/* Tutorial pillar pages: mockup 31-50 shared system. */
.pillar-page {
  --pillar-canvas: #fff;
  --pillar-muted-canvas: #f7f9fc;
  --pillar-surface: #fff;
  --pillar-text: #111827;
  --pillar-copy: #677185;
  --pillar-border: #e3e8f0;
  --pillar-shadow: 0 10px 26px rgba(10, 27, 55, .08);
  background: var(--pillar-canvas);
  color: var(--pillar-text);
}

html[data-theme="dark"] .pillar-page {
  --pillar-canvas: #06162f;
  --pillar-muted-canvas: #091c39;
  --pillar-surface: #0b203f;
  --pillar-text: #f4f7fb;
  --pillar-copy: #afbbcd;
  --pillar-border: #28405f;
  --pillar-shadow: 0 12px 30px rgba(0, 0, 0, .24);
}

.pillar-page main { background: var(--pillar-canvas); }

.pillar-hero {
  min-height: 20rem;
  padding: 4.2rem 0 5rem;
  color: #fff;
  background:
    radial-gradient(circle at 81% 35%, rgba(104, 76, 255, .34), transparent 25rem),
    linear-gradient(118deg, #061c3d 0%, #071d42 48%, #24155f 100%);
}

.pillar-hero__layout {
  display: grid;
  grid-template-columns: minmax(0, 1.18fr) minmax(20rem, .82fr);
  align-items: center;
  gap: clamp(2.5rem, 7vw, 7rem);
}

.pillar-kicker {
  display: inline-flex;
  margin-bottom: 1rem;
  padding: .38rem .72rem;
  border: 1px solid rgba(255, 126, 25, .42);
  border-radius: 999px;
  color: #ff9b45;
  background: rgba(255, 111, 14, .1);
  font-size: .72rem;
  font-weight: 700;
}

.pillar-hero h1 {
  max-width: 48rem;
  margin: 0 0 1rem;
  color: #fff;
  font-size: clamp(2.25rem, 4.3vw, 3.7rem);
  line-height: 1.08;
  letter-spacing: -.04em;
}

.pillar-hero h1 span { color: #ff6d0b; }
.pillar-hero p { max-width: 48rem; margin: 0; color: #c0cada; line-height: 1.65; }

.pillar-hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: .55rem;
  margin: 1.35rem 0 0;
  padding: 0;
  list-style: none;
}

.pillar-hero__tags li {
  padding: .42rem .76rem;
  border: 1px solid rgba(255,255,255,.16);
  border-radius: 999px;
  color: #dae2ee;
  background: rgba(255,255,255,.07);
  font-size: .7rem;
  font-weight: 600;
}

.pillar-symbol {
  display: grid;
  min-height: 15.5rem;
  place-items: center;
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 1rem;
  color: #fff;
  background: linear-gradient(135deg, rgba(76, 96, 190, .45), rgba(75, 30, 170, .44));
  box-shadow: inset 0 1px 0 rgba(255,255,255,.08);
  font-size: clamp(3.5rem, 7vw, 6.5rem);
  font-weight: 700;
  letter-spacing: -.05em;
}

.pillar-feature-bar {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: -2.7rem;
  border: 1px solid var(--pillar-border);
  border-radius: .75rem;
  background: var(--pillar-surface);
  box-shadow: var(--pillar-shadow);
}

.pillar-feature {
  display: grid;
  grid-template-columns: 2.7rem minmax(0, 1fr);
  gap: .85rem;
  align-items: center;
  min-height: 6.8rem;
  padding: 1.25rem;
}

