/* ==========================================================================
   GEMINOL LUBES CORPORATION — Design System
   Concept: the visual language of an oil analysis certificate / viscosity
   datasheet, built on the brand's own logo palette — bracket green,
   wordmark blue, droplet orange. Orange is spent in one place only (the
   viscosity chart and the droplet); green carries primary actions and
   structure; blue carries links and voice. Mono type reserved for data.
   ========================================================================== */

:root{
  /* --- color: derived from the Geminol logo --- */
  --canvas:      #F4F6F4;
  --panel:       #FFFFFF;
  --surface:     #E9EEEA;
  --ink:         #14191B;
  --ink-soft:    #4A544D;
  --ink-faint:   #7E887F;
  --ink-dark:    #0D2618;
  --line:        #D2D8D3;
  --line-strong: #AFB8B1;

  --green:       #0E9448;
  --green-deep:  #0B7A3B;
  --green-pale:  #E1F4E7;

  --blue:        #0B8FD1;
  --blue-deep:   #076B9E;
  --blue-pale:   #DFF1FB;

  --accent:      #E2681C;
  --accent-deep: #B84E12;
  --accent-pale: #FBE4CE;
  --accent-dark-bg: #F2985E;
  --signal:      #93301E;

  /* --- type --- */
  --f-display: 'Space Grotesk', system-ui, sans-serif;
  --f-body:    'Source Sans 3', system-ui, -apple-system, sans-serif;
  --f-mono:    'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, monospace;

  /* --- layout --- */
  --maxw: 1180px;
  --gutter: 1.75rem;
  --radius: 2px;
}

*,*::before,*::after{ box-sizing:border-box; }
html{ font-size:16px; scroll-behavior:smooth; }
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *,*::before,*::after{ animation-duration:0.001ms !important; animation-iteration-count:1 !important; transition-duration:0.001ms !important; }
}

body{
  margin:0;
  font-family:var(--f-body);
  background:var(--canvas);
  color:var(--ink-soft);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}

h1,h2,h3,h4{
  font-family:var(--f-display);
  color:var(--ink);
  font-weight:600;
  line-height:1.12;
  letter-spacing:-0.01em;
  margin:0 0 1rem;
}
h1{ font-size:clamp(2.3rem, 4.4vw, 3.5rem); font-weight:700; }
h2{ font-size:clamp(1.55rem, 2.6vw, 2.1rem); }
h3{ font-size:1.15rem; }

p{ margin:0 0 1.1rem; max-width:62ch; }
a{ color:var(--blue-deep); text-decoration:none; }
a:hover{ text-decoration:underline; text-underline-offset:3px; }

button, input{ font-family:inherit; }

:focus-visible{
  outline:2px solid var(--accent);
  outline-offset:2px;
}

.skip-link{
  position:absolute;
  left:1rem; top:-3rem;
  background:var(--ink);
  color:#fff;
  padding:0.65rem 1.1rem;
  font-size:0.9rem;
  font-weight:600;
  z-index:200;
  border-radius:var(--radius);
  transition:top .15s ease;
}
.skip-link:focus{ top:1rem; }

.mono{ font-family:var(--f-mono); }

.container{
  max-width:var(--maxw);
  margin:0 auto;
  padding:0 var(--gutter);
}

.lede{
  font-size:1.08rem;
  color:var(--ink-soft);
  max-width:56ch;
}

.section{
  padding:5rem 0;
  border-bottom:1px solid var(--line);
}
.section--tight{ padding:3.5rem 0; }
.section--surface{ background:var(--surface); }
.section--ink{ background:var(--ink-dark); border-bottom:1px solid var(--ink-dark); color:#CFE0D3; }
.section--ink h2, .section--ink h3{ color:#F2F7F3; }
.section--ink p{ color:#A9C2AF; }
.section--ink .kicker{ color:var(--accent-dark-bg); }

.kicker{
  display:block;
  font-family:var(--f-mono);
  font-size:0.78rem;
  color:var(--green-deep);
  margin-bottom:0.85rem;
  letter-spacing:0.01em;
}

