/* ==========================================================================
   Reusable components
   ========================================================================== */

/* ---------- Buttons --------------------------------------------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 40px;
  padding: 0 16px;
  border-radius: var(--radius-md);
  font-family: var(--ff-body);
  font-weight: 600;
  font-size: var(--fs-base);
  background: var(--color-surface);
  color: var(--color-fg);
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: background var(--dur-fast) var(--ease-out),
              transform var(--dur-fast) var(--ease-out),
              border-color var(--dur-fast) var(--ease-out),
              box-shadow var(--dur-fast) var(--ease-out);
  white-space: nowrap;
}
.btn:hover { background: var(--color-surface-muted); }
.btn:active { transform: translateY(1px); }

.btn--primary {
  background: var(--color-primary);
  color: var(--color-on-primary);
  border-color: var(--color-primary);
}
.btn--primary:hover { background: var(--color-primary-hover); border-color: var(--color-primary-hover); }

.btn--accent {
  background: var(--color-accent);
  color: var(--color-on-accent);
  border-color: var(--color-accent);
}

.btn--ghost {
  background: transparent;
  border-color: transparent;
}
.btn--ghost:hover { background: var(--color-primary-soft); color: var(--color-primary); }

.btn--danger {
  background: var(--color-surface);
  color: var(--color-destructive);
  border-color: color-mix(in oklab, var(--color-destructive) 40%, var(--color-border));
}
.btn--danger:hover { background: color-mix(in oklab, var(--color-destructive) 8%, transparent); }

.btn--sm { height: 32px; padding: 0 12px; font-size: var(--fs-sm); border-radius: 8px; }
.btn--lg { height: 48px; padding: 0 22px; font-size: var(--fs-md); }
.btn--icon { width: 40px; padding: 0; }
.btn--icon.btn--sm { width: 32px; }
.btn--block { width: 100%; }

.btn[disabled] { opacity: 0.5; cursor: not-allowed; }

/* ---------- Cards ----------------------------------------------------- */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--density-card-pad);
  box-shadow: var(--shadow-sm);
}
.card--hover {
  cursor: pointer;
  transition: transform var(--dur-fast) var(--ease-out),
              box-shadow var(--dur-fast) var(--ease-out),
              border-color var(--dur-fast) var(--ease-out);
}
.card--hover:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-border-strong);
}
.card--flat { box-shadow: none; }
.card--muted { background: var(--color-surface-muted); border-color: transparent; }

/* ---------- Form fields ---------------------------------------------- */
.field { display: flex; flex-direction: column; gap: 6px; }
.field__label { font-weight: 600; font-size: var(--fs-sm); color: var(--color-fg); }
.field__hint { font-size: var(--fs-sm); color: var(--color-fg-muted); }
.field__error { font-size: var(--fs-sm); color: var(--color-destructive); }
.input, .textarea, .select {
  min-height: 44px;
  padding: 10px 14px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-family: var(--ff-body);
  font-size: var(--fs-base);
  color: var(--color-fg);
  transition: border-color var(--dur-fast) var(--ease-out), box-shadow var(--dur-fast) var(--ease-out);
  width: 100%;
}
.input:hover, .textarea:hover, .select:hover { border-color: color-mix(in oklab, var(--color-primary) 40%, var(--color-border)); }
.input:focus, .textarea:focus, .select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-ring);
}
.textarea { min-height: 110px; padding: 12px 14px; resize: vertical; line-height: var(--lh-base); }
.input--search {
  padding-left: 42px;
  background: var(--color-surface-muted);
  border-color: transparent;
}

.search-wrap { position: relative; width: 100%; }
.search-wrap .icon-leading {
  position: absolute; left: 12px; top: 50%; transform: translateY(-50%);
  color: var(--color-fg-muted); pointer-events: none;
}

