/* ============================================================
   VOLTLINE — marketing sections
   Features (detailed explainer blocks), specs/changelog,
   pricing comparison table, licensing modal.
   ============================================================ */

/* ---------- Section shells with layered texture ---------- */
.band{position:relative;border-top:1px solid var(--hairline);background:var(--bg-2)}
.band.alt{background:var(--bg)}
.band::before{ /* faint engineering grid texture */
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(var(--hairline) 1px,transparent 1px),
    linear-gradient(90deg,var(--hairline) 1px,transparent 1px);
  background-size:112px 112px;
  -webkit-mask-image:radial-gradient(ellipse 120% 90% at 80% 0%,#000 0%,transparent 70%);
  mask-image:radial-gradient(ellipse 120% 90% at 80% 0%,#000 0%,transparent 70%);
  opacity:.35;
}
.band > .wrap{position:relative;z-index:1}

/* ---------- Feature explainer rows (asymmetric, not cards) ---------- */
.feature-row{
  display:grid;
  grid-template-columns:minmax(0,7fr) minmax(0,5fr);
  gap:3rem;
  align-items:center;
  padding:3.4rem 0;
  border-bottom:1px solid var(--hairline);
}
.feature-row:last-child{border-bottom:0}
.feature-row.flip .feature-copy{order:2}
.feature-row.flip .feature-art{order:1}
.feature-num{
  font-family:var(--mono);font-size:.68rem;letter-spacing:.2em;
  color:var(--accent);display:flex;align-items:center;gap:.7rem;margin-bottom:.9rem;
}
.feature-num::after{content:"";height:1px;width:3rem;background:var(--hairline-strong)}
.feature-copy h3{
  font-family:var(--display);font-weight:800;
  font-size:clamp(1.35rem,2.6vw,1.9rem);letter-spacing:-.02em;line-height:1.12;
  margin:0 0 .8rem;
}
.feature-copy p{color:var(--text-muted);margin:0 0 1.1rem;font-size:1rem}
.feature-specs{
  list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:.45rem;
}
.feature-specs li{
  font-family:var(--mono);font-size:.66rem;letter-spacing:.12em;text-transform:uppercase;
  color:var(--text-muted);border:1px solid var(--hairline);
  padding:.32rem .6rem;background:var(--panel-lo);
}
.feature-specs li b{color:var(--accent);font-weight:600}
.feature-art{
  border:1px solid var(--hairline-strong);
  background:linear-gradient(180deg,var(--panel-hi),var(--panel));
  box-shadow:inset 0 1px 0 rgba(255,255,255,.04), 0 18px 40px -24px #000;
  padding:1.2rem;position:relative;
}
.feature-art svg{width:100%;height:auto;display:block}
.feature-art figcaption{
  position:absolute;top:.7rem;left:.9rem;
  font-family:var(--mono);font-size:.6rem;letter-spacing:.18em;text-transform:uppercase;
  color:var(--text-faint);
}
@media(max-width:860px){
  .feature-row{grid-template-columns:1fr;gap:1.6rem}
  .feature-row.flip .feature-copy{order:1}
  .feature-row.flip .feature-art{order:2}
}

/* ---------- Specs + changelog ---------- */
.spec-grid{
  display:grid;grid-template-columns:minmax(0,6fr) minmax(0,5fr);
  gap:3rem;margin-top:2.6rem;
}
@media(max-width:900px){.spec-grid{grid-template-columns:1fr}}
.spec-table{width:100%;border-collapse:collapse;font-size:.92rem}
.spec-table caption{
  font-family:var(--mono);font-size:.66rem;letter-spacing:.2em;text-transform:uppercase;
  color:var(--accent);text-align:left;padding-bottom:.8rem;
}
.spec-table th,.spec-table td{
  text-align:left;padding:.62rem .8rem;border-bottom:1px solid var(--hairline);
  vertical-align:top;
}
.spec-table th{
  font-family:var(--mono);font-size:.68rem;letter-spacing:.1em;text-transform:uppercase;
  color:var(--text-faint);font-weight:500;width:40%;
}
.spec-table td{color:var(--text)}
.spec-table tr:hover td,.spec-table tr:hover th{background:var(--accent-dim)}
.changelog{list-style:none;margin:0;padding:0}
.changelog caption,.changelog-head{
  font-family:var(--mono);font-size:.66rem;letter-spacing:.2em;text-transform:uppercase;
  color:var(--accent);padding-bottom:.8rem;display:block;
}
.changelog li{
  display:grid;grid-template-columns:auto 1fr;gap:1rem;
  padding:.85rem 0;border-bottom:1px solid var(--hairline);
}
.changelog .ver{
  font-family:var(--mono);font-size:.72rem;color:var(--warm);
  border:1px solid rgba(255,179,71,.35);padding:.14rem .5rem;height:max-content;
  letter-spacing:.06em;
}
.changelog .what{color:var(--text-muted);font-size:.9rem}
.changelog .what b{color:var(--text);font-weight:600}