.pillar-feature + .pillar-feature { border-left: 1px solid var(--pillar-border); }
.pillar-feature__icon { display: grid; width: 2.55rem; height: 2.55rem; place-items: center; border-radius: .48rem; color: #fff; background: linear-gradient(135deg, #7a35ef, #633eff); font-weight: 800; }
.pillar-feature:nth-child(2) .pillar-feature__icon { background: linear-gradient(135deg, #1a77ee, #268ffc); }
.pillar-feature:nth-child(3) .pillar-feature__icon { background: linear-gradient(135deg, #1ab68d, #35c99d); }
.pillar-feature:nth-child(4) .pillar-feature__icon { background: linear-gradient(135deg, #ff6500, #ff8c1c); }
.pillar-feature strong { display: block; color: var(--pillar-text); font-size: .9rem; }
.pillar-feature small { display: block; margin-top: .2rem; color: var(--pillar-copy); font-size: .67rem; line-height: 1.45; }

.pillar-section { padding: clamp(4rem, 7vw, 6.4rem) 0; background: var(--pillar-canvas); }
.pillar-section--muted { background: var(--pillar-muted-canvas); }
.pillar-section__heading { margin: 0 auto 2.6rem; text-align: center; }
.pillar-section__heading h2 { margin: 0; color: var(--pillar-text); font-size: clamp(1.8rem, 3.2vw, 2.45rem); }
.pillar-section__heading p { margin: .65rem auto 0; color: var(--pillar-copy); font-size: .88rem; }

.pillar-grid { display: grid; gap: 1.1rem; }
.pillar-grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.pillar-grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.pillar-card {
  display: block;
  min-width: 0;
  padding: 1.45rem;
  border: 1px solid var(--pillar-border);
  border-radius: .72rem;
  color: var(--pillar-text);
  background: var(--pillar-surface);
  box-shadow: var(--pillar-shadow);
  text-decoration: none;
  transition: transform .18s ease, border-color .18s ease, box-shadow .18s ease;
}

a.pillar-card:hover { transform: translateY(-3px); border-color: #7a67ff; box-shadow: 0 15px 32px rgba(61, 47, 144, .14); }
.pillar-card h3 { margin: .7rem 0 .52rem; color: var(--pillar-text); font-size: 1rem; }
.pillar-card p { margin: 0; color: var(--pillar-copy); font-size: .76rem; line-height: 1.55; }
.pillar-number { display: grid; width: 2.7rem; height: 2.7rem; place-items: center; border-radius: .55rem; color: #fff; background: linear-gradient(135deg, #7b39ee, #414cfa); font-weight: 800; }
.pillar-card__meta { display: flex; flex-wrap: wrap; gap: .45rem; margin-top: .85rem; }
.pillar-chip { padding: .26rem .48rem; border-radius: 999px; color: #267c66; background: #eafaf3; font-size: .6rem; font-weight: 700; }
.pillar-chip--blue { color: #3c72bb; background: #edf5ff; }
.pillar-chip--orange { color: #d76716; background: #fff1e6; }

.pillar-tutorial-card { min-height: 10.2rem; }
.pillar-tutorial-card h3 { margin-top: .65rem; }
.pillar-tutorial-type { color: #de6c1f; font-size: .58rem; font-weight: 800; letter-spacing: .03em; text-transform: uppercase; }

.pillar-projects { padding: 4.5rem 0 4.9rem; color: #fff; background: #071c3c; }
.pillar-projects .pillar-section__heading h2 { color: #fff; }
.pillar-projects .pillar-section__heading p { color: #aab9cc; }
.pillar-projects .pillar-card { min-height: 9.5rem; border-color: rgba(255,255,255,.16); }

.pillar-progress-layout { display: grid; grid-template-columns: minmax(0, .98fr) minmax(0, 1.02fr); gap: 1.4rem; align-items: start; }
.pillar-progress-layout > section > h2 { margin: 0 0 1.2rem; color: var(--pillar-text); font-size: 1.6rem; }
.pillar-progress-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.pillar-progress-card { position: relative; min-height: 8.2rem; padding: 1.35rem; }
.pillar-progress-card .pillar-step { position: absolute; top: -.65rem; left: .15rem; display: grid; width: 1.55rem; height: 1.55rem; place-items: center; border-radius: 50%; color: #fff; background: #ff6b0b; font-size: .68rem; font-weight: 800; }