/* ---------- Badges ---------------------------------------------------- */
.badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 2px 10px;
  border-radius: var(--radius-pill);
  font-size: var(--fs-xs);
  font-weight: 600;
  background: var(--color-surface-muted);
  color: var(--color-fg);
  border: 1px solid var(--color-border);
  line-height: 1.5;
  white-space: nowrap;
}
.badge--primary { background: var(--color-primary-soft); color: var(--color-primary); border-color: transparent; }
.badge--accent  { background: var(--color-accent-soft); color: color-mix(in oklab, var(--color-accent) 70%, black); border-color: transparent; }
.badge--success { background: color-mix(in oklab, var(--color-success) 14%, transparent); color: var(--color-success); border-color: transparent; }
.badge--warning { background: color-mix(in oklab, var(--color-warning) 14%, transparent); color: var(--color-warning); border-color: transparent; }
.badge--danger  { background: color-mix(in oklab, var(--color-destructive) 14%, transparent); color: var(--color-destructive); border-color: transparent; }
.badge--outline { background: transparent; }
.badge--dot::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: currentColor; display: inline-block; }

/* ---------- Avatar / circle chip ------------------------------------- */
.avatar {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--color-surface-muted);
  color: var(--color-fg);
  display: inline-flex; align-items: center; justify-content: center;
  font-weight: 600;
  font-size: var(--fs-sm);
  flex-shrink: 0;
  border: 1px solid var(--color-border);
  overflow: hidden;
}
.avatar--sm { width: 28px; height: 28px; font-size: 11px; }
.avatar--lg { width: 56px; height: 56px; font-size: var(--fs-md); }
.avatar--xl { width: 88px; height: 88px; font-size: var(--fs-xl); }

.avatar-stack { display: inline-flex; }
.avatar-stack .avatar + .avatar { margin-left: -10px; box-shadow: 0 0 0 2px var(--color-surface); }

/* ---------- Circle chip ---------------------------------------------- */
.circle-chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 3px 10px 3px 6px;
  border-radius: var(--radius-pill);
  background: var(--color-surface-muted);
  font-size: var(--fs-xs);
  font-weight: 600;
}
.circle-chip__dot { width: 10px; height: 10px; border-radius: 50%; background: var(--circle-color, var(--color-primary)); }

/* ---------- Alert / callout ----------------------------------------- */
.callout {
  display: flex; gap: 12px;
  padding: 14px 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-surface-warm);
}
.callout--info    { background: var(--color-primary-soft); border-color: transparent; }
.callout--accent  { background: var(--color-accent-soft); border-color: transparent; }
.callout--warning { background: color-mix(in oklab, var(--color-warning) 10%, transparent); border-color: transparent; }
.callout--danger  { background: color-mix(in oklab, var(--color-destructive) 8%, transparent); border-color: transparent; }
.callout__icon { flex-shrink: 0; color: var(--color-fg-muted); margin-top: 2px; }
.callout__body { font-size: var(--fs-sm); color: var(--color-fg); }
.callout__body strong { display: block; margin-bottom: 2px; font-weight: 600; }

/* ---------- Toggle / switch ----------------------------------------- */
.toggle {
  width: 38px; height: 22px; border-radius: 999px;
  background: var(--color-border);
  position: relative;
  cursor: pointer;
  transition: background var(--dur-fast) var(--ease-out);
  flex-shrink: 0;
  border: none;
}
.toggle::after {
  content: ""; position: absolute; top: 2px; left: 2px;
  width: 18px; height: 18px; border-radius: 50%;
  background: #fff;
  transition: transform var(--dur-fast) var(--ease-out);
  box-shadow: 0 1px 2px rgba(0,0,0,0.15);
}
.toggle[aria-checked="true"] { background: var(--color-primary); }
.toggle[aria-checked="true"]::after { transform: translateX(16px); }