/* ---------- Pricing comparison ---------- */
.compare-wrap{overflow-x:auto;margin-top:2.6rem;border:1px solid var(--hairline);background:var(--surface)}
table.compare{width:100%;min-width:680px;border-collapse:collapse;font-size:.9rem}
table.compare thead th{
  position:sticky;top:0;background:var(--panel-hi);
  padding:1.1rem .9rem;text-align:center;border-bottom:1px solid var(--hairline-strong);
}
table.compare thead th:first-child{text-align:left}
table.compare .th-name{
  font-family:var(--mono);font-size:.68rem;letter-spacing:.2em;text-transform:uppercase;
  color:var(--text-muted);display:block;margin-bottom:.3rem;
}
table.compare .th-price{font-family:var(--display);font-weight:800;font-size:1.5rem;letter-spacing:-.02em}
table.compare .th-price small{font-size:.75rem;color:var(--text-muted);font-weight:600}
table.compare thead th.pop{color:var(--accent)}
table.compare thead th.pop .th-name{color:var(--accent)}
table.compare tbody th{
  text-align:left;font-weight:500;color:var(--text-muted);
  padding:.6rem .9rem;border-bottom:1px solid var(--hairline);font-size:.88rem;
}
table.compare tbody td{
  text-align:center;padding:.6rem .9rem;border-bottom:1px solid var(--hairline);
  border-left:1px solid var(--hairline);color:var(--text);
}
table.compare col.popcol{background:rgba(216,255,62,.045)}
table.compare .yes{color:var(--accent);font-weight:700}
table.compare .no{color:var(--text-faint)}
table.compare .val{font-family:var(--mono);font-size:.78rem;color:var(--text-muted)}
table.compare tfoot td{padding:1.1rem .9rem;text-align:center;border-left:1px solid var(--hairline)}
table.compare tfoot th{padding:1.1rem .9rem}
.cta-cell{display:flex;justify-content:center}
.pricing-note{
  margin-top:1.4rem;font-family:var(--mono);font-size:.7rem;letter-spacing:.06em;
  color:var(--text-faint);display:flex;gap:1.4rem;flex-wrap:wrap;
}
.pricing-note b{color:var(--text-muted);font-weight:600}

/* ---------- Licensing / info modal ---------- */
dialog.vl-modal{
  border:1px solid var(--hairline-strong);
  background:var(--panel);color:var(--text);
  max-width:560px;width:calc(100vw - 2rem);
  padding:0;border-radius:var(--radius);
  box-shadow:0 30px 80px -20px #000;
}
dialog.vl-modal::backdrop{background:rgba(4,6,5,.78);backdrop-filter:blur(4px) saturate(140%);-webkit-backdrop-filter:blur(4px) saturate(140%)}
.modal-head{
  display:flex;align-items:center;justify-content:space-between;gap:1rem;
  padding:1.1rem 1.4rem;border-bottom:1px solid var(--hairline);
  background:var(--panel-hi);
}
.modal-head h3{
  margin:0;font-family:var(--mono);font-size:.72rem;letter-spacing:.2em;text-transform:uppercase;
  color:var(--accent);font-weight:600;
}
.modal-close{
  width:2rem;height:2rem;border:1px solid var(--hairline-strong);background:var(--panel-lo);
  color:var(--text-muted);display:flex;align-items:center;justify-content:center;
  transition:color var(--fast) var(--ease),border-color var(--fast) var(--ease);
}
.modal-close:hover{color:var(--accent);border-color:var(--accent)}
.modal-body{padding:1.4rem}
.modal-body p{margin:0 0 1rem;color:var(--text-muted);font-size:.95rem}
.modal-body p strong{color:var(--text)}
.modal-list{list-style:none;margin:0 0 1.2rem;padding:0;display:grid;gap:.55rem}
.modal-list li{display:flex;gap:.7rem;font-size:.92rem;align-items:flex-start}
.modal-list svg{width:1rem;height:1rem;flex:none;color:var(--accent);margin-top:.2rem}
.modal-foot{
  display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;
  padding:1.1rem 1.4rem;border-top:1px solid var(--hairline);background:var(--panel-lo);
}
.modal-foot .fine{font-family:var(--mono);font-size:.64rem;letter-spacing:.08em;color:var(--text-faint);align-self:center}