/* --------------------------------- buttons ------------------------------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:0.5rem;
  padding:0.8rem 1.5rem;
  font-family:var(--f-body);
  font-weight:600;
  font-size:0.95rem;
  border:1px solid transparent;
  border-radius:var(--radius);
  cursor:pointer;
  transition:background-color .15s ease, color .15s ease, border-color .15s ease, transform .1s ease;
}
.btn:active{ transform:translateY(1px); }
.btn-primary{
  background:var(--green);
  color:#fff;
}
.btn-primary:hover{ background:var(--green-deep); text-decoration:none; }
.btn-outline{
  background:transparent;
  border-color:var(--ink);
  color:var(--ink);
}
.btn-outline:hover{ background:var(--ink); color:#fff; text-decoration:none; }
.section--ink .btn-outline{ border-color:#7FA98A; color:#F2F7F3; }
.section--ink .btn-outline:hover{ background:#F2F7F3; color:var(--ink-dark); }
.btn-row{ display:flex; gap:1rem; flex-wrap:wrap; margin-top:2rem; }

/* --------------------------------- header -------------------------------- */
.site-header{
  position:sticky; top:0; z-index:50;
  background:var(--panel);
  border-bottom:1px solid var(--line-strong);
  transition:box-shadow .2s ease;
}
.site-header.is-scrolled{
  box-shadow:0 6px 16px -12px rgba(13,38,24,0.35);
}
.header-inner{
  display:flex; align-items:center; justify-content:space-between;
  padding:1.1rem var(--gutter);
  max-width:var(--maxw); margin:0 auto;
}
.brand{
  display:flex; flex-direction:column; align-items:flex-start;
  gap:0.4rem; min-width:0;
  text-decoration:none;
}
.brand:hover{ text-decoration:none; }
.logo-wrap{ position:relative; display:inline-flex; line-height:0; }
.logo-img{ height:38px; width:auto; display:block; }
.reg-mark{
  position:absolute;
  top:-2px; right:-11px;
  font-family:var(--f-mono);
  font-size:0.62rem;
  line-height:1;
  color:var(--ink-faint);
}
.footer-logo-chip .reg-mark{ color:var(--ink-faint); }
.brand-info{
  display:flex; flex-direction:column; gap:0.1rem;
  max-width:min(72vw, 360px);
}
.brand-name{
  font-family:var(--f-display);
  font-weight:700;
  font-size:0.92rem;
  color:var(--ink);
  letter-spacing:0.03em;
  line-height:1.2;
}
.brand-tagline{
  font-family:var(--f-mono);
  font-size:0.68rem;
  color:var(--ink-soft);
  line-height:1.35;
}
.brand-sector{
  font-family:var(--f-mono);
  font-size:0.64rem;
  color:var(--ink-faint);
  line-height:1.35;
}
.brand-tag{
  font-family:var(--f-mono);
  font-size:0.72rem;
  color:var(--ink-faint);
  border-left:1px solid var(--line-strong);
  padding-left:0.75rem;
  line-height:1.3;
}
.brand-word{
  font-family:var(--f-display);
  font-weight:700;
  font-size:1.05rem;
  color:var(--ink);
  line-height:1.15;
}
.brand-word small{
  display:block;
  font-family:var(--f-mono);
  font-weight:400;
  font-size:0.68rem;
  color:var(--ink-faint);
  letter-spacing:0.02em;
}
.nav-menu{
  display:flex; gap:2.1rem;
  list-style:none; margin:0; padding:0;
}
.nav-menu a{
  color:var(--ink-soft);
  font-size:0.95rem;
  font-weight:500;
  padding-bottom:4px;
  border-bottom:2px solid transparent;
}
.nav-menu a:hover{ color:var(--ink); text-decoration:none; }
.nav-menu a.active{ color:var(--ink); border-bottom-color:var(--green); font-weight:600; }
.nav-toggle{ display:none; }

