/* ============================================================
   Subpages — Features / Download / Pricing / Docs / Changelog
   / About / Support — shared layout primitives
============================================================ */

/* ---------- Subpage hero ---------- */
.sub-hero {
  position: relative;
  padding-block: clamp(56px, 7vw, 96px) clamp(40px, 5vw, 64px);
  background:
    radial-gradient(60% 70% at 90% 0%, color-mix(in srgb, var(--teal-100) 50%, transparent) 0%, transparent 60%),
    linear-gradient(180deg, var(--paper) 0%, var(--paper-2) 100%);
  border-bottom: 1px solid var(--line);
}
.sub-hero-inner { max-width: 880px; }
.sub-hero .eyebrow { display: block; margin-bottom: 18px; }
.sub-hero h1 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(40px, 5.6vw, 72px);
  letter-spacing: -0.02em;
  line-height: 1.14;
}
.sub-hero h1 .ital { font-style: italic; color: var(--blue-500); }
.sub-hero .lede { max-width: 56ch; margin-top: 44px; }
.sub-hero .hero-ctas { margin-top: 32px; }

/* ---------- Section primitives ---------- */
.sub-section { padding-block: clamp(56px, 7vw, 96px); }
.sub-section + .sub-section { border-top: 1px solid var(--line); }
.sub-section.alt { background: var(--paper-2); }

.sub-header { max-width: 760px; margin-bottom: 48px; }
.sub-header .eyebrow { display: block; margin-bottom: 14px; }

/* ---------- Feature row (alternating image/text) ---------- */
.feat-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr);
  gap: clamp(40px, 5vw, 80px);
  align-items: center;
  padding-block: clamp(56px, 7vw, 96px);
}
.feat-row + .feat-row { border-top: 1px solid var(--line); }
.feat-row.reverse { grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); }
.feat-row.reverse .feat-copy { order: 2; }
@media (max-width: 980px) {
  .feat-row, .feat-row.reverse { grid-template-columns: 1fr; }
  .feat-row.reverse .feat-copy { order: 0; }
}
.feat-copy .kicker { display: block; margin-bottom: 10px; }
.feat-copy { min-width: 0; }
.feat-copy h2 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(28px, 3.4vw, 44px);
  letter-spacing: -0.018em;
  line-height: 1.05;
  margin-top: 4px;
}
.feat-copy p { color: var(--ink-2); margin: 16px 0; font-size: 16px; line-height: 1.6; }
.feat-list {
  list-style: none; padding: 0; margin: 20px 0 0 0;
  display: flex; flex-direction: column; gap: 10px;
}
.feat-list li {
  display: block; position: relative; padding-left: 28px;
  font-size: 14.5px; color: var(--ink-2); line-height: 1.5;
}
.feat-list li::before {
  content: ""; position: absolute; left: 0; top: 8px;
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--teal-700);
}

/* ---------- Feature visual frames ---------- */
.feat-vis {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: clamp(20px, 3vw, 36px);
  display: grid; place-items: center;
  min-height: 360px;
  min-width: 0;
  position: relative;
  overflow: hidden;
}
.feat-vis.alt {
  background: linear-gradient(180deg, var(--paper-2) 0%, var(--paper-3) 100%);
}
.feat-vis.dark {
  background: var(--navy-900);
  border-color: var(--navy-700);
}

/* ---------- Parchment slide (reusable) ---------- */
.parchment-slide {
  width: 100%;
  aspect-ratio: 16/10;
  border-radius: 8px;
  background: linear-gradient(180deg, var(--parchment) 0%, var(--parchment-2) 100%);
  color: var(--parchment-ink);
  display: grid; place-content: center;
  text-align: center;
  padding: 32px;
  box-shadow: 0 18px 36px -18px rgba(11,21,48,.25);
}
.parchment-slide .ps-title {
  font-family: var(--font-display);
  font-size: clamp(28px, 3.2vw, 44px);
  color: var(--navy-900);
  letter-spacing: -0.01em;
  font-weight: 500;
  margin-bottom: 8px;
  line-height: 1.05;
}
.parchment-slide .ps-eyebrow {
  font-size: 14px;
  color: var(--amber-deep);
  font-weight: 600;
}
.parchment-slide .ps-sub {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 15px;
  color: var(--amber-deep);
  margin-top: 4px;
}

