/* ============================================================
   MakerKit3D — Marketing stylesheet (homepage)
   Warm-paper blueprint system. Extends static/css/buildkit.css.
   Color tokens mirror buildkit.css 1:1 — change both if updated.
   See DESIGN.md for the source of truth.
   ============================================================ */

:root{
  /* Backgrounds */
  --mk-paper:#f6f4ee;
  --mk-surface:#ffffff;
  --mk-surface-warm:#fbfaf6;
  /* Ink */
  --mk-ink:#1c1b18;
  --mk-ink-soft:#55534d;
  --mk-ink-muted:#9b988f;
  /* Accent — teal */
  --mk-teal:#0f6e56;
  --mk-teal-dark:#0c4a3b;
  --mk-teal-soft:#e1f5ee;
  --mk-teal-hover:#0d5f49;
  /* Pencil-mark highlight */
  --mk-amber:#a85a00;
  /* Lines */
  --mk-hairline:#d8d4c8;
  --mk-divider:#e7e3d8;
  /* Type */
  --mk-sans:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --mk-display:"Archivo",var(--mk-sans);
  --mk-display-x:"Archivo Expanded","Archivo",var(--mk-sans);
  --mk-mono:"IBM Plex Mono",ui-monospace,"SFMono-Regular",Menlo,monospace;
  /* Geometry */
  --mk-max:1120px;
  --mk-radius:7px;
}

*,*::before,*::after{box-sizing:border-box}

.mk-body{
  margin:0;
  background:var(--mk-paper);
  color:var(--mk-ink);
  font-family:var(--mk-sans);
  font-size:17px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
.mk-body img{max-width:100%;display:block}
.mk-wrap{max-width:var(--mk-max);margin:0 auto;padding:0 32px}
a{color:var(--mk-teal)}

/* ── Shared atoms ──────────────────────────── */
.mk-eyebrow{
  font-family:var(--mk-mono);font-size:12px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--mk-ink-muted);
}
.mk-mono{font-family:var(--mk-mono)}

.mk-btn{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--mk-sans);font-weight:600;font-size:15px;
  line-height:1;padding:13px 22px;border-radius:var(--mk-radius);
  border:1px solid var(--mk-teal);background:var(--mk-teal);color:#fff;
  cursor:pointer;text-decoration:none;transition:background .15s,border-color .15s;
}
.mk-btn:hover{background:var(--mk-teal-hover);border-color:var(--mk-teal-hover);color:#fff}
.mk-btn--ghost{background:transparent;color:var(--mk-teal)}
.mk-btn--ghost:hover{background:var(--mk-teal-soft);color:var(--mk-teal-dark)}
.mk-btn--lg{font-size:17px;padding:16px 30px}
.mk-btn--onink{border-color:#fff;background:#fff;color:var(--mk-ink)}
.mk-btn--onink:hover{background:var(--mk-teal-soft);border-color:var(--mk-teal-soft);color:var(--mk-ink)}

.mk-textlink{
  display:inline-flex;align-items:center;gap:7px;font-weight:600;
  color:var(--mk-ink-soft);text-decoration:none;
}
.mk-textlink:hover{color:var(--mk-teal)}
.mk-textlink svg{transition:transform .15s}
.mk-textlink:hover svg{transform:translateX(3px)}

/* ── Title block ───────────────────────────── */
.mk-titleblock{
  display:inline-grid;border:1px solid var(--mk-hairline);
  background:var(--mk-surface);
}
.mk-titleblock--3{grid-template-columns:repeat(3,minmax(64px,auto))}
.mk-titleblock--6{grid-template-columns:repeat(3,minmax(64px,auto))}
.mk-tbcell{
  border-right:1px solid var(--mk-hairline);
  border-bottom:1px solid var(--mk-hairline);padding:7px 13px;
}
.mk-titleblock--3 .mk-tbcell:nth-child(3n){border-right:none}
.mk-titleblock--3 .mk-tbcell:nth-last-child(-n+3){border-bottom:none}
.mk-titleblock--6 .mk-tbcell:nth-child(3n){border-right:none}
.mk-titleblock--6 .mk-tbcell:nth-last-child(-n+3){border-bottom:none}
.mk-tbk{
  font-family:var(--mk-mono);font-size:10px;letter-spacing:.12em;
  text-transform:uppercase;color:var(--mk-ink-muted);
}
.mk-tbv{font-family:var(--mk-mono);font-size:15px;font-weight:600;color:var(--mk-ink)}
.mk-titleblock--ink{background:transparent;border-color:rgba(143,185,173,.5)}
.mk-titleblock--ink .mk-tbcell{border-color:rgba(143,185,173,.5)}
.mk-titleblock--ink .mk-tbk{color:#8fb9ad}
.mk-titleblock--ink .mk-tbv{color:var(--mk-teal-soft)}

