/* ==========================================================================
   Cards
   Surface containers used across the design system.
   ========================================================================== */

/* ── Info card — superficie con línea de acento en hover ── */
.info-card {
  background: var(--color-surface-card);
  box-shadow: inset 0 2px 0 transparent;
  transition: background var(--dur-fast) ease, box-shadow var(--dur-base) var(--ease-expo);
}
.info-card:hover {
  background: var(--color-interactive-subtle);
  box-shadow: inset 0 2px 0 var(--color-borders-accent-default);
}

/* ── Forma Card — superficie base y tile interactivo ── */
.forma-card {
  background: var(--color-surface-card);
  border: 1px solid var(--color-borders-default);
  border-radius: var(--radius-16);
  padding: var(--gap-xl);
  display: flex;
  flex-direction: column;
  gap: var(--gap-xs);
  overflow: hidden;
  transition: box-shadow var(--dur-fast) var(--ease-expo),
              transform  var(--dur-fast) var(--ease-expo);
}
.forma-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.forma-card--elevated {
  background: var(--color-surface-background-elevated);
  box-shadow: var(--shadow-md);
}

.forma-card__icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-8);
  background: var(--color-blue-glow);
  border: 1px solid var(--color-blue-border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--gap-md);
  color: var(--color-blue-500);
}
.forma-card__icon svg {
  overflow: visible;
}

.forma-card__label {
  font-family: var(--font-family-mono);
  font-size: var(--font-size-body-xs);
  color: var(--color-text-accent-default);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: var(--gap-xs);
}

.forma-card__title {
  font-family: var(--font-family-headings);
  font-size: var(--font-size-h5);
  letter-spacing: 0.04em;
  color: var(--color-text-primary);
  margin-bottom: var(--gap-md);
  line-height: var(--line-height-snug);
}

.forma-card__desc {
  font-size: var(--font-size-body-md);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
  margin: 0;
}

/* ==========================================================================
   Cell grids — contenedor de columnas separadas por línea de 1px
   ========================================================================== */

.cell-grid {
  display: grid;
  gap: var(--gap-px);
  background: var(--color-borders-default);
  border: 1px solid var(--color-borders-default);
}

.cell-grid--2 {
  grid-template-columns: 1fr 1fr;
}
@media (max-width: 768px) {
  .cell-grid--2 { grid-template-columns: 1fr; }
}

.cell-grid--3 {
  grid-template-columns: repeat(3, 1fr);
}
@media (max-width: 900px) {
  .cell-grid--3 { grid-template-columns: 1fr; }
}

.cell-grid--4 {
  grid-template-columns: repeat(4, 1fr);
}
@media (max-width: 900px) {
  .cell-grid--4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 540px) {
  .cell-grid--4 { grid-template-columns: 1fr; }
}

/* Card grids — spaced layout (gap-md, no mosaic border trick)
   Use these for independent card layouts, not cell-grid which is mosaic-style. */
.card-grid--3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gap-md);
}
@media (max-width: 900px) {
  .card-grid--3 { grid-template-columns: 1fr; }
}

.card-grid--4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--gap-md);
}
@media (max-width: 900px) {
  .card-grid--4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .card-grid--4 { grid-template-columns: 1fr; }
}

/* ==========================================================================
   Cell — celda de contenido editorial (eyebrow · título · cuerpo · lista)
   ========================================================================== */

.cell {
  padding: var(--gap-2xl) var(--gap-xl);
}

.cell__eyebrow {
  font-family: var(--font-family-mono);
  font-size: var(--font-size-body-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-accent-default);
  margin-bottom: var(--gap-xs);
}

.cell__title {
  font-family: var(--font-family-headings);
  font-size: var(--font-size-h5);
  letter-spacing: 0.04em;
  margin-bottom: var(--gap-sm);
}

.cell__body {
  font-size: var(--font-size-body-md);
  color: var(--color-text-secondary);
  line-height: var(--line-height-base);
}

.cell__list {
  margin-top: var(--gap-lg);
  display: flex;
  flex-direction: column;
  gap: var(--gap-sm);
  list-style: none;
  padding: 0;
}

