/* ============================================================
   Daily Calculator — cards.css
   Calculator cards, category cards, guide cards, badges
   ============================================================ */

/* ---------- Calculator card ---------- */
.calc-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-4);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  color: var(--color-text);
  text-decoration: none;
  transition: border-color var(--transition-fast),
              box-shadow var(--transition-fast),
              transform var(--transition-fast);
  height: 100%;
}

.calc-card:hover,
.calc-card:focus-visible {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  text-decoration: none;
  outline: none;
}

.calc-card:focus-visible {
  outline: var(--focus-outline);
  outline-offset: 2px;
}

.calc-card__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: var(--color-primary-light);
  color: var(--color-primary);
  flex-shrink: 0;
}

.calc-card__icon svg {
  width: 22px;
  height: 22px;
}

.calc-card__title {
  font-size: var(--fs-base);
  font-weight: var(--fw-semibold);
  line-height: var(--lh-snug);
  color: var(--color-text);
  margin: 0;
}

.calc-card__desc {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  line-height: var(--lh-snug);
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.calc-card__footer {
  margin-top: auto;
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--fs-xs);
  color: var(--color-primary);
  font-weight: var(--fw-medium);
}

.calc-card__footer svg {
  width: 12px;
  height: 12px;
  transition: transform var(--transition-fast);
}

.calc-card:hover .calc-card__footer svg {
  transform: translateX(3px);
}

/* ---------- Compact link chip ---------- */
.calc-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  background: var(--color-bg-subtle);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--fs-sm);
  color: var(--color-text);
  text-decoration: none;
  transition: background-color var(--transition-fast),
              border-color var(--transition-fast),
              color var(--transition-fast);
  min-height: 36px;
}

.calc-chip:hover,
.calc-chip:focus-visible {
  background: var(--color-primary-light);
  border-color: var(--color-primary);
  color: var(--color-primary-dark);
  text-decoration: none;
  outline: none;
}

.calc-chip:focus-visible {
  outline: var(--focus-outline);
  outline-offset: 2px;
}

/* ---------- Category card ---------- */
.category-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-5);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: var(--color-text);
  transition: border-color var(--transition-fast),
              box-shadow var(--transition-fast),
              transform var(--transition-fast);
  height: 100%;
}

.category-card:hover,
.category-card:focus-visible {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  text-decoration: none;
}

.category-card:focus-visible {
  outline: var(--focus-outline);
  outline-offset: 2px;
}

.category-card__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: var(--color-white);
  flex-shrink: 0;
}

.category-card__icon svg {
  width: 26px;
  height: 26px;
}

.category-card__title {
  font-size: var(--fs-lg);
  font-weight: var(--fw-bold);
  color: var(--color-text);
  margin: 0;
}

.category-card__desc {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  line-height: var(--lh-base);
  margin: 0;
}

.category-card__meta {
  margin-top: auto;
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
}

/* ---------- Guide card ---------- */
.guide-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-5);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: var(--color-text);
  transition: border-color var(--transition-fast),
              box-shadow var(--transition-fast),
              transform var(--transition-fast);
  height: 100%;
}

.guide-card:hover,
.guide-card:focus-visible {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  text-decoration: none;
}

.guide-card:focus-visible {
  outline: var(--focus-outline);
  outline-offset: 2px;
}

.guide-card__tag {
  display: inline-flex;
  align-self: flex-start;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
}

.guide-card__title {
  font-size: var(--fs-base);
  font-weight: var(--fw-semibold);
  line-height: var(--lh-snug);
  margin: 0;
  color: var(--color-text);
}

.guide-card__desc {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  line-height: var(--lh-base);
  margin: 0;
}

.guide-card__read {
  margin-top: auto;
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
}

.guide-card__read svg {
  width: 12px;
  height: 12px;
}

/* ---------- Badges ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 2px 10px;
  border-radius: var(--radius-full);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  line-height: 1.6;
  background: var(--color-bg-subtle);
  color: var(--color-text-muted);
}

.badge--primary {
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
}

.badge--success {
  background: var(--color-success-bg);
  color: var(--color-success);
}

/* ---------- Popular list ---------- */
.popular-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  justify-content: center;
}

/* ---------- Recently used strip ---------- */
.recent-strip {
  display: flex;
  gap: var(--space-3);
  overflow-x: auto;
  padding-bottom: var(--space-2);
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.recent-strip::-webkit-scrollbar { height: 6px; }
.recent-strip::-webkit-scrollbar-thumb {
  background: var(--color-border-strong);
  border-radius: 3px;
}

.recent-strip > * {
  flex: 0 0 auto;
  scroll-snap-align: start;
  min-width: 220px;
  max-width: 260px;
}

/* ---------- Empty-state card ---------- */
.empty-card {
  text-align: center;
  padding: var(--space-8) var(--space-4);
  border: 1px dashed var(--color-border-strong);
  border-radius: var(--radius-lg);
  color: var(--color-text-muted);
  font-size: var(--fs-sm);
  background: var(--color-bg-subtle);
}

.empty-card strong {
  display: block;
  color: var(--color-text);
  font-size: var(--fs-base);
  margin-bottom: var(--space-1);
}