.pillar-popular { padding: 1.45rem; }
.pillar-popular h2 { margin: 0 0 .7rem; color: var(--pillar-text); font-size: 1.6rem; }
.pillar-popular ol { margin: 0; padding: 0; list-style: none; }
.pillar-popular li + li { border-top: 1px solid var(--pillar-border); }
.pillar-popular a { display: grid; grid-template-columns: 2rem minmax(0, 1fr) auto; gap: .7rem; align-items: center; padding: .72rem 0; color: var(--pillar-text); text-decoration: none; }
.pillar-popular__number { display: grid; width: 1.8rem; height: 1.8rem; place-items: center; border-radius: 50%; color: #fff; background: linear-gradient(135deg, #ff7a14, #6f46dd); font-size: .68rem; font-weight: 800; }
.pillar-popular strong, .pillar-popular small { display: block; }
.pillar-popular strong { font-size: .78rem; }
.pillar-popular small { margin-top: .12rem; color: var(--pillar-copy); font-size: .6rem; }

.pillar-faq { padding: clamp(4rem, 7vw, 6.5rem) 0; background: var(--pillar-muted-canvas); }
.pillar-faq details { margin-bottom: .7rem; border: 1px solid var(--pillar-border); border-radius: .45rem; color: var(--pillar-text); background: var(--pillar-surface); }
.pillar-faq summary { padding: 1rem 1.15rem; cursor: pointer; font-size: .78rem; font-weight: 700; }
.pillar-faq details p { margin: 0; padding: 0 1.15rem 1rem; color: var(--pillar-copy); font-size: .76rem; }

.pillar-cta { display: flex; align-items: center; justify-content: space-between; gap: 2rem; margin-top: 2.2rem; padding: 1.85rem 2rem; border: 1px solid #e8def0; border-radius: .75rem; background: linear-gradient(105deg, #faf4ff, #fff5eb); }
.pillar-cta h2 { margin: 0; color: #172035; font-size: 1.35rem; }
.pillar-cta p { margin: .5rem 0 0; color: #566175; font-size: .76rem; }
html[data-theme="dark"] .pillar-cta { border-color: #3b3b65; background: linear-gradient(105deg, #20234d, #3c2928); }
html[data-theme="dark"] .pillar-cta h2 { color: #fff; }
html[data-theme="dark"] .pillar-cta p { color: #c2cbda; }

@media (max-width: 64rem) {
  .pillar-hero__layout { grid-template-columns: minmax(0, 1fr) minmax(15rem, .55fr); gap: 2rem; }
  .pillar-feature-bar { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .pillar-feature:nth-child(3) { border-left: 0; border-top: 1px solid var(--pillar-border); }
  .pillar-feature:nth-child(4) { border-top: 1px solid var(--pillar-border); }
  .pillar-grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 48rem) {
  .pillar-hero { min-height: 0; padding: 3.2rem 0 4.7rem; }
  .pillar-hero__layout, .pillar-progress-layout { grid-template-columns: 1fr; }
  .pillar-symbol { min-height: 9rem; }
  .pillar-grid--3 { grid-template-columns: 1fr; }
  .pillar-cta { align-items: stretch; flex-direction: column; }
  .pillar-cta .button { width: 100%; }
}

@media (max-width: 36rem) {
  .pillar-feature-bar, .pillar-grid--4, .pillar-progress-grid { grid-template-columns: 1fr; }
  .pillar-feature + .pillar-feature { border-top: 1px solid var(--pillar-border); border-left: 0; }
  .pillar-feature { min-height: 5.8rem; padding: 1rem; }
  .pillar-section, .pillar-faq { padding-block: 3.5rem; }
  .pillar-card { padding: 1.15rem; }
  .pillar-cta { padding: 1.3rem; }
}

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