/* ── Dimension line ────────────────────────── */
.mk-dim{display:flex;align-items:center;color:var(--mk-teal)}
.mk-dim__bar{flex:1;height:1px;background:currentColor;position:relative}
.mk-dim__bar::before,.mk-dim__bar::after{
  content:"";position:absolute;top:50%;width:7px;height:7px;
  border-top:1px solid currentColor;border-right:1px solid currentColor;
}
.mk-dim__bar::before{left:0;transform:translateY(-50%) rotate(-135deg)}
.mk-dim__bar::after{right:0;transform:translateY(-50%) rotate(45deg)}
.mk-dim__tag{
  font-family:var(--mk-mono);font-size:11px;letter-spacing:.1em;
  text-transform:uppercase;padding:0 14px;white-space:nowrap;
}

/* ── Page header strip ─────────────────────── */
.mk-strip{
  background:var(--mk-ink);color:#cfcabf;
  font-family:var(--mk-mono);font-size:11px;letter-spacing:.14em;
  text-transform:uppercase;
}
.mk-strip .mk-wrap{padding-top:9px;padding-bottom:9px}

/* ── Nav ───────────────────────────────────── */
.mk-nav{
  background:var(--mk-surface);border-bottom:1px solid var(--mk-hairline);
  position:sticky;top:0;z-index:50;
}
.mk-nav .mk-wrap{display:flex;align-items:center;gap:22px;height:64px}
.mk-brand{
  font-family:var(--mk-display-x);font-weight:800;font-size:20px;
  letter-spacing:-.01em;color:var(--mk-ink);text-decoration:none;
}
.mk-brand b{color:var(--mk-teal)}
.mk-nav__links{display:flex;align-items:center;gap:22px}
.mk-nav__link{color:var(--mk-ink-soft);font-size:15px;font-weight:500;text-decoration:none}
.mk-nav__link:hover{color:var(--mk-teal)}
.mk-nav__spacer{flex:1}
.mk-nav__right{display:flex;align-items:center;gap:16px}
.mk-nav__logout{background:none;border:none;padding:0;font:inherit;color:var(--mk-ink-soft);font-weight:500;cursor:pointer}
.mk-nav__logout:hover{color:var(--mk-teal)}
.mk-nav__toggle{display:none;background:none;border:1px solid var(--mk-hairline);border-radius:6px;padding:7px 9px;cursor:pointer}
.mk-nav__toggle span{display:block;width:20px;height:2px;background:var(--mk-ink);margin:4px 0}

/* ── Hero ──────────────────────────────────── */
.mk-hero{padding:78px 0 64px}
.mk-hero__grid{display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:center}
.mk-hero h1{
  font-family:var(--mk-display-x);font-weight:800;font-size:60px;
  line-height:1.02;letter-spacing:-.02em;margin:16px 0 0;color:var(--mk-ink);
}
.mk-hero h1 .mk-hl{color:var(--mk-teal)}
.mk-hero__sub{font-size:19px;color:var(--mk-ink-soft);max-width:31em;margin:22px 0 30px}
.mk-hero__cta{display:flex;align-items:center;gap:22px;flex-wrap:wrap}
.mk-hero__tb{margin-top:34px}

/* Drawing sheet */
.mk-sheet{
  background:var(--mk-surface);border:1px solid var(--mk-hairline);
  box-shadow:0 1px 0 var(--mk-hairline),0 22px 48px -30px rgba(28,27,24,.45);
  padding:26px;position:relative;
}
.mk-sheet__tb{position:absolute;right:18px;bottom:18px}
.mk-sheet svg{width:100%;height:auto}

/* ── CAD tools strip ───────────────────────── */
.mk-tools{border-top:1px solid var(--mk-hairline);border-bottom:1px solid var(--mk-hairline);background:var(--mk-surface-warm)}
.mk-tools .mk-wrap{display:flex;align-items:center;gap:30px;padding-top:22px;padding-bottom:22px;flex-wrap:wrap}
.mk-tools__label{font-family:var(--mk-mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--mk-ink-muted);white-space:nowrap}
.mk-tools__list{display:flex;align-items:center;gap:34px;flex-wrap:wrap}
.mk-tools__item{font-family:var(--mk-display);font-weight:600;font-size:17px;color:var(--mk-ink-soft)}