.tag,
.cell__list li {
  font-family: var(--font-family-mono);
  font-size: var(--font-size-body-xs);
  color: var(--color-text-ghost);
  background: var(--color-surface-background-default);
  border: 1px solid var(--color-borders-default);
  border-radius: var(--radius-4);
  padding: var(--gap-xs) var(--gap-sm);
  display: inline-block;
  align-self: flex-start;
  transition: color var(--dur-fast) ease, background var(--dur-fast) ease, border-color var(--dur-fast) ease;
}

.cell:hover .tag,
.cell:hover .cell__list li {
  color: var(--color-text-accent-default);
  background: var(--color-interactive-subtle);
  border-color: var(--color-borders-accent-dim);
}

/* ── Tier count — número animado específico de token architecture ── */
.tier-count {
  font-family: var(--font-family-headings);
  font-size: var(--font-size-h2);
  line-height: var(--line-height-tight);
  color: var(--color-text-accent-default);
  margin-bottom: var(--gap-md);
}

/* ==========================================================================
   Variantes de padding para celdas de contenido específico
   ========================================================================== */

.content-cell {
  padding: var(--gap-xl);
}
.metric-val {
  font-family: var(--font-family-headings);
  font-size: var(--font-size-h3);
  line-height: var(--line-height-tight);
  color: var(--color-text-accent-default);
  margin-bottom: var(--gap-sm);
}
.metric-label {
  font-family: var(--font-family-mono);
  font-size: var(--font-size-body-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
  margin-bottom: var(--gap-md);
}
.metric-desc {
  font-size: var(--font-size-body-xs);
  color: var(--color-text-ghost);
  line-height: var(--line-height-relaxed);
}

/* ── Forma-card value — large number display (metric tiles) ── */
.forma-card__val {
  font-family: var(--font-family-headings);
  font-size: var(--font-size-h4);
  line-height: var(--line-height-tight);
  color: var(--color-text-primary);
  margin-bottom: var(--gap-xs);
}

/* ── Forma-card delta — change indicator ── */
.forma-card__delta {
  font-family: var(--font-family-mono);
  font-size: var(--font-size-body-xs);
  margin-top: var(--gap-sm);
}
.forma-card__delta--up      { color: var(--color-green-500); }
.forma-card__delta--down    { color: var(--color-red-500); }
.forma-card__delta--neutral { color: var(--color-text-ghost); }

.sc-badge {
  font-family: var(--font-family-mono);
  font-size: var(--font-size-body-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-accent-default);
  margin-bottom: var(--gap-md);
}
.sc-row  { display: flex; flex-direction: column; gap: var(--gap-lg); align-items: flex-start; margin-top: var(--gap-md); }
.sc-pair { display: flex; gap: var(--gap-md); align-items: center; }
.sc-swatch { width: var(--gap-2xl); height: var(--gap-2xl); border: 1px solid var(--color-borders-default); transition: transform var(--dur-fast) ease; }
.sc-swatch:hover { transform: scale(1.1); }
.sc-name { font-family: var(--font-family-mono); font-size: var(--font-size-body-xs); color: var(--color-text-ghost); letter-spacing: 0.06em; }
.sc-hex  { font-family: var(--font-family-mono); font-size: var(--font-size-body-xs); color: var(--color-text-accent-default); }

/* ==========================================================================
   Demo card  (.card-demo)
   Card with an animated/visual stage on top and a body with name, description
   and footer. Used for keyframe catalog and motion demos.
   ========================================================================== */
.card-demo {
  background: var(--color-surface-card);
  border: 1px solid var(--color-borders-default);
  border-radius: var(--radius-12);
  overflow: hidden;
}

.card-demo__stage {
  height: 120px;
  background: var(--color-surface-background-default);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.card-demo__body {
  padding: var(--gap-md);
  display: flex;
  flex-direction: column;
  gap: var(--gap-sm);
}

.card-demo__name {
  font-family: var(--font-family-mono);
  font-size: var(--font-size-body-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-primary);
}

.card-demo__desc {
  font-family: var(--font-family-body);
  font-size: var(--font-size-body-xs);
  color: var(--color-text-secondary);
  line-height: var(--line-height-base);
  margin: 0;
}

.card-demo__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--gap-sm);
  border-top: 1px solid var(--color-borders-default);
  margin-top: var(--gap-xs);
}

.card-demo__stage-label {
  background: var(--color-blue-500);
  border-radius: var(--radius-8);
  color: #fff;
  font-family: var(--font-family-mono);
  font-size: var(--font-size-body-xs);
  padding: 8px 16px;
}

