/**
 * components.css
 * ----------------------------------------------------------------------------
 * Visual styles for every reusable UI widget. Each component here has a
 * matching JS factory in /components (e.g. .btn <-> components/button.js).
 * The JS creates the DOM structure and behavior; this file is the only
 * place that decides what it looks like. A future feature module should
 * never write its own one-off button or card style — it composes these.
 */

/* ---- Buttons --------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-md);
  border: var(--border-width) solid transparent;
  transition: background-color var(--duration-fast) var(--ease-standard),
    border-color var(--duration-fast) var(--ease-standard),
    transform var(--duration-fast) var(--ease-standard);
  white-space: nowrap;
}
.btn:active {
  transform: translateY(1px);
}
.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn--primary {
  background: var(--color-primary);
  color: var(--color-primary-ink);
}
.btn--primary:hover:not(:disabled) {
  background: var(--color-primary-strong);
}

.btn--secondary {
  background: var(--color-surface-alt);
  color: var(--color-ink);
  border-color: var(--color-border);
}
.btn--secondary:hover:not(:disabled) {
  border-color: var(--color-border-strong);
}

.btn--ghost {
  background: transparent;
  color: var(--color-ink-muted);
}
.btn--ghost:hover:not(:disabled) {
  background: var(--color-scrim);
  color: var(--color-ink);
}

.btn--danger {
  background: var(--color-danger);
  color: #fff;
}

.btn--icon {
  padding: var(--space-2);
  border-radius: var(--radius-pill);
}

/* ---- Card -------------------------------------------------------------------- */
.card {
  background: var(--color-surface);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  box-shadow: var(--shadow-sm);
}

.card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-4);
}

.card__title {
  font-family: var(--font-display);
  font-size: var(--text-md);
  font-weight: 700;
  margin: 0;
}

/* ---- Badge --------------------------------------------------------------------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 2px var(--space-2);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  border-radius: var(--radius-pill);
  background: var(--color-surface-alt);
  color: var(--color-ink-muted);
}
.badge--success {
  background: color-mix(in srgb, var(--color-success) 16%, transparent);
  color: var(--color-success);
}
.badge--warning {
  background: color-mix(in srgb, var(--color-warning) 16%, transparent);
  color: var(--color-warning);
}
.badge--danger {
  background: color-mix(in srgb, var(--color-danger) 16%, transparent);
  color: var(--color-danger);
}
.badge--info {
  background: color-mix(in srgb, var(--color-primary) 14%, transparent);
  color: var(--color-primary);
}

/* ---- Table ------------------------------------------------------------------------ */
.table-wrap {
  overflow-x: auto;
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-md);
}
.table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}
.table th,
.table td {
  text-align: left;
  padding: var(--space-3) var(--space-4);
  border-bottom: var(--border-width) solid var(--color-border);
  white-space: nowrap;
}
.table th {
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--color-ink-muted);
  background: var(--color-surface-alt);
}
.table tbody tr:last-child td {
  border-bottom: none;
}
.table tbody tr:hover {
  background: var(--color-scrim);
}

/* ---- Input / form field ------------------------------------------------------------- */
.field {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.field__label {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-ink-muted);
}
.input {
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  border: var(--border-width) solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-ink);
  transition: border-color var(--duration-fast) var(--ease-standard);
}
.input:hover {
  border-color: var(--color-border-strong);
}
.input:focus-visible {
  border-color: var(--color-primary);
}
.input::placeholder {
  color: var(--color-ink-faint);
}

.search-field {
  position: relative;
  display: flex;
  align-items: center;
}
.search-field .input {
  width: 100%;
  padding-left: var(--space-7);
}
.search-field__icon {
  position: absolute;
  left: var(--space-3);
  width: 16px;
  height: 16px;
  color: var(--color-ink-faint);
  pointer-events: none;
}

/* ---- Dialog / modal -------------------------------------------------------------------- */
.dialog-overlay {
  position: fixed;
  inset: 0;
  background: var(--color-overlay);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-dialog);
  padding: var(--space-4);
}
.dialog {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: min(480px, 100%);
  max-height: 85vh;
  overflow-y: auto;
  padding: var(--space-5);
}
.dialog__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-4);
}
.dialog__footer {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-3);
  margin-top: var(--space-5);
}

/* ---- Toast notifications ------------------------------------------------------------------- */
.toast-region {
  position: fixed;
  bottom: var(--space-5);
  right: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  z-index: var(--z-toast);
  max-width: 360px;
}
.toast {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  background: var(--color-ink);
  color: var(--color-bg);
  box-shadow: var(--shadow-md);
  font-size: var(--text-sm);
  animation: toast-in var(--duration-base) var(--ease-standard);
}
.toast--success {
  border-left: 3px solid var(--color-success);
}
.toast--warning {
  border-left: 3px solid var(--color-warning);
}
.toast--danger {
  border-left: 3px solid var(--color-danger);
}
@keyframes toast-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---- Loading spinner ------------------------------------------------------------------------ */
.spinner {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-primary);
  animation: spin 700ms linear infinite;
}
@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* ---- Empty state ---------------------------------------------------------------------------- */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-3);
  padding: var(--space-8) var(--space-5);
  color: var(--color-ink-muted);
}
.empty-state__icon {
  width: 40px;
  height: 40px;
  color: var(--color-ink-faint);
}
.empty-state__title {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--color-ink);
}

/* ---- Sidebar nav item ------------------------------------------------------------------------ */
.nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  color: var(--color-ink-muted);
  font-size: var(--text-sm);
  font-weight: 600;
}
.nav-item:hover {
  background: var(--color-scrim);
  color: var(--color-ink);
  text-decoration: none;
}
.nav-item[aria-current='page'] {
  background: color-mix(in srgb, var(--color-primary) 12%, transparent);
  color: var(--color-primary);
}
.nav-item__icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}
.nav-item__label {
  overflow: hidden;
  text-overflow: ellipsis;
}
.app-shell[data-sidebar='collapsed'] .nav-item__label {
  display: none;
}

/* ---- Theme toggle ------------------------------------------------------------------------------ */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-pill);
  color: var(--color-ink-muted);
}
.theme-toggle:hover {
  background: var(--color-scrim);
  color: var(--color-ink);
}
.theme-toggle svg {
  width: 18px;
  height: 18px;
}