/* ---------- Download page ---------- */
.dl-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  padding: clamp(28px, 4vw, 48px);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(28px, 4vw, 56px);
  align-items: center;
  box-shadow: var(--shadow-md);
  margin-block: 0 56px;
}
@media (max-width: 860px) { .dl-card { grid-template-columns: 1fr; } }
.dl-card-meta {
  display: flex; flex-direction: column; gap: 4px;
  margin-top: 24px;
  font-size: 13.5px;
  color: var(--ink-3);
}
.dl-card-meta b { color: var(--ink); font-weight: 500; }
.dl-card-meta .row {
  display: grid; grid-template-columns: 110px 1fr; gap: 0;
  padding: 8px 0; border-bottom: 1px solid var(--line);
}
.dl-card-meta .row:last-child { border-bottom: 0; }
.dl-vis {
  background: linear-gradient(160deg, var(--navy-900) 0%, var(--navy-800) 100%);
  border-radius: var(--r-lg);
  padding: 36px;
  display: grid; place-items: center;
  position: relative; overflow: hidden;
}
.dl-vis-pkg {
  width: 200px; height: 200px;
  background: #fff;
  border-radius: 20px;
  display: grid; place-items: center;
  position: relative;
  box-shadow: 0 30px 60px -20px rgba(0,0,0,.5);
}
.dl-vis-pkg img { width: 110px; height: 110px; }
.dl-vis-pkg::after {
  content: "AssemblyFlow-1.3.0.zip";
  position: absolute; bottom: -38px; left: 50%; transform: translateX(-50%);
  font-family: var(--font-mono); font-size: 11px;
  color: var(--blue-300);
  white-space: nowrap;
}

/* ---------- Cards grid (system req, etc.) ---------- */
.spec-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
@media (max-width: 860px) { .spec-grid { grid-template-columns: 1fr; } }
.spec-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 24px;
}
.spec-card h4 {
  margin: 0 0 8px 0;
  font-family: var(--font-ui);
  font-size: 12px; letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-4);
  font-weight: 600;
}
.spec-card .val {
  font-family: var(--font-display);
  font-size: 22px;
  color: var(--ink);
  letter-spacing: -0.01em;
  font-weight: 500;
}
.spec-card p { margin: 8px 0 0 0; font-size: 13.5px; color: var(--ink-3); line-height: 1.5; }

/* ---------- Install steps ---------- */
.steps {
  display: grid; gap: 16px;
  counter-reset: step;
}
.step {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 18px;
  padding: 20px 0;
  border-top: 1px solid var(--line);
}
.step:last-child { border-bottom: 1px solid var(--line); }
.step::before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--teal-700);
  font-weight: 600;
}
.step h4 { margin: 0 0 6px 0; font-family: var(--font-display); font-size: 20px; font-weight: 500; letter-spacing: -0.01em; }
.step p { margin: 0; color: var(--ink-2); font-size: 14.5px; line-height: 1.55; }
.step code {
  font-family: var(--font-mono); font-size: 13px;
  background: var(--paper-3); padding: 1px 6px; border-radius: 4px;
  color: var(--ink-2);
}

/* ---------- Pricing page ---------- */
.tier-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
@media (max-width: 860px) { .tier-grid { grid-template-columns: 1fr; } }
.tier {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  padding: clamp(28px, 4vw, 40px);
  display: flex; flex-direction: column;
}
.tier.tier-primary { background: var(--navy-900); color: #fff; border-color: var(--navy-800); }
.tier .tier-eye {
  font-family: var(--font-ui);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-4);
  font-weight: 600;
}
.tier.tier-primary .tier-eye { color: var(--blue-300); }
.tier h3 {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 500;
  letter-spacing: -0.01em;
  margin: 10px 0 4px 0;
}
.tier .tier-price {
  font-family: var(--font-display);
  font-size: 56px;
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1;
  margin: 18px 0 6px 0;
}
.tier .tier-price small {
  font-family: var(--font-ui);
  font-size: 14px;
  color: var(--ink-3);
  font-weight: 400;
  letter-spacing: normal;
  margin-left: 4px;
}
.tier.tier-primary .tier-price small { color: var(--blue-300); }
.tier .tier-lede { color: var(--ink-2); margin: 6px 0 24px 0; font-size: 15px; }
.tier.tier-primary .tier-lede { color: #C8D2E5; }
.tier ul {
  list-style: none; padding: 0; margin: 0;
  display: flex; flex-direction: column; gap: 12px;
  flex: 1;
}
.tier ul li {
  display: block; position: relative; padding-left: 26px;
  font-size: 14.5px; color: var(--ink-2); line-height: 1.5;
}
.tier.tier-primary ul li { color: #C8D2E5; }
.tier ul li::before {
  content: "✓";
  position: absolute; left: 0; top: 0;
  color: var(--teal-700);
  font-weight: 600;
  font-size: 14px;
}
.tier.tier-primary ul li::before { color: var(--teal-500); }
.tier .tier-cta { margin-top: 32px; }
.tier.tier-primary .btn-primary { background: var(--blue-500); border-color: var(--blue-500); }
.tier.tier-primary .btn-primary:hover { background: var(--blue-600); border-color: var(--blue-600); }
.tier.tier-primary .btn-ghost { background: transparent; color: #fff; border-color: rgba(255,255,255,.25); }

