/* ==========================================================================
   cards.css — card surfaces used for navigation, topics, guides and products
   ========================================================================== */

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-2xs);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-l);
  padding: var(--space-l);
  text-decoration: none;
  color: inherit;
  transition: border-color var(--duration-base) var(--ease-out),
    transform var(--duration-base) var(--ease-out),
    box-shadow var(--duration-base) var(--ease-out);
}

a.card:hover {
  border-color: var(--color-accent);
  transform: translateY(-3px);
  box-shadow: var(--shadow-m);
}

.card__eyebrow {
  font-family: var(--font-heading);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: var(--ls-eyebrow);
  text-transform: uppercase;
  color: var(--color-accent);
}

.card__title {
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: var(--ls-heading);
}

.card__text {
  font-size: 15px;
  line-height: 1.6;
  color: var(--color-secondary);
}

.card__meta {
  margin-top: auto;
  padding-top: var(--space-m);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-s);
  font-size: 13px;
  color: var(--color-secondary);
}

.card__arrow {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  display: grid;
  place-items: center;
  color: var(--color-accent-dark);
  transition: background var(--duration-base) var(--ease-out),
    border-color var(--duration-base) var(--ease-out),
    color var(--duration-base) var(--ease-out);
}

.card__arrow svg {
  width: 13px;
}

a.card:hover .card__arrow {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-ink-invert);
}

/* Variants --------------------------------------------------------------- */

.card--flat {
  background: transparent;
  border: 0;
  border-top: 2px solid var(--color-text);
  border-radius: 0;
  padding: var(--space-m) 0 0;
}

a.card--flat:hover {
  transform: none;
  box-shadow: none;
  border-top-color: var(--color-accent);
}

.card--alt {
  background: var(--color-surface-alt);
  border-color: transparent;
}

.card--accent {
  background: var(--color-accent);
  color: var(--color-ink-invert);
  border-color: transparent;
}

.card--accent .card__eyebrow {
  color: var(--color-highlight);
}

.card--accent .card__text,
.card--accent .card__meta {
  color: rgba(245, 245, 240, 0.76);
}

.card--accent .card__arrow {
  border-color: rgba(245, 245, 240, 0.3);
  color: var(--color-ink-invert);
}

.card--highlight {
  background: var(--color-highlight);
  border-color: transparent;
}

.card--compact {
  padding: var(--space-m);
  gap: 6px;
}

.card--compact .card__title {
  font-size: 18px;
}

.card--compact .card__text {
  font-size: 14px;
}

.card--wide {
  flex-direction: row;
  align-items: center;
  gap: var(--space-l);
}

.card--wide .card__body {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

/* Card index (numbered rows) --------------------------------------------- */

.card-index {
  border-top: 1px solid var(--color-border);
}

.card-index__row {
  display: grid;
  grid-template-columns: 56px minmax(0, 1.1fr) minmax(0, 1.4fr) 40px;
  gap: var(--space-m);
  align-items: center;
  padding: var(--space-m) 0;
  border-bottom: 1px solid var(--color-border);
  text-decoration: none;
  color: inherit;
  transition: background var(--duration-fast) var(--ease-out),
    padding-inline var(--duration-base) var(--ease-out);
}

.card-index__row:hover {
  background: var(--color-surface);
  padding-inline: var(--space-s);
}

.card-index__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-secondary);
}

.card-index__title {
  font-family: var(--font-heading);
  font-size: 21px;
  font-weight: 700;
  letter-spacing: var(--ls-heading);
  line-height: 1.2;
}

.card-index__text {
  font-size: 14.5px;
  color: var(--color-secondary);
  line-height: 1.55;
}

/* Card illustration (payment card mockup) -------------------------------- */

.card-visual {
  aspect-ratio: 1.586 / 1;
  border-radius: var(--radius-m);
  padding: var(--space-m);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  color: var(--color-ink-invert);
  background: linear-gradient(135deg, var(--color-accent-dark), var(--color-accent));
  box-shadow: var(--shadow-m);
  position: relative;
  overflow: hidden;
  max-width: 380px;
}

.card-visual::after {
  content: "";
  position: absolute;
  inset: auto -30% -60% auto;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(217, 242, 200, 0.22), transparent 68%);
}

.card-visual--light {
  background: linear-gradient(135deg, #ffffff, var(--color-surface-alt));
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.card-visual--dark {
  background: linear-gradient(135deg, #16211c, #0d1512);
}

.card-visual__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 15px;
  letter-spacing: -0.02em;
  position: relative;
  z-index: 1;
}

.card-visual__chip {
  width: 40px;
  height: 30px;
  border-radius: 6px;
  background: linear-gradient(135deg, rgba(217, 242, 200, 0.9), rgba(217, 242, 200, 0.45));
  position: relative;
  z-index: 1;
}

.card-visual__number {
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: 0.14em;
  position: relative;
  z-index: 1;
  opacity: 0.85;
}

.card-visual__bottom {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  font-size: 11.5px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  opacity: 0.8;
  position: relative;
  z-index: 1;
}

.card-stack {
  position: relative;
  display: grid;
  gap: var(--space-s);
}

.card-stack .card-visual:nth-child(2) {
  transform: translateX(28px) rotate(2deg);
}

/* Topic tiles ------------------------------------------------------------ */

.tile-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--color-border);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-l);
  overflow: hidden;
}

.tile {
  background: var(--color-surface);
  padding: var(--space-l);
  display: flex;
  flex-direction: column;
  gap: var(--space-2xs);
  text-decoration: none;
  color: inherit;
  min-height: 190px;
  transition: background var(--duration-base) var(--ease-out);
}

.tile:hover {
  background: var(--color-surface-alt);
}

.tile__icon {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-s);
  background: var(--color-surface-alt);
  color: var(--color-accent-dark);
  display: grid;
  place-items: center;
  margin-bottom: var(--space-2xs);
}

.tile:hover .tile__icon {
  background: var(--color-highlight);
}

.tile__icon svg {
  width: 19px;
}

.tile__title {
  font-family: var(--font-heading);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: var(--ls-heading);
  line-height: 1.25;
}

.tile__text {
  font-size: 14.5px;
  color: var(--color-secondary);
  line-height: 1.55;
}

/* Link list card --------------------------------------------------------- */

.linklist {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-l);
  padding: var(--space-l);
}

.linklist__title {
  font-family: var(--font-heading);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: var(--ls-eyebrow);
  text-transform: uppercase;
  color: var(--color-secondary);
  margin-bottom: var(--space-s);
  padding-bottom: var(--space-2xs);
  border-bottom: 1px solid var(--color-border);
}

.linklist ul {
  list-style: none;
  display: flex;
  flex-direction: column;
}

.linklist li + li {
  border-top: 1px solid var(--color-border);
}

.linklist a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-s);
  padding: 11px 0;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  text-decoration: none;
}

.linklist a:hover {
  color: var(--color-accent);
}

.linklist a svg {
  width: 12px;
  flex: 0 0 auto;
  color: var(--color-secondary);
}