/* ============================================================================
   Kvetka Admin — Component classes (.k-icon-btn, .k-btn, .k-seg, .k-field, etc.)

   Migration complete (2026-04-29):
   - Все token-определения (`--k-*`) перенесены в /system/{primitives,semantic}.css
     или удалены как неиспользуемые.
   - Этот файл теперь содержит только class definitions для готовых компонентов
     (k-icon-btn, k-btn, k-app, k-topbar, k-tabs).
   - Component classes читают только semantic tokens через @layer cascade.

   Когда `.k-*` классы тоже будут переименованы в semantic (`.icon-button`,
   `.button`, `.field` etc.) — этот файл удалить полностью.
   ============================================================================ */

/* ============================================================================
   Reset
   ============================================================================ */
html body.k-admin {
  font-family: var(--config-font-body);
  background: var(--color-surface-base);
  color: var(--color-content-primary);
  margin: 0;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
}
body.k-admin * { box-sizing: border-box; }
body.k-admin button,
body.k-admin input,
body.k-admin textarea,
body.k-admin select { font: inherit; }

/* ============================================================================
   Primitives
   ============================================================================ */

/* Icon button — square, 40px */
.k-icon-btn {
  width: 40px; height: 40px;
  min-width: 40px;
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--color-surface-elevated);
  border: none;
  border-radius: var(--radius-md);
  color: var(--color-content-primary);
  cursor: pointer;
  text-decoration: none;
  transition: background var(--duration-fast), transform var(--duration-fast);
  padding: 0;
}
.k-icon-btn:active { transform: scale(0.94); background: var(--color-surface-overlay); }
.k-icon-btn--ghost { background: transparent; border: 1px solid var(--color-border-default); }
.k-icon-btn--accent { background: var(--color-brand-500); color: var(--color-action-primary-fg); }
.k-icon-btn--accent:active { background: var(--color-action-primary-bg-hover); }
.k-icon-btn--danger { background: transparent; color: var(--color-danger-500); }
.k-icon-btn.active { background: var(--color-brand-500); color: var(--color-action-primary-fg); }

/* Pill button */
.k-btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  min-height: var(--size-tap);
  background: var(--color-surface-elevated);
  color: var(--color-content-primary);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-md);
  font-size: var(--type-sm);
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  transition: background var(--duration-fast), border-color var(--duration-fast);
}
.k-btn:active { background: var(--color-surface-overlay); }
.k-btn--primary {
  background: var(--color-brand-500);
  color: var(--color-action-primary-fg);
  border-color: var(--color-brand-500);
  font-weight: 600;
}
.k-btn--primary:active { background: var(--color-action-primary-bg-hover); }
.k-btn--full { width: 100%; }

/* Segmented control */
.k-seg-group {
  display: flex; gap: 3px;
  background: var(--color-surface-base);
  padding: 3px;
  border-radius: var(--radius-md);
}
.k-seg {
  flex: 1;
  padding: var(--space-2) var(--space-3);
  background: transparent;
  border: none;
  color: var(--color-content-tertiary);
  font-size: var(--type-sm);
  font-weight: 500;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--duration-fast), color var(--duration-fast);
  min-height: 38px;
}
.k-seg:active { color: var(--color-content-primary); }
.k-seg.sel { background: var(--color-brand-500); color: var(--color-action-primary-fg); }

/* Field */
.k-field { display: flex; flex-direction: column; gap: var(--space-1); }
.k-field-label {
  font-size: var(--type-xs);
  color: var(--color-content-tertiary);
  font-weight: 500;
  letter-spacing: 0.4px;
  text-transform: uppercase;
}
.k-input,
.k-textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  min-height: var(--size-tap);
  background: var(--color-surface-base);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-md);
  color: var(--color-content-primary);
  font-size: var(--type-md);
  outline: none;
  transition: border-color var(--duration-fast);
}
.k-textarea { resize: vertical; line-height: 1.5; }
.k-input:focus,
.k-textarea:focus { border-color: var(--color-brand-500); }

/* Switch (iOS-style toggle) */
.k-switch { position: relative; width: 44px; height: 26px; flex-shrink: 0; cursor: pointer; }
.k-switch input { opacity: 0; width: 0; height: 0; }
.k-switch__slider {
  position: absolute; inset: 0;
  background: #2a2f36;
  border-radius: var(--radius-full);
  transition: background var(--duration-fast);
}
.k-switch__slider::before {
  content: '';
  position: absolute;
  left: 3px; top: 3px;
  width: 20px; height: 20px;
  background: white;
  border-radius: 50%;
  transition: transform var(--duration-fast);
}
.k-switch input:checked + .k-switch__slider { background: var(--color-brand-500); }
.k-switch input:checked + .k-switch__slider::before { transform: translateX(18px); }

/* Hint / helper text */
.k-hint {
  font-size: var(--type-sm);
  color: var(--color-content-tertiary);
  line-height: 1.5;
}

/* ============================================================================
   Layout primitives
   ============================================================================ */

