var(--space-5);
}
.toolbar .search { flex: 1 1 260px; }
.toolbar .select {
  min-height: 44px;
  padding: 0 var(--space-4);
  border-radius: var(--radius-md);
  background: var(--color-surface-2);
  border: var(--border-hairline);
}

/* ------------------------------------------------------------------ Skeletons */
.skeleton {
  border-radius: var(--radius-md);
  background: linear-gradient(90deg, var(--color-surface-2) 25%, var(--color-surface-3) 37%, var(--color-surface-2) 63%);
  background-size: 400% 100%;
  animation: shimmer 1.4s ease infinite;
}
@keyframes shimmer { from { background-position: 100% 0; } to { background-position: 0 0; } }

/* -------------------------------------------------------------- Icon svg */
.icon { width: 20px; height: 20px; stroke: currentColor; stroke-width: 1.6; fill: none; stroke-linecap: round; stroke-linejoin: round; }
.icon--sm { width: 16px; height: 16px; }

/* Import JSON: aksi alternatif di atas, Merge sebagai aksi utama terpisah. */
.modal__foot:has(.backup-import-actions) {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-3);
}
.backup-import-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  width: 100%;
}
.backup-import-actions > .btn { min-width: 0; }
.backup-import-merge {
  width: 100%;
  display: flex;
  justify-content: center;
}
.backup-import-merge .btn {
  width: min(100%, 100%);
  min-height: 46px;
  justify-content: center;
  animation: backup-merge-enter 420ms var(--ease-out) both;
}
@keyframes backup-merge-enter {
  from { opacity: 0; transform: translateX(28px); }
  to { opacity: 1; transform: translateX(0); }
}
@media (max-width: 380px) {
  .backup-import-actions { gap: var(--space-2); }
  .backup-import-actions > .btn { flex: 1 1 0; padding-inline: var(--space-2); }
}
@media (prefers-reduced-motion: reduce) {
  .backup-import-merge .btn { animation: none; }
}