/* ── Sections ──────────────────────────────── */
.mk-section{padding:72px 0}
.mk-sechead{display:flex;align-items:baseline;gap:18px;margin-bottom:38px;flex-wrap:wrap}
.mk-sechead h2{
  font-family:var(--mk-display-x);font-weight:700;font-size:34px;
  letter-spacing:-.015em;margin:0;color:var(--mk-ink);
}

/* ── Blueprint panel (how it works) ────────── */
.mk-blueprint{background:var(--mk-ink);color:#efece4}
.mk-blueprint .mk-sechead h2{color:#fff}
.mk-blueprint .mk-eyebrow{color:#8fb9ad}
.mk-steps{display:grid;grid-template-columns:repeat(3,1fr);gap:0}
.mk-step{padding:6px 28px 6px 0;position:relative}
.mk-step+.mk-step{padding-left:28px;border-left:1px dashed rgba(143,185,173,.4)}
.mk-stepnum{display:inline-grid;grid-template-columns:auto auto;border:1px solid rgba(143,185,173,.5)}
.mk-stepnum__n{font-family:var(--mk-mono);font-weight:600;font-size:22px;color:var(--mk-teal-soft);padding:6px 13px;border-right:1px solid rgba(143,185,173,.5)}
.mk-stepnum__l{font-family:var(--mk-mono);font-size:10px;letter-spacing:.12em;text-transform:uppercase;color:#8fb9ad;padding:0 13px;display:flex;align-items:center}
.mk-step h3{font-family:var(--mk-display);font-weight:700;font-size:20px;margin:18px 0 8px;color:#fff}
.mk-step p{color:#c7c3b8;font-size:15px;margin:0}
.mk-blueprint__dim{margin:34px 0 4px}
.mk-blueprint__dim .mk-dim__tag{color:#8fb9ad}
.mk-blueprint__dim .mk-dim{color:rgba(143,185,173,.6)}

/* ── Feature rows ──────────────────────────── */
.mk-feature{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;padding:38px 0}
.mk-feature+.mk-feature{border-top:1px solid var(--mk-divider)}
.mk-feature--flip .mk-feature__media{order:-1}
.mk-feature h3{font-family:var(--mk-display);font-weight:700;font-size:26px;line-height:1.18;letter-spacing:-.01em;margin:14px 0 12px;max-width:16em}
.mk-feature h3 .mk-amber{color:var(--mk-amber)}
.mk-feature p{color:var(--mk-ink-soft);max-width:34em;margin:0 0 18px}
.mk-card{background:var(--mk-surface);border:1px solid var(--mk-hairline);padding:22px}
.mk-shot{background:var(--mk-surface-warm);border:1px solid var(--mk-divider);border-radius:6px;padding:18px}
.mk-shot svg{width:100%;height:auto}
.mk-callout{display:flex;justify-content:space-between;margin-top:10px;font-family:var(--mk-mono);font-size:11px;color:var(--mk-teal);letter-spacing:.06em}

/* ── Sample CTA card ───────────────────────── */
.mk-sample{background:var(--mk-teal-soft);border:1px solid var(--mk-teal);border-radius:10px;padding:34px 36px;display:flex;align-items:center;gap:28px;flex-wrap:wrap}
.mk-sample h3{font-family:var(--mk-display-x);font-weight:700;font-size:24px;margin:0;color:var(--mk-teal-dark)}
.mk-sample p{margin:6px 0 0;color:var(--mk-ink-soft)}
.mk-sample__spacer{flex:1}

/* ── FAQ ───────────────────────────────────── */
.mk-faq{max-width:820px}
.mk-faq details{border-bottom:1px solid var(--mk-divider)}
.mk-faq summary{
  list-style:none;cursor:pointer;padding:20px 36px 20px 0;position:relative;
  font-family:var(--mk-display);font-weight:600;font-size:18px;color:var(--mk-ink);
}
.mk-faq summary::-webkit-details-marker{display:none}
.mk-faq summary::after{
  content:"+";position:absolute;right:4px;top:18px;
  font-family:var(--mk-mono);font-size:22px;color:var(--mk-teal);font-weight:400;
}
.mk-faq details[open] summary::after{content:"–"}
.mk-faq__body{padding:0 0 22px;color:var(--mk-ink-soft)}
.mk-faq__body ul{margin:8px 0;padding-left:20px}
.mk-faq__body code{font-family:var(--mk-mono);font-size:13px;background:var(--mk-surface-warm);border:1px solid var(--mk-divider);border-radius:4px;padding:1px 5px}

/* ── Final CTA ─────────────────────────────── */
.mk-cta{text-align:left}
.mk-cta h2{font-family:var(--mk-display-x);font-weight:800;font-size:42px;letter-spacing:-.02em;margin:0 0 14px;max-width:14em}
.mk-cta h2 .mk-hl{color:var(--mk-teal)}
.mk-cta p{color:var(--mk-ink-soft);font-size:18px;margin:0 0 26px}

