/* ==========================================================================
   Block: Topic Cards (stepica/topic-cards)
   Layouts: grid · numbered · sticky · bento
   ========================================================================== */
.tcards-head.section-heading { max-width: 780px; margin: 0 auto 52px; }
.tcards-head .section-title { max-width: none; }
.tcards-intro { max-width: 720px; margin: 0 auto; }
.tcards-intro p { color: var(--dark-gray); font-size: 1.04rem; }
.lp-bg--dark .tcards-intro p { color: rgba(255, 255, 255, 0.72); }
.tcards-head.lp-heading .tcards-intro { margin: 0; }

/* ---------- Shared card ---------- */
.tcard {
  position: relative;
  padding: 32px 30px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--white);
  overflow: hidden;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s var(--ease);
}
.tcard::before {
  content: '';
  position: absolute;
  inset: 0 0 auto;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--teal), var(--orange));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .4s var(--ease);
}
.tcard:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: transparent; }
.tcard:hover::before { transform: scaleX(1); }
.tcard-icon {
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  margin-bottom: 20px;
  border-radius: 15px;
  background: linear-gradient(135deg, rgba(37, 48, 91, 0.08), rgba(69, 114, 183, 0.16));
  color: var(--primary);
  font-size: 1.2rem;
  transition: background .3s var(--ease), color .3s var(--ease);
}
.tcard:hover .tcard-icon { background: linear-gradient(135deg, var(--primary), var(--teal)); color: var(--white); }
.tcard-title { font-size: 1.12rem; margin-bottom: 10px; line-height: 1.35; }
.tcard p { font-size: 0.94rem; line-height: 1.75; }
.tcard p + p { margin-top: 10px; }
.tcard-points { margin-top: 16px; gap: 9px; }
.tcard-points li { font-size: 0.9rem; }

.lp-bg--light .tcard { border-color: transparent; box-shadow: var(--shadow-sm); }
.lp-bg--dark .tcard { background: rgba(255, 255, 255, 0.05); border-color: rgba(255, 255, 255, 0.1); }
.lp-bg--dark .tcard:hover { background: rgba(255, 255, 255, 0.08); box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3); }
.lp-bg--dark .tcard-icon { background: rgba(157, 188, 232, 0.14); color: var(--teal-light); }
.lp-bg--dark .tcard:hover .tcard-icon { background: var(--teal); color: var(--white); }

/* ---------- Grid ---------- */
.tcards-grid { display: grid; grid-template-columns: repeat(var(--cols, 3), minmax(0, 1fr)); gap: 24px; }

/* ---------- Bento ---------- */
.tcards-bento { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.tcards-bento .is-featured {
  grid-row: span 2;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  min-height: 100%;
  padding: 40px 36px;
  border: 0;
  background:
    radial-gradient(circle at 85% 12%, rgba(157, 188, 232, 0.3), transparent 45%),
    linear-gradient(160deg, var(--navy) 0%, var(--primary) 65%, var(--teal) 140%);
  box-shadow: var(--shadow-lg);
}
.tcards-bento .is-featured .tcard-title { font-size: 1.45rem; color: var(--white); }
.tcards-bento .is-featured p { color: rgba(255, 255, 255, 0.78); font-size: 1rem; }
.tcards-bento .is-featured .tcard-icon {
  width: 64px;
  height: 64px;
  margin-bottom: auto;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.12);
  color: var(--white);
  font-size: 1.5rem;
}
.tcards-bento .is-featured .tcard-icon + .tcard-title { margin-top: 48px; }
.tcards-bento .is-featured .lp-check li { color: var(--white); }
.tcards-bento[data-count="2"] { grid-template-columns: 1.2fr 1fr; }
.tcards-bento[data-count="2"] .is-featured { grid-row: auto; }
.tcards-bento[data-count="3"] { grid-template-columns: 1.15fr 1fr; }
.tcards-bento[data-count="4"] > :last-child { grid-column: span 2; }