/* ---------- Docs / getting started ---------- */
.doc-steps{
  display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);
  gap:3rem;margin-top:2.4rem;align-items:start;
}
@media(max-width:900px){.doc-steps{grid-template-columns:1fr}}
.steps-list{margin:0;padding:0;list-style:none;counter-reset:step}
.steps-list li{
  counter-increment:step;position:relative;
  padding:1rem 0 1rem 3.4rem;border-bottom:1px solid var(--hairline);
  color:var(--text-muted);font-size:.98rem;
}
.steps-list li:last-child{border-bottom:0}
.steps-list li::before{
  content:counter(step,decimal-leading-zero);
  position:absolute;left:0;top:1rem;
  font-family:var(--mono);font-size:.72rem;letter-spacing:.1em;color:var(--accent);
  border:1px solid var(--hairline-strong);width:2.2rem;height:2.2rem;
  display:flex;align-items:center;justify-content:center;background:var(--panel-lo);
}
.steps-list b{color:var(--text);font-weight:600}
.doc-side{
  border:1px solid var(--hairline-strong);background:var(--panel);
  padding:1.4rem;display:flex;flex-direction:column;gap:.9rem;align-items:flex-start;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.04);
}
.doc-side h3{
  margin:0;font-family:var(--mono);font-size:.66rem;letter-spacing:.2em;
  text-transform:uppercase;color:var(--accent);font-weight:600;
}
.doc-side p{margin:0;color:var(--text-muted);font-size:.92rem}
.doc-side code{
  font-family:var(--mono);font-size:.82em;color:var(--warm);
  background:var(--panel-lo);border:1px solid var(--hairline);padding:.05rem .3rem;
}
.doc-side .btn{margin-top:.4rem;font-size:.8rem;padding:.55rem .9rem}

/* ---------- Footer ---------- */
.site-foot{
  border-top:1px solid var(--hairline-strong);
  background:linear-gradient(180deg,var(--bg-2),var(--panel-lo));
  padding:3.4rem 0 1.6rem;position:relative;
}
.foot-grid{display:grid;grid-template-columns:minmax(0,2fr) minmax(0,1fr) minmax(0,1fr);gap:2.4rem}
@media(max-width:860px){.foot-grid{grid-template-columns:1fr;gap:1.8rem}}
.foot-blurb{color:var(--text-faint);font-size:.9rem;max-width:30rem;margin:1rem 0 0}
.foot-links{display:flex;flex-direction:column;gap:.5rem}
.foot-links h4{
  margin:0 0 .4rem;font-family:var(--mono);font-size:.62rem;letter-spacing:.2em;
  text-transform:uppercase;color:var(--text-faint);font-weight:600;
}
.foot-links a{color:var(--text-muted);font-size:.9rem;width:max-content;transition:color var(--fast) var(--ease)}
.foot-links a:hover{color:var(--accent)}
.link-btn{
  background:none;border:0;padding:0;text-align:left;width:max-content;
  color:var(--text-muted);font-size:.9rem;font-family:inherit;
  transition:color var(--fast) var(--ease);
}
.link-btn:hover{color:var(--accent)}
.foot-base{
  margin-top:2.6rem;padding-top:1.2rem;border-top:1px solid var(--hairline);
  display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;
  font-family:var(--mono);font-size:.64rem;letter-spacing:.1em;color:var(--text-faint);
}

/* ---------- Toast (preset save/import feedback) ---------- */
.toast{
  position:fixed;left:50%;bottom:1.6rem;transform:translate(-50%,140%);
  z-index:120;max-width:min(92vw,26rem);
  background:var(--panel-hi);color:var(--text);
  border:1px solid var(--accent);box-shadow:0 18px 40px -18px #000, inset 0 0 0 1px rgba(0,0,0,.4);
  font-family:var(--mono);font-size:.72rem;letter-spacing:.06em;
  padding:.75rem 1.1rem;border-radius:var(--radius);
  opacity:0;pointer-events:none;
  transition:transform var(--base) var(--decel),opacity var(--base) var(--ease);
}
.toast.show{transform:translate(-50%,0);opacity:1}
@media(prefers-reduced-motion:reduce){
  .toast{transition:opacity var(--base) linear;transform:translate(-50%,0)}
}

/* ---------- Reveal on scroll ---------- */
.reveal{opacity:1}
@media(prefers-reduced-motion:no-preference){
  .reveal{opacity:0;transform:translateY(14px);transition:opacity var(--slow) var(--ease),transform var(--slow) var(--decel)}
  .reveal.in{opacity:1;transform:none}
}