/* --------------------------------- hero ---------------------------------- */
.hero{
  padding:4.5rem 0 5rem;
  background:var(--panel);
  border-bottom:1px solid var(--line);
}
.hero-grid{
  display:grid;
  grid-template-columns:1.05fr 0.95fr;
  gap:3.5rem;
  align-items:center;
}
.hero-copy .badge{
  display:inline-block;
  font-family:var(--f-mono);
  font-size:0.78rem;
  color:var(--green-deep);
  background:var(--green-pale);
  padding:0.32rem 0.7rem;
  border-radius:2px;
  margin-bottom:1.25rem;
}
.hero-copy h1{ max-width:14ch; }
blockquote.motto{
  margin:1.5rem 0 0;
  padding-left:1.1rem;
  border-left:3px solid var(--accent);
  font-family:var(--f-display);
  font-size:1.15rem;
  font-style:normal;
  color:var(--ink);
  max-width:42ch;
}
blockquote.motto cite{ display:block; font-style:normal; font-family:var(--f-body); font-size:0.85rem; color:var(--ink-faint); margin-top:0.6rem; }

/* viscosity chart panel */
.chart-panel{
  background:var(--panel);
  border:1px solid var(--line-strong);
  padding:1.5rem 1.5rem 1.25rem;
  box-shadow:0 18px 40px -28px rgba(22,25,27,0.35);
}
.chart-panel-head{
  display:flex; justify-content:space-between; align-items:baseline;
  margin-bottom:0.75rem;
}
.chart-panel-head h3{ margin:0; font-size:0.95rem; color:var(--ink); }
.chart-panel-head span{ font-family:var(--f-mono); font-size:0.72rem; color:var(--ink-faint); }
.chart-svg{ width:100%; height:auto; display:block; }
.chart-legend{
  display:flex; gap:1.5rem; margin-top:0.9rem; flex-wrap:wrap;
}
.legend-item{
  display:flex; align-items:center; gap:0.45rem;
  font-family:var(--f-mono); font-size:0.72rem; color:var(--ink-soft);
  background:none; border:none; padding:0.2rem 0; cursor:pointer;
  opacity:1; transition:opacity .15s ease, color .15s ease;
}
.legend-item.is-dimmed{ opacity:0.4; }
.legend-item:hover, .legend-item:focus-visible{ color:var(--ink); }
.chart-legend i{ width:14px; height:3px; display:inline-block; border-radius:2px; }

.draw-line{
  stroke-dasharray:900;
  stroke-dashoffset:900;
  animation:draw 1.8s ease-out forwards;
  transition:stroke-width .15s ease, opacity .15s ease;
}
.draw-line.delay{ animation-delay:0.35s; }
@keyframes draw{ to{ stroke-dashoffset:0; } }
@media (prefers-reduced-motion: reduce){
  .draw-line{ animation:none; stroke-dashoffset:0; }
}

/* --------------------------------- stat line ------------------------------ */
.stat-line{
  display:flex;
  flex-wrap:wrap;
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.stat-line .stat{
  flex:1 1 0;
  padding:2rem var(--gutter);
  border-left:1px solid var(--line);
}
.stat-line .stat:first-child{ border-left:none; }
.stat .num{
  display:block;
  font-family:var(--f-mono);
  font-size:1.9rem;
  color:var(--ink);
  font-weight:500;
}
.stat .label{
  display:block;
  font-size:0.88rem;
  color:var(--ink-soft);
  margin-top:0.3rem;
}

/* ----------------------------- reasons list -------------------------------- */
.reason-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  border-top:1px solid var(--line);
}
.reason{
  padding:1.75rem 1.5rem 1.75rem 0;
  border-left:1px solid var(--line);
  padding-left:1.5rem;
}
.reason:first-child{ border-left:none; padding-left:0; }
.reason h3{ font-size:1rem; margin-bottom:0.6rem; }
.reason p{ font-size:0.92rem; margin-bottom:0; }

/* ------------------------------ two column doc ---------------------------- */
.doc-split{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:0;
  border:1px solid var(--line);
  background:var(--panel);
}
.doc-split .doc-col{
  padding:2.75rem;
}
.doc-split .doc-col + .doc-col{
  border-left:1px solid var(--line);
}
.doc-col h3{ margin-bottom:0.9rem; }