/* ---------- Numbered ---------- */
.tcards-numbered { counter-reset: none; display: grid; gap: 0; max-width: 1080px; margin: 0 auto; }
.tnum {
  display: grid;
  grid-template-columns: 96px minmax(0, 0.9fr) minmax(0, 1.4fr);
  gap: 28px;
  align-items: start;
  padding: 34px 0;
  border-top: 1px solid var(--border);
}
.tnum:last-child { border-bottom: 1px solid var(--border); }
.tnum-no {
  font-family: var(--font-display);
  font-size: 3.2rem;
  font-weight: 800;
  line-height: 1;
  background: linear-gradient(180deg, var(--teal) 0%, rgba(69, 114, 183, 0.15) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  transition: transform .3s var(--ease);
}
.tnum:hover .tnum-no { transform: translateX(6px); }
.tnum-head { display: flex; align-items: flex-start; gap: 14px; }
.tnum-head .tcard-icon { flex-shrink: 0; width: 44px; height: 44px; margin: 0; font-size: 1rem; }
.tnum-head .tcard-title { font-size: 1.2rem; margin: 8px 0 0; }
.tnum-body p { font-size: 0.97rem; line-height: 1.8; }
.tnum-body p + p { margin-top: 10px; }
.tnum-body .lp-check { margin-top: 16px; }
.lp-bg--dark .tnum { border-color: rgba(255, 255, 255, 0.12); }
.lp-bg--dark .tnum-no { background-image: linear-gradient(180deg, var(--teal-light), rgba(157, 188, 232, 0.12)); }
.lp-bg--dark .tnum-head .tcard-icon { background: rgba(157, 188, 232, 0.14); color: var(--teal-light); }

/* ---------- Sticky ---------- */
.tcards-sticky { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: 72px; align-items: start; }
.tcards-aside { position: sticky; top: calc(var(--header-h) + 32px); }
.tcards-aside .tcards-head { margin-bottom: 28px; }
.tcards-photo { aspect-ratio: 3 / 2.2; box-shadow: var(--shadow-md); }
.tcards-aside .tcards-footer { text-align: left; margin-top: 28px; }
.tcards-stack { display: grid; gap: 18px; }
.tcard--row { display: flex; gap: 20px; padding: 28px; }
.tcard--row .tcard-icon { flex-shrink: 0; margin: 0; }

/* ---------- Footer ---------- */
.tcards-footer { margin-top: 44px; text-align: center; }
.tcards-note { max-width: 720px; margin: 0 auto 22px; }
.tcards-note p { font-size: 0.98rem; line-height: 1.75; color: var(--dark-gray); }
.lp-bg--dark .tcards-note p { color: rgba(255, 255, 255, 0.72); }
.tcards-aside .tcards-note { margin: 0 0 18px; }

/* ---------- Responsive ---------- */
@media (max-width: 1080px) {
  .tcards-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .tcards-bento,
  .tcards-bento[data-count] { grid-template-columns: 1fr 1fr; }
  .tcards-bento .is-featured { grid-row: auto; grid-column: 1 / -1; }
  .tcards-bento[data-count="4"] > :last-child { grid-column: auto; }
  .tcards-bento[data-count="4"] > :last-child,
  .tcards-bento[data-count="2"] > :last-child { grid-column: 1 / -1; }
}
@media (max-width: 980px) {
  .tcards-sticky { grid-template-columns: 1fr; gap: 40px; }
  .tcards-aside { position: relative; top: auto; }
  .tcards-photo { max-width: 560px; }
  .tnum { grid-template-columns: 64px minmax(0, 1fr); gap: 14px 22px; }
  .tnum-no { font-size: 2.4rem; grid-row: span 2; }
}
@media (max-width: 640px) {
  .tcards-grid,
  .tcards-bento,
  .tcards-bento[data-count] { grid-template-columns: 1fr; }
  .tcards-bento > * { grid-column: auto !important; }
  .tcard { padding: 26px 22px; }
  .tcard--row { flex-direction: column; gap: 16px; }
  .tnum { grid-template-columns: 1fr; padding: 28px 0; }
  .tnum-no { grid-row: auto; font-size: 2rem; }
}
.tcard-points + .tcard-after,
.tcard-points + p { margin-top: 16px; }