.donate-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 16px;
}
.donate-amt {
  padding: 14px 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  text-align: center;
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 500;
  color: var(--ink);
  cursor: pointer;
}
.donate-amt:hover { border-color: var(--teal-700); color: var(--teal-700); }
.donate-amt.is-on { background: var(--teal-50); border-color: var(--teal-700); color: var(--teal-800); }

/* ---------- Docs page ---------- */
.docs-grid {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 56px;
  padding-block: clamp(40px, 5vw, 72px);
  align-items: start;
}
@media (max-width: 980px) {
  .docs-grid { grid-template-columns: 1fr; gap: 32px; }
  .docs-toc { position: static; }
}
.docs-toc {
  position: sticky; top: 80px;
}
.docs-toc h4 {
  font-family: var(--font-ui);
  font-size: 12px; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--ink-4); font-weight: 600;
  margin: 0 0 12px 0;
}
.docs-toc ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 2px; }
.docs-toc a {
  display: block;
  text-decoration: none;
  padding: 7px 10px;
  border-radius: 6px;
  font-size: 14px;
  color: var(--ink-2);
  border-left: 2px solid transparent;
}
.docs-toc a:hover { background: var(--paper-3); color: var(--ink); }
.docs-toc a.is-active { color: var(--teal-800); border-left-color: var(--teal-700); }
.docs-body { max-width: 720px; }
.docs-body section { padding-block: 32px; border-top: 1px solid var(--line); }
.docs-body section:first-of-type { border-top: 0; padding-top: 0; }
.docs-body h2 {
  font-family: var(--font-display);
  font-size: clamp(26px, 3vw, 36px);
  font-weight: 500;
  letter-spacing: -0.018em;
  margin: 0 0 8px 0;
}
.docs-body h3 {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 500;
  letter-spacing: -0.01em;
  margin: 28px 0 8px 0;
  color: var(--ink);
}
.docs-body p, .docs-body li {
  font-size: 15.5px; line-height: 1.65;
  color: var(--ink-2);
}
.docs-body p { margin: 12px 0; }
.docs-body ul, .docs-body ol {
  margin: 12px 0; padding-left: 22px;
  display: flex; flex-direction: column; gap: 6px;
}
.docs-body code {
  font-family: var(--font-mono); font-size: 13.5px;
  background: var(--paper-3); color: var(--ink);
  padding: 2px 6px; border-radius: 4px;
}
.docs-body kbd {
  font-family: var(--font-mono); font-size: 12px;
  padding: 3px 7px;
  background: #fff;
  border: 1px solid var(--rule-2);
  border-bottom-width: 2px;
  border-radius: 4px;
  color: var(--ink);
}
.docs-body .callout {
  margin: 20px 0;
  padding: 14px 18px;
  background: var(--teal-50);
  border-left: 3px solid var(--teal-700);
  border-radius: 0 8px 8px 0;
  font-size: 14.5px;
  color: var(--ink);
}
.docs-body .callout b { color: var(--teal-800); }
.shortcut-table {
  width: 100%; border-collapse: collapse; margin: 16px 0;
}
.shortcut-table td {
  padding: 10px 14px; border-top: 1px solid var(--line);
  font-size: 14.5px; color: var(--ink-2);
}
.shortcut-table td:first-child { width: 36%; }
.shortcut-table tr:last-child td { border-bottom: 1px solid var(--line); }