/* ── Footer ────────────────────────────────── */
.mk-footer{background:var(--mk-surface-warm);border-top:1px solid var(--mk-hairline);padding:54px 0 28px}
.mk-footer__top{display:flex;justify-content:space-between;gap:40px;flex-wrap:wrap}
.mk-footer__brand{max-width:24em}
.mk-footer__brand p{color:var(--mk-ink-soft);margin:12px 0 0}
.mk-footer__cols{display:flex;gap:56px;flex-wrap:wrap}
.mk-footer__col h4{font-family:var(--mk-mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--mk-ink-muted);margin:0 0 14px}
.mk-footer__col ul{list-style:none;margin:0;padding:0}
.mk-footer__col li{margin:0 0 9px}
.mk-footer__col a{color:var(--mk-ink-soft);text-decoration:none;font-size:15px}
.mk-footer__col a:hover{color:var(--mk-teal)}
.mk-news{margin-top:14px;max-width:24em}
.mk-news label{font-family:var(--mk-mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--mk-ink-muted);display:block;margin-bottom:8px}
.mk-news__group{display:flex;gap:8px}
.mk-news__group input{flex:1;font:inherit;font-size:15px;padding:11px 13px;border:1px solid var(--mk-hairline);border-radius:var(--mk-radius);background:var(--mk-surface);color:var(--mk-ink)}
.mk-news__group input:focus{outline:none;border-color:var(--mk-teal);box-shadow:0 0 0 3px rgba(15,110,86,.18)}
.mk-news__status{font-size:13px;margin-top:8px;min-height:18px}
.mk-news__status.success{color:var(--mk-teal)}
.mk-news__status.error{color:var(--mk-amber)}
.mk-footer__legal{display:flex;justify-content:space-between;align-items:center;border-top:1px solid var(--mk-divider);margin-top:40px;padding-top:20px;flex-wrap:wrap;gap:12px}
.mk-footer__legal p{margin:0;font-family:var(--mk-mono);font-size:12px;color:var(--mk-ink-muted)}

/* ── Reveal on scroll (progressive enhancement) ──
   Content is fully visible by default. Only when JS adds .mk-js to
   <html> do elements start hidden and animate in. No JS / no observer
   / reduced-motion = everything visible, nothing lost. */
.mk-js .mk-reveal{opacity:0;transform:translateY(14px);transition:opacity .6s ease,transform .6s ease}
.mk-js .mk-reveal.mk-in{opacity:1;transform:none}
.mk-js .mk-dim__bar{transition:transform .9s ease}
.mk-js .mk-reveal .mk-dim__bar{transform:scaleX(0);transform-origin:left}
.mk-js .mk-reveal.mk-in .mk-dim__bar{transform:scaleX(1)}
@media(prefers-reduced-motion:reduce){
  .mk-js .mk-reveal{opacity:1;transform:none;transition:none}
  .mk-js .mk-reveal .mk-dim__bar{transform:none}
}

/* ── Page head (interior pages) ────────────── */
.mk-pagehead{padding:56px 0 12px}
.mk-pagehead h1{
  font-family:var(--mk-display-x);font-weight:800;font-size:46px;
  letter-spacing:-.02em;margin:14px 0 0;color:var(--mk-ink);
}
.mk-pagehead__meta{margin-top:20px}

/* ── Long-form prose (terms / privacy / content) ── */
.mk-prose{max-width:760px;padding:24px 0 64px;color:var(--mk-ink-soft);font-size:16px;line-height:1.75}
.mk-prose h2{font-family:var(--mk-display);font-weight:700;font-size:20px;color:var(--mk-ink);margin:34px 0 10px}
.mk-prose h3{font-family:var(--mk-display);font-weight:600;font-size:17px;color:var(--mk-ink);margin:26px 0 8px}
.mk-prose p{margin:0 0 16px}
.mk-prose a{color:var(--mk-teal)}
.mk-prose strong{color:var(--mk-ink)}
.mk-prose .mk-updated{font-family:var(--mk-mono);font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:var(--mk-ink-muted)}