/* App shell — full viewport, mobile-first, centered */
.k-app {
  position: fixed; inset: 0;
  max-width: var(--layout-shell-max-width);
  margin: 0 auto;
  background: var(--color-surface-base);
  display: flex;
  flex-direction: column;
}

/* Topbar */
.k-topbar {
  flex-shrink: 0;
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--space-2);
  padding: max(var(--space-3), var(--safe-area-top)) var(--space-3) var(--space-2);
  background: var(--color-surface-base);
  border-bottom: 1px solid var(--color-surface-elevated);
}

/* Bottom nav (tabs) — Instagram Edits-style compact */
.k-tabs {
  flex-shrink: 0;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 1fr;
  padding: var(--space-1) var(--space-1) calc(var(--space-1) + var(--safe-area-bottom));
  background: var(--color-surface-raised);
  border-top: 1px solid var(--color-surface-elevated);
}
.k-tab {
  display: flex; flex-direction: column; align-items: center; gap: 2px;
  padding: 8px 4px 6px;
  min-height: var(--size-tap);
  background: transparent;
  border: none;
  color: var(--color-content-tertiary);
  font-size: 10px;
  font-weight: 500;
  cursor: pointer;
  border-radius: var(--radius-md);
  transition: color var(--duration-fast), background var(--duration-fast);
}
.k-tab:active { background: var(--color-surface-elevated); }
.k-tab.sel { color: var(--color-brand-500); }
.k-tab svg { flex-shrink: 0; }

/* Sheet — slides up from bottom, sits above tabs */
.k-sheet {
  position: fixed;
  left: 0; right: 0;
  bottom: calc(var(--layout-tabs-height) + var(--safe-area-bottom));
  max-width: var(--layout-shell-max-width);
  margin: 0 auto;
  background: var(--color-surface-raised);
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  box-shadow: var(--shadow-xl);
  transform: translateY(calc(100% + var(--layout-tabs-height) + var(--safe-area-bottom)));
  transition: transform var(--duration-med) var(--ease-standard);
  max-height: 44vh;
  z-index: 50;
  display: flex;
  flex-direction: column;
}
.k-sheet.open { transform: translateY(0); }
.k-sheet__handle {
  width: 40px; height: 4px;
  background: var(--color-surface-overlay);
  border-radius: var(--radius-sm);
  margin: var(--space-2) auto var(--space-1);
  flex-shrink: 0;
}
.k-sheet__head {
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--space-2) var(--space-4) var(--space-3);
  gap: var(--space-3);
  flex-shrink: 0;
}
.k-sheet__title {
  flex: 1;
  font-size: var(--type-lg);
  font-weight: 600;
}
.k-sheet__body {
  padding: 0 var(--space-4) var(--space-5);
  display: flex; flex-direction: column;
  gap: var(--space-4);
  overflow-y: auto;
}

/* Utility */
.k-hidden,
.is-hidden { display: none !important; }
.k-row { display: flex; gap: var(--space-2); align-items: center; }

/* Placeholder states (loading / empty / error) — раньше было 3 почти одинаковых класса (.settings-loading / .fin-empty / .client-empty), унифицировано в один. */
.k-placeholder {
  color: var(--color-content-tertiary);
  text-align: center;
  padding: 40px 20px;
  font-size: 14px;
}

/* ===== Confirm dialog ===== */
.k-confirm__backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  z-index: 100;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-fast);
}
.k-confirm__backdrop.open { opacity: 1; pointer-events: auto; }
.k-confirm {
  position: fixed;
  left: 50%; top: 50%;
  transform: translate(-50%, -48%);
  width: min(420px, calc(100vw - 32px));
  background: var(--color-surface-raised);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  padding: var(--space-5);
  z-index: 101;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-fast), transform var(--duration-fast) var(--ease-standard);
}
.k-confirm.open {
  opacity: 1;
  pointer-events: auto;
  transform: translate(-50%, -50%);
}
.k-confirm__title {
  font-size: var(--type-lg);
  font-weight: 600;
  color: var(--color-content-primary);
  margin-bottom: var(--space-2);
}
.k-confirm__message {
  font-size: var(--type-sm);
  color: var(--color-content-primary);
  line-height: 1.5;
  margin-bottom: var(--space-5);
}
.k-confirm__actions {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-2);
}
.k-confirm__btn {
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: var(--type-sm);
  font-weight: 500;
  cursor: pointer;
  background: var(--color-surface-elevated);
  color: var(--color-content-primary);
  transition: background var(--duration-fast), border-color var(--duration-fast);
}
.k-confirm__btn:hover { background: var(--color-surface-overlay); }
.k-confirm__btn--ok { background: var(--color-brand-500); color: var(--color-action-primary-fg); border-color: var(--color-brand-500); }
.k-confirm__btn--ok:hover { background: var(--color-action-primary-bg-hover); }
.k-confirm--danger .k-confirm__btn--ok {
  background: #c93838;
  color: #fff;
  border-color: #c93838;
}
.k-confirm--danger .k-confirm__btn--ok:hover { background: #b22d2d; }