/* ═══════════════════════════════════════
   STANDARD — Three pillar cards
   ═══════════════════════════════════════ */

#standard {
  padding: var(--space-12) 0;
  border-bottom: 1px solid var(--color-line-1);
  position: relative;
  overflow: hidden;
}

#standard .container {
  position: relative;
  z-index: 1;
}

.standard__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
  margin-top: var(--space-6);
}

/* Fixed height — calculated to fit Card II (HONEST) back copy */
.standard__card-wrap {
  perspective: 1200px;
  height: 640px;
  transition: opacity 0.3s ease;
}

.standard__card {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  cursor: pointer;
}

/* ── Faces ── */
.standard__face {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  border: 1px solid var(--color-line-1);
  background: var(--color-bg-1);
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.standard__face--front {
  border-top: 3px solid var(--color-accent);
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.standard__face--back {
  transform: rotateY(180deg);
  background: var(--color-bg-2);
  border-top: 3px solid var(--color-accent-dim);
}

/* ── Front card hover: line turns green, cyan glow ── */
.standard__card-wrap:hover .standard__face--front {
  border-top-color: #00ff88;
  box-shadow: 0 0 40px rgba(0, 229, 255, 0.12), inset 0 0 60px rgba(0, 229, 255, 0.04);
}

/* ── Numerals ── */
.standard__numeral {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-accent);
  margin-bottom: var(--space-3);
}

.standard__title {
  font-size: var(--text-2xl);
  font-style: italic;
  font-weight: 300;
  color: var(--color-text-0);
  margin-bottom: var(--space-2);
}

.standard__underline {
  width: 40px;
  height: 2px;
  background: var(--color-accent);
  margin-bottom: var(--space-3);
  transition: width 0.4s var(--ease-out-expo);
}

.standard__card-wrap:hover .standard__underline {
  width: 96px;
}

.standard__summary {
  font-size: var(--text-base);
  color: var(--color-text-2);
  line-height: var(--line-relaxed);
  flex: 1;
}

.standard__hint {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-text-3);
  margin-top: var(--space-3);
  text-transform: uppercase;
}

/* ── Back face ── */
.standard__back-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-accent-dim);
  margin-bottom: var(--space-3);
  text-transform: uppercase;
}

.standard__back-copy {
  font-size: var(--text-sm);
  color: var(--color-text-1);
  line-height: var(--line-relaxed);
  flex: 1;
  opacity: 0;
  transition: opacity 0.5s ease;
}

.standard__back-copy.is-visible {
  opacity: 1;
}

.standard__close {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-text-3);
  margin-top: var(--space-3);
  text-transform: uppercase;
}

/* ══════════════════════════════════════════════
   EXPANDED STATE — card grows to full grid width
   ══════════════════════════════════════════════ */

/* Ghost outlines: dim the other two cards */
.standard__grid.has-expanded .standard__card-wrap:not(.is-expanding) {
  opacity: 0.18;
  pointer-events: none;
}

/* Expanding wrap sits above ghosts */
.standard__card-wrap.is-expanding {
  z-index: 10;
}

/* Expanded back face: label full-width top, copy fills rest */
.standard__card-wrap.is-expanding .standard__face--back {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-rows: auto 1fr auto;
  gap: var(--space-3) var(--space-6);
  padding: var(--space-7) var(--space-10);
}

.standard__card-wrap.is-expanding .standard__back-label {
  grid-column: 1 / 3;
  grid-row: 1;
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 300;
  font-size: var(--text-xl);
  letter-spacing: 0.04em;
  text-transform: none;
  white-space: nowrap;
  color: var(--color-accent-dim);
  margin-bottom: 0;
  align-self: end;
}

.standard__card-wrap.is-expanding .standard__back-copy {
  grid-column: 1 / 3;
  grid-row: 2;
  align-self: start;
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 300;
  font-size: clamp(var(--text-base), 1.8vw, var(--text-xl));
  color: #00e5ff;
  text-shadow: 0 0 30px rgba(0, 229, 255, 0.18);
  line-height: var(--line-relaxed);
  flex: unset;
}

.standard__card-wrap.is-expanding .standard__close {
  grid-column: 1 / 3;
  grid-row: 3;
  align-self: end;
  margin-top: 0;
}

/* ── Reduced motion ── */
@media (prefers-reduced-motion: reduce) {
  .standard__card {
    transition: none;
  }
}

@media (max-width: 900px) {
  .standard__grid {
    grid-template-columns: 1fr;
  }

  .standard__card-wrap {
    height: 560px;
  }
}