/* ----------------------------- category preview --------------------------- */
.category-grid{
  display:grid;
  grid-template-columns:1.35fr 1fr;
  gap:1.75rem;
}
.category-panel{
  border:1px solid var(--line-strong);
  background:var(--panel);
  padding:2.5rem;
  display:flex;
  flex-direction:column;
  justify-content:space-between;
  min-height:280px;
  text-decoration:none;
  color:inherit;
  transition:border-color .15s ease, box-shadow .15s ease;
}
.category-panel:hover{
  text-decoration:none;
  border-color:var(--green);
  box-shadow:0 14px 30px -24px rgba(13,38,24,0.45);
}
.category-panel.is-primary{
  background:var(--ink-dark);
  color:#CFE0D3;
  border-color:var(--ink-dark);
}
.category-panel.is-primary:hover{ border-color:var(--accent-dark-bg); }
.category-panel.is-primary h3{ color:#F2F7F3; }
.category-panel.is-primary p{ color:#A9C2AF; }
.category-count{
  font-family:var(--f-mono);
  font-size:2.6rem;
  color:var(--accent);
}
.category-panel.is-primary .category-count{ color:var(--accent-dark-bg); }
.category-panel .cat-link{
  font-weight:600;
  color:var(--blue-deep);
}
.category-panel.is-primary .cat-link{ color:var(--accent-dark-bg); }
.category-panel:hover .cat-link{ text-decoration:underline; text-underline-offset:3px; }

/* ------------------------------- founder block ----------------------------- */
.founder{
  display:grid;
  grid-template-columns:220px 1fr;
  gap:3rem;
  align-items:start;
}
.founder-mark{
  width:200px; height:200px;
  border:1px solid var(--line-strong);
  background:var(--panel);
  display:flex; align-items:center; justify-content:center;
  font-family:var(--f-display);
  font-size:3.4rem;
  font-weight:700;
  color:var(--blue-deep);
}
.founder blockquote{
  margin:0 0 1.25rem;
  font-family:var(--f-display);
  font-size:1.4rem;
  font-weight:500;
  color:var(--ink);
  line-height:1.4;
  padding-left:1.1rem;
  border-left:3px solid var(--blue);
}

/* -------------------------------- timeline --------------------------------- */
.timeline{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:2rem;
  position:relative;
  padding-top:2rem;
}
.timeline::before{
  content:"";
  position:absolute; top:0.55rem; left:0; right:0;
  height:1px; background:var(--line-strong);
}
.timeline-item{ position:relative; padding-top:1.25rem; }
.timeline-item::before{
  content:"";
  position:absolute; top:0; left:0;
  width:9px; height:9px;
  background:var(--accent);
  border-radius:50%;
}
.timeline-item .yr{ font-family:var(--f-mono); font-size:0.82rem; color:var(--accent-deep); }

/* ------------------------------- process steps ------------------------------ */
.process-list{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:2rem 3rem;
}
.process-step{
  display:flex;
  gap:1.25rem;
  padding-top:1.5rem;
  border-top:1px solid var(--line);
}
.step-no{
  font-family:var(--f-mono);
  font-size:1.1rem;
  color:var(--green-deep);
  flex:none;
  padding-top:0.1rem;
}
.process-step h3{ font-size:1.02rem; margin-bottom:0.5rem; }
.process-step p{ font-size:0.92rem; margin-bottom:0; }

/* ------------------------------- certificate block --------------------------- */
.certificate{
  border:1px solid var(--line-strong);
  background:var(--panel);
}
.certificate-head{
  padding:1.5rem 2.5rem;
  border-bottom:1px solid var(--line);
  display:flex; justify-content:space-between; align-items:center;
  flex-wrap:wrap; gap:0.5rem;
}
.certificate-head h3{ margin:0; }
.certificate-head span{ font-family:var(--f-mono); font-size:0.78rem; color:var(--ink-faint); }
.certificate-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
}
.certificate-cell{
  padding:2rem 2.5rem;
  border-left:1px solid var(--line);
}
.certificate-cell:first-child{ border-left:none; }
.certificate-cell h4{
  font-family:var(--f-body);
  font-size:0.8rem;
  color:var(--ink-faint);
  font-weight:600;
  margin:0 0 0.75rem;
}
.certificate-cell .val{
  font-family:var(--f-mono);
  font-size:0.92rem;
  color:var(--ink);
  line-height:1.7;
}

