/* ============================================================
   DESIGN COMPONENTS — Reusable UI Patterns
   Canonical .tk-* prefix. Requires: design-tokens.css
   Card, Accordion, Modal, Badge — shared across v2 pages.
   ============================================================ */

/* ── Card ─────────────────────────────────────────── */

.tk-card {
  background: var(--tk-white);
  border-radius: var(--tk-r-lg);
  box-shadow: var(--tk-sh-card);
  border: 1px solid var(--tk-border-light);
  transition: box-shadow var(--tk-duration-normal) var(--tk-ease-default),
              transform var(--tk-duration-normal) var(--tk-ease-default);
}

.tk-card--padded {
  padding: var(--tk-space-xl) var(--tk-space-lg);
}

.tk-card--compact {
  padding: var(--tk-space-lg) var(--tk-space-md);
}

@media (hover: hover) {
  .tk-card--hover:hover {
    box-shadow: var(--tk-sh-lifted);
    transform: translateY(-2px);
  }
}

.tk-card--sticky {
  position: sticky;
  top: var(--tk-space-lg);
}

.tk-card__title {
  font-family: var(--tk-ff-display);
  font-size: var(--tk-fs-h4);
  color: var(--tk-indigo);
  margin: 0 0 var(--tk-space-sm);
  line-height: 1.3;
}

.tk-card__subtitle {
  font-size: var(--tk-fs-small);
  color: var(--tk-text-quiet);
  margin: 0 0 var(--tk-space-lg);
}

/* ── Accordion (native <details>/<summary>) ───────── */

.tk-accordion {
  border-bottom: 1px solid var(--tk-border-light);
}

.tk-accordion:last-child {
  border-bottom: none;
}

.tk-accordion__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--tk-space-md) var(--tk-space-sm);
  cursor: pointer;
  list-style: none;
  font-size: var(--tk-fs-small);
  font-weight: 500;
  color: var(--tk-text);
  border-radius: var(--tk-r-sm);
  transition: background var(--tk-duration-fast) var(--tk-ease-default);
  min-height: 44px;
}

.tk-accordion__trigger::-webkit-details-marker {
  display: none;
}

.tk-accordion__trigger::marker {
  content: '';
}

.tk-accordion__trigger:hover {
  background: var(--tk-surface);
}

/* Chevron */
.tk-accordion__trigger::after {
  content: '';
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--tk-text-quiet);
  border-bottom: 2px solid var(--tk-text-quiet);
  transform: rotate(45deg);
  transition: transform var(--tk-duration-fast) var(--tk-ease-default);
  flex-shrink: 0;
  margin-left: var(--tk-space-sm);
}

.tk-accordion[open] > .tk-accordion__trigger::after {
  transform: rotate(-135deg);
}

/* Alternating row tint */
.tk-accordion:nth-child(even) > .tk-accordion__trigger {
  background: rgba(0, 0, 0, 0.015);
}

.tk-accordion__body {
  padding: 0 var(--tk-space-sm) var(--tk-space-lg);
  font-size: var(--tk-fs-small);
  color: var(--tk-text-quiet);
  line-height: 1.6;
  max-width: 600px;
}

/* Category label within accordion list */
.tk-accordion__category {
  font-family: var(--tk-ff-display);
  font-size: var(--tk-fs-h4);
  font-weight: 700;
  color: var(--tk-indigo);
  padding: var(--tk-space-lg) var(--tk-space-sm) var(--tk-space-sm);
  border-bottom: 1px solid var(--tk-border-light);
}

/* ── Modal ────────────────────────────────────────── */

.tk-modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: var(--tk-z-modal);
  display: flex;
  align-items: center;
  justify-content: center;
}

.tk-modal[hidden] {
  display: none;
}

.tk-modal__content {
  background: var(--tk-white);
  border-radius: var(--tk-r-lg);
  box-shadow: var(--tk-sh-dramatic);
  padding: var(--tk-space-xl);
  max-width: 400px;
  width: 90%;
  text-align: center;
  position: relative;
}

.tk-modal__close {
  position: absolute;
  top: var(--tk-space-sm);
  right: var(--tk-space-sm);
  background: none;
  border: none;
  font-size: var(--tk-fs-h3);
  cursor: pointer;
  color: var(--tk-text-quiet);
  min-width: 44px;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--tk-r-sm);
  transition: color var(--tk-duration-fast);
}

.tk-modal__close:hover {
  color: var(--tk-text);
}

.tk-modal__close:focus-visible {
  outline: 2px solid var(--tk-saffron);
  outline-offset: 2px;
}

.tk-modal__title {
  font-family: var(--tk-ff-display);
  font-size: var(--tk-fs-h3);
  color: var(--tk-indigo);
  margin: 0 0 var(--tk-space-md);
}

.tk-modal__message {
  margin: 0 0 var(--tk-space-lg);
  font-size: var(--tk-fs-body);
  color: var(--tk-text);
  line-height: 1.6;
}

/* ── Badge ────────────────────────────────────────── */

.tk-badge {
  display: inline-flex;
  align-items: center;
  font-family: var(--tk-ff-body);
  font-size: var(--tk-fs-tiny);
  font-weight: 600;
  letter-spacing: var(--tk-tracking-caps);
  text-transform: uppercase;
  padding: 4px 12px;
  border-radius: var(--tk-r-pill);
  line-height: 1.4;
}

.tk-badge--saffron {
  background: var(--tk-saffron-warm-10);
  color: var(--tk-saffron-warm-dark);
}

.tk-badge--violet {
  background: var(--tk-violet-15);
  color: var(--tk-violet);
}

.tk-badge--emerald {
  background: var(--tk-emerald-pale);
  color: var(--tk-emerald);
}

.tk-badge--neutral {
  background: var(--tk-surface);
  color: var(--tk-text-mid);
}

.tk-badge--sm {
  font-size: 10px;
  padding: 2px 8px;
}

/* ── Responsive ───────────────────────────────────── */

@media (max-width: 640px) {
  .tk-card--padded {
    padding: var(--tk-space-lg) var(--tk-space-md);
  }

  .tk-modal__content {
    padding: var(--tk-space-lg);
    max-width: 95%;
  }
}

/* ── Reduced Motion ───────────────────────────────── */

@media (prefers-reduced-motion: reduce) {
  .tk-card--hover,
  .tk-accordion__trigger,
  .tk-modal__close {
    transition: none;
  }

  .tk-accordion__trigger::after {
    transition: none;
  }
}