/* ── Auth (login / signup) ─────────────────── */
.mk-auth{padding:56px 0 72px}
.mk-auth__grid{
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);
  gap:48px;align-items:start;max-width:980px;margin:0 auto;
}
.mk-auth__card{
  background:var(--mk-surface);border:1px solid var(--mk-hairline);
  border-radius:var(--mk-radius);padding:38px 40px;
}
.mk-auth__card h1{
  font-family:var(--mk-display-x);font-weight:800;font-size:34px;
  letter-spacing:-.02em;margin:14px 0 0;color:var(--mk-ink);
}
.mk-auth__sub{margin:10px 0 0;color:var(--mk-ink-soft);font-size:16px}
.mk-auth__form{margin-top:28px}
.mk-field{margin:0 0 18px}
.mk-field>label{
  display:block;font-family:var(--mk-mono);font-size:11px;letter-spacing:.12em;
  text-transform:uppercase;color:var(--mk-ink-muted);margin-bottom:7px;
}
.mk-auth__card input[type=text],
.mk-auth__card input[type=email],
.mk-auth__card input[type=password]{
  width:100%;font:inherit;font-size:16px;padding:12px 14px;
  border:1px solid var(--mk-hairline);border-radius:var(--mk-radius);
  background:var(--mk-surface-warm);color:var(--mk-ink);
}
.mk-auth__card input:focus{
  outline:none;border-color:var(--mk-teal);background:var(--mk-surface);
  box-shadow:0 0 0 3px rgba(15,110,86,.18);
}
.mk-auth__submit{width:100%;justify-content:center;margin-top:6px}
.mk-field .helptext,.mk-field ul.errorlist{
  font-size:13px;margin:6px 0 0;padding:0;list-style:none;color:var(--mk-ink-muted);
}
.mk-field ul.errorlist{color:var(--mk-amber)}
.mk-auth__alt{
  margin-top:22px;padding-top:18px;border-top:1px solid var(--mk-divider);
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:15px;color:var(--mk-ink-soft);
}
.mk-auth__alt a{font-weight:600;text-decoration:none}
.mk-auth__alt a:hover{text-decoration:underline}
.mk-alert{
  border:1px solid var(--mk-hairline);border-left:3px solid var(--mk-teal);
  background:var(--mk-teal-soft);border-radius:var(--mk-radius);
  padding:13px 16px;margin:0 0 20px;font-size:14px;color:var(--mk-teal-dark);
}
.mk-alert--warn{border-left-color:var(--mk-amber);background:#fbf2e6;color:var(--mk-amber)}
.mk-alert--error{border-left-color:var(--mk-amber);background:#fbecea;color:var(--mk-amber)}
.mk-alert a{color:inherit;font-weight:600}
.mk-alert p{margin:0 0 6px}.mk-alert p:last-child{margin:0}
.mk-alert__resend{
  display:inline-block;margin-top:8px;font-family:var(--mk-mono);font-size:12px;
  letter-spacing:.06em;text-transform:uppercase;
}
/* Right-rail spec panel — the "it makes paper" brand tell */
.mk-auth__aside{position:sticky;top:24px}
.mk-auth__sheet{
  background:var(--mk-surface);border:1px solid var(--mk-hairline);
  border-radius:var(--mk-radius);padding:22px 22px 18px;
}
.mk-auth__sheet svg{width:100%;height:auto}
.mk-auth__notes{
  margin:18px 0 0;padding:0;list-style:none;
  font-family:var(--mk-mono);font-size:12px;line-height:1.7;color:var(--mk-ink-muted);
}
.mk-auth__notes li{padding-left:16px;position:relative}
.mk-auth__notes li::before{content:"·";position:absolute;left:4px;color:var(--mk-teal)}

/* ── Responsive ────────────────────────────── */
@media(max-width:900px){
  .mk-auth__grid{grid-template-columns:1fr;gap:34px;max-width:520px}
  .mk-auth__aside{position:static}
  .mk-hero__grid,.mk-feature,.mk-steps,.mk-cta-grid{grid-template-columns:1fr;gap:30px}
  .mk-hero h1{font-size:42px}
  .mk-cta h2{font-size:32px}
  .mk-feature--flip .mk-feature__media{order:0}
  .mk-step+.mk-step{border-left:none;padding-left:0;padding-top:8px}
  .mk-sechead h2{font-size:28px}
}
@media(max-width:760px){
  .mk-wrap{padding:0 20px}
  .mk-nav__links,.mk-nav__right{display:none}
  .mk-nav__toggle{display:block}
  .mk-nav.mk-nav--open .mk-nav__links,
  .mk-nav.mk-nav--open .mk-nav__right{
    display:flex;flex-direction:column;align-items:flex-start;gap:14px;
    position:absolute;top:64px;left:0;right:0;background:var(--mk-surface);
    border-bottom:1px solid var(--mk-hairline);padding:18px 20px;
  }
  .mk-hero{padding:48px 0 44px}
  .mk-section{padding:52px 0}
}