/* Label ghost used in grid demo columns */
.cell-col-label {
  font-family: var(--font-family-mono);
  font-size: var(--font-size-body-xs);
  color: var(--color-text-ghost);
}

/* ==========================================================================
   Preview card  (.card-preview)
   Card with a visual/wireframe zone on top and a label below.
   Used for layout patterns, component thumbnails, etc.
   ========================================================================== */
.card-preview {
  background: var(--color-surface-card);
  border: 1px solid var(--color-borders-default);
  border-radius: var(--radius-8);
  overflow: hidden;
  cursor: default;
  transition: box-shadow var(--dur-fast) var(--ease-expo);
}
.card-preview:hover {
  box-shadow: var(--shadow-md);
}

.card-preview__visual {
  height: 120px;
  background: var(--color-surface-background-default);
  padding: 10px;
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.card-preview__label {
  padding: var(--gap-sm) var(--gap-md);
  font-family: var(--font-family-mono);
  font-size: var(--font-size-body-xs);
  color: var(--color-text-secondary);
  border-top: 1px solid var(--color-borders-default);
}

/* Wireframe blocks used inside card-preview__visual */
.wf-block {
  background: var(--color-neutral-200);
  border-radius: 3px;
}
.wf-block--accent {
  background: var(--color-blue-200);
  border-radius: 3px;
}

/* ==========================================================================
   Article card  (.card-article)
   Full-bleed link card used in the articles listing page.
   ========================================================================== */
.card-article {
  background: var(--color-surface-card);
  border: 1px solid var(--color-borders-default);
  border-radius: var(--radius-12);
  display: flex;
  flex-direction: column;
  text-decoration: none;
  position: relative;
  overflow: hidden;
  transition: transform var(--dur-fast) var(--ease-expo),
              box-shadow var(--dur-fast) var(--ease-expo),
              border-color var(--dur-fast) var(--ease-expo);
  box-shadow: var(--shadow-md);
}

.card-article:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-neutral-300);
}

.card-article--ghost {
  opacity: 0.28;
  cursor: default;
  pointer-events: none;
}

.card-article__visual {
  height: 200px;
  background: var(--color-surface-background-default);
  border-bottom: 1px solid var(--color-borders-default);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.card-article__visual::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--color-borders-hero) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-borders-hero) 1px, transparent 1px);
  background-size: 32px 32px;
  opacity: 0.45;
  pointer-events: none;
}

.card-article__body {
  padding: 28px var(--gap-xl) 0;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.card-article__cat {
  font-family: var(--font-family-mono);
  font-size: var(--font-size-body-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-accent-dim);
  margin-bottom: 14px;
  display: block;
}

.card-article__title {
  font-family: var(--font-family-headings);
  font-size: var(--font-size-h4);
  line-height: var(--line-height-h4);
  letter-spacing: var(--letter-spacing-h4);
  color: var(--color-text-primary);
  margin-bottom: 14px;
}

.card-article__desc {
  font-size: var(--font-size-body-md);
  font-weight: var(--font-weight-regular);
  color: var(--color-text-secondary);
  line-height: var(--line-height-loose);
  flex: 1;
}

.card-article__foot {
  padding: 20px var(--gap-xl) 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border-top: 1px solid var(--color-borders-default);
  margin-top: var(--gap-lg);
}

.card-article__tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.card-article__tag {
  font-family: var(--font-family-mono);
  font-size: var(--font-size-body-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-ghost);
  padding: 2px 7px;
  border: 1px solid var(--color-borders-default);
}

.card-article__meta {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.card-article__date {
  font-family: var(--font-family-mono);
  font-size: var(--font-size-body-xs);
  color: var(--color-text-ghost);
  letter-spacing: 0.04em;
}

.card-article__arrow {
  font-size: var(--font-size-body-xs);
  color: var(--color-blue-400);
  transform: translateX(0);
  opacity: 0;
  transition: transform 180ms var(--easing-standard),
              opacity 180ms var(--easing-standard);
  line-height: var(--line-height-tight);
}

.card-article:hover .card-article__arrow {
  opacity: 1;
  transform: translateX(5px);
}

@media (prefers-reduced-motion: reduce) {
  .card-article { transition: none; }
  .card-article:hover { transform: none; }
}