/* ---------- Changelog ---------- */
.release {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 40px;
  padding-block: 40px;
  border-top: 1px solid var(--line);
}
.release:first-of-type { border-top: 0; }
@media (max-width: 720px) { .release { grid-template-columns: 1fr; gap: 16px; } }
.release-meta {
  position: sticky; top: 90px; align-self: start;
}
.release-tag {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--teal-50);
  color: var(--teal-800);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
}
.release-tag.is-major { background: var(--navy-900); color: #fff; }
.release-date {
  font-size: 13px;
  color: var(--ink-3);
  margin-top: 10px;
}
.release h3 {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 500;
  letter-spacing: -0.018em;
  margin: 0 0 16px 0;
}
.release h4 {
  font-family: var(--font-ui);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--ink-4);
  margin: 22px 0 8px 0;
}
.release ul { padding: 0; margin: 0; list-style: none; display: flex; flex-direction: column; gap: 8px; }
.release li {
  font-size: 15px; line-height: 1.6;
  color: var(--ink-2);
  display: block; position: relative; padding-left: 22px;
}
.release li::before {
  content: ""; position: absolute; left: 0; top: 9px;
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--teal-700);
}
.release li.fix::before { background: var(--amber); }
.release li.break::before { background: #B23A3A; }
.release code { font-family: var(--font-mono); font-size: 13px; background: var(--paper-3); padding: 1px 5px; border-radius: 3px; }

/* ---------- About / Support ---------- */
.about-mission {
  max-width: 760px;
}
.about-mission p {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(20px, 2.2vw, 26px);
  line-height: 1.5;
  color: var(--ink);
  margin: 0 0 24px 0;
}
.about-mission p:first-of-type::before {
  content: "“"; font-size: 1em; color: var(--blue-300); margin-right: 4px;
}
.about-verse {
  font-family: var(--font-display);
  font-style: italic;
  color: var(--ink-3);
  font-size: 15px;
  margin-top: 16px;
}

.values {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
@media (max-width: 860px) { .values { grid-template-columns: 1fr; } }
.value h3 {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 500;
  letter-spacing: -0.01em;
  margin: 0 0 8px 0;
}
.value p { margin: 0; font-size: 15px; line-height: 1.6; color: var(--ink-2); }
.value .v-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--teal-700);
  font-weight: 600;
  margin-bottom: 12px;
  display: block;
}

/* Contact cards */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 16px;
}
@media (max-width: 860px) { .contact-grid { grid-template-columns: 1fr; } }
.contact-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 28px;
}
.contact-card .eyebrow { margin-bottom: 14px; display: block; }
.contact-card h3 { font-family: var(--font-display); font-size: 22px; font-weight: 500; margin: 0 0 8px 0; letter-spacing: -0.01em; }
.contact-card p { margin: 0 0 14px 0; font-size: 14px; color: var(--ink-2); line-height: 1.55; }
.contact-card .contact-link {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--teal-800);
  text-decoration: none;
  display: inline-flex; align-items: center; gap: 6px;
  border-bottom: 1px solid var(--teal-100);
  padding-bottom: 1px;
}
.contact-card .contact-link:hover { border-bottom-color: var(--teal-700); }

/* FAQ */
.faq { display: flex; flex-direction: column; gap: 0; }
.faq details {
  border-top: 1px solid var(--line);
  padding: 22px 0;
}
.faq details:last-child { border-bottom: 1px solid var(--line); }
.faq summary {
  font-family: var(--font-display);
  font-size: 19px;
  color: var(--ink);
  font-weight: 500;
  letter-spacing: -0.01em;
  cursor: pointer;
  list-style: none;
  display: flex; justify-content: space-between; align-items: center;
  gap: 16px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  font-family: var(--font-ui);
  color: var(--teal-700);
  font-size: 22px;
  font-weight: 400;
  line-height: 1;
  flex: none;
}
.faq details[open] summary::after { content: "−"; }
.faq details > p {
  margin: 14px 0 0 0;
  color: var(--ink-2);
  font-size: 15px;
  line-height: 1.6;
  max-width: 64ch;
}