/* -------------------------------- CTA band ---------------------------------- */
.cta-band{
  display:flex; align-items:center; justify-content:space-between;
  gap:2rem; flex-wrap:wrap;
}
.cta-band h2{ margin:0; max-width:20ch; }

/* --------------------------------- footer ----------------------------------- */
.site-footer{
  background:var(--ink-dark);
  color:#A9C2AF;
  padding:4rem 0 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.3fr 1fr 1fr;
  gap:2.5rem;
  padding-bottom:3rem;
  border-bottom:1px solid #1B3B28;
}
.footer-grid h4{
  color:#F2F7F3;
  font-size:0.85rem;
  font-weight:600;
  margin:0 0 0.9rem;
}
.footer-grid p{ margin:0; font-size:0.9rem; color:#9BB5A3; }
.footer-grid .mono{ font-size:0.85rem; color:#A9C2AF; }
.footer-brand{ display:flex; align-items:center; gap:0.75rem; margin-bottom:1rem; }
.footer-logo-chip{
  display:inline-flex; align-items:center;
  background:#fff;
  padding:0.45rem 0.7rem;
  border-radius:2px;
  line-height:0;
}
.footer-logo-chip img{ height:26px; width:auto; display:block; }
.footer-brand .brand-tag{ color:#8FAE99; border-left-color:#2A4C36; }
.footer-bottom{
  padding:1.5rem var(--gutter);
  display:flex; justify-content:space-between; align-items:center;
  flex-wrap:wrap; gap:0.5rem;
  font-size:0.82rem;
  color:#7E9C89;
  max-width:var(--maxw);
  margin:0 auto;
}
.footer-bottom a{ color:var(--accent-dark-bg); }

/* ---------------------------------- forms ------------------------------------ */
.form-panel{
  border:1px solid var(--line-strong);
  background:var(--panel);
  padding:2.5rem;
}
.field{ margin-bottom:1.4rem; }
.field label{
  display:block;
  font-size:0.85rem;
  font-weight:600;
  color:var(--ink);
  margin-bottom:0.4rem;
}
.field .hint{ display:block; font-size:0.78rem; color:var(--ink-faint); margin-top:0.35rem; }
.field input, .field select, .field textarea{
  width:100%;
  padding:0.75rem 0.9rem;
  background:var(--canvas);
  border:1px solid var(--line-strong);
  border-radius:var(--radius);
  font-size:0.95rem;
  color:var(--ink);
}
.field input:focus, .field select:focus, .field textarea:focus{
  outline:none;
  border-color:var(--accent);
  background:var(--panel);
}
.field textarea{ resize:vertical; min-height:100px; }
.form-note{ font-size:0.82rem; color:var(--ink-faint); margin-top:1rem; }

/* -------------------------------- contact page ------------------------------- */
.contact-grid{
  display:grid;
  grid-template-columns:0.85fr 1.15fr;
  gap:2.5rem;
  align-items:start;
}
.contact-info .row{
  display:flex; gap:1rem;
  padding:1.1rem 0;
  border-bottom:1px solid var(--line);
}
.contact-info .row:first-child{ padding-top:0; }
.contact-info .row .k{
  width:9rem; flex:none;
  font-size:0.85rem; color:var(--ink-faint); font-weight:600;
}
.contact-info .row .v{ font-family:var(--f-mono); font-size:0.92rem; color:var(--ink); }
.contact-info .row .v a{ color:var(--ink); }

/* -------------------------------- products page ------------------------------ */
.catalog-hero-stats{
  display:flex; gap:2.5rem; margin-top:2rem; flex-wrap:wrap;
}
.catalog-hero-stats div{ font-family:var(--f-mono); font-size:0.85rem; color:var(--ink-soft); }
.catalog-hero-stats strong{ display:block; font-size:1.6rem; color:var(--ink); font-family:var(--f-display); }