/* ---------- Segmented control --------------------------------------- */
.segmented {
  display: inline-flex;
  background: var(--color-surface-muted);
  padding: 3px;
  border-radius: var(--radius-md);
  gap: 2px;
}
.segmented__option {
  padding: 6px 12px;
  font-size: var(--fs-sm);
  font-weight: 600;
  border-radius: 7px;
  color: var(--color-fg-muted);
  display: inline-flex; align-items: center; gap: 6px;
}
.segmented__option[aria-pressed="true"] { background: var(--color-surface); color: var(--color-fg); box-shadow: var(--shadow-sm); }

/* ---------- Tabs ------------------------------------------------------ */
.tabs {
  display: flex; gap: 4px;
  border-bottom: 1px solid var(--color-border);
}
.tab {
  padding: 10px 14px;
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--color-fg-muted);
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  display: inline-flex; align-items: center; gap: 8px;
}
.tab:hover { color: var(--color-fg); }
.tab[aria-selected="true"] {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

/* ---------- Empty state --------------------------------------------- */
.empty {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 12px; padding: 48px 24px;
  text-align: center;
  color: var(--color-fg-muted);
}
.empty__icon { width: 48px; height: 48px; color: var(--color-fg-soft); }
.empty h3 { color: var(--color-fg); }

/* ---------- Divider --------------------------------------------------- */
.divider { height: 1px; background: var(--color-border); border: none; margin: var(--space-6) 0; }
.divider--vert { width: 1px; height: 100%; background: var(--color-border); }

/* ---------- Icon -------------------------------------------------------- */
.icon { width: 1.1em; height: 1.1em; stroke: currentColor; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; flex-shrink: 0; }
.icon--sm { width: 14px; height: 14px; }
.icon--md { width: 18px; height: 18px; }
.icon--lg { width: 24px; height: 24px; }
.icon--xl { width: 32px; height: 32px; }

/* ---------- Modal ------------------------------------------------------- */
.modal-backdrop {
  position: fixed; inset: 0;
  background: color-mix(in oklab, var(--color-fg) 35%, transparent);
  z-index: 90;
  display: flex; align-items: center; justify-content: center;
  padding: 24px;
  animation: fade-in var(--dur-base) var(--ease-out);
}
.modal {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  max-width: 560px;
  width: 100%;
  max-height: 90vh;
  overflow: auto;
  animation: pop-in var(--dur-base) var(--ease-out);
}
.modal__head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--color-border);
}
.modal__body { padding: 22px 24px; }
.modal__foot {
  display: flex; gap: 10px; justify-content: flex-end;
  padding: 16px 24px;
  border-top: 1px solid var(--color-border);
  background: var(--color-surface-warm);
  border-radius: 0 0 var(--radius-xl) var(--radius-xl);
}

@keyframes fade-in { from { opacity: 0; } to { opacity: 1; } }
@keyframes pop-in { from { opacity: 0; transform: translateY(8px) scale(0.98); } to { opacity: 1; transform: none; } }

/* ---------- Step indicator ------------------------------------------- */
.steps { display: flex; gap: 0; align-items: center; }
.step { display: flex; align-items: center; gap: 8px; flex: 1; }
.step__bullet {
  width: 26px; height: 26px;
  border-radius: 50%;
  background: var(--color-surface-muted);
  color: var(--color-fg-muted);
  display: inline-flex; align-items: center; justify-content: center;
  font-size: var(--fs-xs); font-weight: 700;
  border: 1px solid var(--color-border);
  flex-shrink: 0;
}
.step__label { font-size: var(--fs-sm); color: var(--color-fg-muted); font-weight: 500; }
.step__line { flex: 1; height: 2px; background: var(--color-border); margin: 0 8px; border-radius: 1px; }

.step--done .step__bullet { background: var(--color-primary); color: var(--color-on-primary); border-color: var(--color-primary); }
.step--done .step__label { color: var(--color-fg); }
.step--done + .step .step__line { background: var(--color-primary); }
.step--active .step__bullet { background: var(--color-surface); color: var(--color-primary); border-color: var(--color-primary); border-width: 2px; }
.step--active .step__label { color: var(--color-primary); font-weight: 600; }