.filter-bar{
  display:flex; justify-content:space-between; align-items:center;
  gap:1.5rem; flex-wrap:wrap;
  margin-bottom:1.75rem;
}
.filter-tabs{ display:flex; gap:0.5rem; flex-wrap:wrap; }
.filter-tabs button{
  font-family:var(--f-body);
  font-size:0.88rem; font-weight:600;
  padding:0.55rem 1rem;
  border:1px solid var(--line-strong);
  background:var(--panel);
  color:var(--ink-soft);
  cursor:pointer;
  border-radius:var(--radius);
  transition:all .15s ease;
}
.filter-tabs button:hover{ border-color:var(--accent); color:var(--ink); }
.filter-tabs button.is-active{
  background:var(--ink); border-color:var(--ink); color:#fff;
}
.search-wrap{ position:relative; }
.search-wrap input{
  width:260px;
  padding:0.6rem 0.9rem;
  border:1px solid var(--line-strong);
  background:var(--panel);
  border-radius:var(--radius);
  font-size:0.9rem;
  color:var(--ink);
}
.search-wrap input:focus{ outline:none; border-color:var(--accent); }

.segment-chips{
  display:flex; gap:0.5rem; flex-wrap:wrap; margin-bottom:2rem;
}
.segment-chips button{
  font-family:var(--f-mono);
  font-size:0.74rem;
  padding:0.35rem 0.7rem;
  border:1px solid var(--line);
  background:transparent;
  color:var(--ink-soft);
  cursor:pointer;
  border-radius:12px;
}
.segment-chips button.is-active{
  border-color:var(--accent-deep);
  color:var(--accent-deep);
  background:var(--accent-pale);
}

.spec-table{ border:1px solid var(--line-strong); background:var(--panel); }
.spec-row{
  display:grid;
  grid-template-columns:3.2rem 2.5fr 1.4fr 1.6fr;
  align-items:center;
  border-bottom:1px solid var(--line);
  padding:0.9rem 1.5rem;
  text-decoration:none;
  color:inherit;
}
a.spec-row{ cursor:pointer; }
a.spec-row:hover{ text-decoration:none; }
a.spec-row:hover .name{ color:var(--blue-deep); }
.spec-row:last-child{ border-bottom:none; }
.spec-row.head{
  font-size:0.76rem;
  text-transform:none;
  color:var(--ink-faint);
  font-weight:600;
  background:var(--surface);
}
.spec-row:not(.head):hover{ background:var(--accent-pale); }
.spec-row .idx{ font-family:var(--f-mono); font-size:0.8rem; color:var(--ink-faint); }
.spec-row .name{ font-weight:600; color:var(--ink); font-size:0.95rem; }
.seg-inline{ display:none; }
.spec-row .cat{ font-size:0.86rem; color:var(--ink-soft); }
.spec-row .seg{ font-family:var(--f-mono); font-size:0.78rem; color:var(--accent-deep); }
.empty-state{
  padding:3rem; text-align:center; color:var(--ink-faint); font-size:0.95rem;
}
.result-bar{
  display:flex; align-items:center; justify-content:space-between;
  margin-bottom:0.75rem;
}
.result-count{ font-family:var(--f-mono); font-size:0.8rem; color:var(--ink-faint); margin:0; }
.clear-filters{
  font-family:var(--f-body);
  font-size:0.82rem;
  font-weight:600;
  color:var(--blue-deep);
  background:none;
  border:none;
  cursor:pointer;
  padding:0;
}
.clear-filters:hover{ text-decoration:underline; text-underline-offset:3px; }
#catalogSection{ scroll-margin-top:88px; }

/* ------------------------------------ responsive ------------------------------ */
@media (max-width: 900px){
  .hero-grid, .doc-split, .category-grid, .contact-grid, .certificate-grid, .footer-grid{
    grid-template-columns:1fr;
  }
  .reason-grid{ grid-template-columns:1fr 1fr; }
  .reason{ border-left:1px solid var(--line); padding-left:1.5rem; border-top:1px solid var(--line); }
  .reason:nth-child(odd){ border-left:none; padding-left:0; }
  .reason:nth-child(-n+2){ border-top:none; }
  .process-list{ grid-template-columns:1fr; }
  .doc-split .doc-col + .doc-col{ border-left:none; border-top:1px solid var(--line); }
  .certificate-cell{ border-left:none; border-top:1px solid var(--line); }
  .certificate-cell:first-child{ border-top:none; }
  .founder{ grid-template-columns:1fr; }
  .founder-mark{ width:110px; height:110px; font-size:2rem; }
  .timeline{ grid-template-columns:1fr; gap:1.5rem; }
  .timeline::before{ display:none; }
  .stat-line{ flex-direction:column; }
  .stat-line .stat{ border-left:none; border-top:1px solid var(--line); }
  .stat-line .stat:first-child{ border-top:none; }
  .spec-row{ grid-template-columns:2.4rem 2fr 1fr; }
  .spec-row .seg{ display:none; }
  .spec-row.head .head-seg{ display:none; }
  .seg-inline{
    display:block;
    font-family:var(--f-mono);
    font-size:0.72rem;
    color:var(--accent-deep);
    font-weight:400;
    margin-top:0.2rem;
  }
  .segment-chips{
    flex-wrap:nowrap;
    overflow-x:auto;
    -webkit-overflow-scrolling:touch;
    scrollbar-width:thin;
    padding-bottom:0.6rem;
  }
  .segment-chips button{ flex:none; white-space:nowrap; }
}
@media (max-width: 720px){
  .reason-grid{ grid-template-columns:1fr; }
  .reason{ border-left:none !important; padding-left:0 !important; }
  .reason:not(:first-child){ border-top:1px solid var(--line); }
  .nav-menu{
    position:absolute; top:100%; left:0; right:0;
    background:var(--panel);
    border-bottom:1px solid var(--line);
    flex-direction:column;
    gap:0;
    padding:0.25rem var(--gutter) 0.5rem;
    display:none;
    box-shadow:0 12px 24px -18px rgba(13,38,24,0.4);
    counter-reset:navitem;
    max-height:calc(100vh - 100%);
    overflow-y:auto;
  }
  .nav-menu.is-open{ display:flex; }
  .nav-menu li{
    counter-increment:navitem;
    border-bottom:1px solid var(--line);
  }
  .nav-menu li:last-child{ border-bottom:none; }
  .nav-menu a{
    display:flex;
    align-items:center;
    gap:1rem;
    width:100%;
    padding:1rem 0.1rem;
    border-bottom:none;
    font-size:1.02rem;
    color:var(--ink);
  }
  .nav-menu a::before{
    content:counter(navitem, decimal-leading-zero);
    font-family:var(--f-mono);
    font-size:0.78rem;
    color:var(--ink-faint);
  }
  .nav-menu a:hover, .nav-menu a:focus-visible{ color:var(--green-deep); }
  .nav-menu a.active{
    color:var(--green-deep);
    font-weight:600;
    background:var(--green-pale);
    border-bottom-color:transparent;
    margin:0 calc(-1 * var(--gutter));
    padding-left:calc(var(--gutter) + 0.1rem);
    padding-right:var(--gutter);
  }
  .nav-menu a.active::before{ color:var(--green-deep); }
  .nav-toggle{
    display:inline-flex;
    flex-direction:column;
    align-items:center; justify-content:center;
    gap:4px;
    width:40px; height:40px;
    border:1px solid var(--line-strong);
    background:transparent;
    cursor:pointer;
    flex:none;
  }
  .nav-toggle:hover{ background:var(--surface); }
  .nav-toggle .bar{
    display:block;
    width:17px; height:2px;
    background:var(--ink);
    transition:transform .2s ease, opacity .2s ease;
  }
  .nav-toggle[aria-expanded="true"] .bar:nth-child(1){ transform:translateY(6px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] .bar:nth-child(2){ opacity:0; }
  .nav-toggle[aria-expanded="true"] .bar:nth-child(3){ transform:translateY(-6px) rotate(-45deg); }
  .cta-band{ flex-direction:column; align-items:flex-start; }
}