/* =========================================================================
   YesterLabs — Industrial reproduction for classic vehicles
   Design system: deep ink + brushed steel + warm copper accent
   Type: IBM Plex Sans Condensed (display) / Plex Sans (body) / Plex Mono (technical)
   ========================================================================= */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@400;500;600;700&family=IBM+Plex+Sans+Condensed:wght@500;600;700&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

:root{
  /* ink / dark — faint olive-green black (brand) */
  --ink:        #0e120b;
  --ink-1:      #141911;
  --ink-2:      #1b2117;
  --ink-3:      #242c1e;

  /* paper / light */
  --paper:      #f2f1ed;
  --paper-2:    #e7e5df;
  --card:       #fbfaf8;

  /* text */
  --t-hi:       #15161a;   /* on paper */
  --t-mid:      #56585e;
  --t-lo:       #8a8c92;
  --t-on-ink:   #ecedef;
  --t-on-ink-mid: #a4a7ad;
  --t-on-ink-lo:  #6f747c;

  /* lines */
  --hair:       rgba(13,15,18,.14);
  --hair-soft:  rgba(13,15,18,.08);
  --hair-d:     rgba(255,255,255,.13);
  --hair-d-soft:rgba(255,255,255,.07);

  /* accent — YesterLab acid lime. Bright lime only reads on dark, so the
     light-surface accent is a deep lime; dark surfaces re-map --accent to --lime. */
  --lime:       #c1e902;
  --lime-hi:    #d1f508;
  --accent:     #c1e902;            /* logo lime — brand green everywhere */
  --accent-hi:  #d1f508;
  --accent-dim: rgba(193,233,2,.16);
  --olive:      #76715f;            /* brand neutral */

  --steel:      #b9bcc1;

  /* type */
  --f-disp: 'IBM Plex Sans Condensed', 'Arial Narrow', sans-serif;
  --f-sans: 'IBM Plex Sans', system-ui, sans-serif;
  --f-mono: 'IBM Plex Mono', ui-monospace, monospace;

  --maxw: 1280px;
  --pad: clamp(20px, 5vw, 64px);

  --ease: cubic-bezier(.2,.7,.2,1);
}

*{ box-sizing:border-box; margin:0; padding:0; }
html{ scroll-behavior:smooth; -webkit-font-smoothing:antialiased; text-rendering:optimizeLegibility; }
body{
  font-family:var(--f-sans);
  background:var(--paper);
  color:var(--t-hi);
  font-size:17px;
  line-height:1.6;
  overflow-x:hidden;
}
img{ display:block; max-width:100%; }
a{ color:inherit; text-decoration:none; }
button{ font:inherit; color:inherit; cursor:pointer; background:none; border:none; }
::selection{ background:var(--accent); color:var(--ink); }

/* ----------------------------------------------------------------- layout */
.wrap{ max-width:var(--maxw); margin-inline:auto; padding-inline:var(--pad); }
.section{ padding-block:clamp(72px,11vw,140px); }
.section--tight{ padding-block:clamp(56px,8vw,96px); }

.ink-bg{ background:var(--ink); color:var(--t-on-ink); }
.ink-bg .t-mid{ color:var(--t-on-ink-mid); }

/* blueprint grid for dark areas */
.grid-bg{ position:relative; }
.grid-bg::before{
  content:""; position:absolute; inset:0; pointer-events:none; z-index:0;
  background-image:
    linear-gradient(var(--hair-d-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--hair-d-soft) 1px, transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:radial-gradient(120% 90% at 50% 0%, #000 35%, transparent 80%);
          mask-image:radial-gradient(120% 90% at 50% 0%, #000 35%, transparent 80%);
}
.grid-bg > *{ position:relative; z-index:1; }

/* ----------------------------------------------------------------- type */
.kicker{
  font-family:var(--f-mono);
  font-size:12px; font-weight:500;
  letter-spacing:.22em; text-transform:uppercase;
  color:var(--t-mid);
  display:inline-flex; align-items:center; gap:10px;
}
.ink-bg .kicker, .kicker--ink{ color:var(--t-on-ink-mid); }
.kicker::before{
  content:""; width:22px; height:1px; background:var(--accent); display:inline-block;
}
.kicker--plain::before{ display:none; }

h1,h2,h3,h4{ font-family:var(--f-disp); font-weight:700; line-height:.98; letter-spacing:-.01em; text-transform:uppercase; }
.display{
  font-family:var(--f-disp); font-weight:700; text-transform:uppercase;
  font-size:clamp(44px, 8.5vw, 124px); line-height:.9; letter-spacing:-.015em;
}
.h-xl{ font-size:clamp(36px,5.2vw,76px); line-height:.94; }
.h-lg{ font-size:clamp(30px,3.6vw,52px); line-height:.98; }
.h-md{ font-size:clamp(22px,2.4vw,32px); line-height:1.02; letter-spacing:0; }
.h-sm{ font-size:clamp(18px,1.6vw,22px); letter-spacing:.01em; }

.lead{ font-size:clamp(18px,1.5vw,22px); line-height:1.5; color:var(--t-mid); font-weight:400; max-width:60ch; }
.ink-bg .lead{ color:var(--t-on-ink-mid); }
.body-lo{ color:var(--t-mid); }
.ink-bg .body-lo{ color:var(--t-on-ink-mid); }
.mono{ font-family:var(--f-mono); }
.accent{ color:var(--accent); }

.measure{ max-width:64ch; }

/* ----------------------------------------------------------------- buttons */
.btn{
  --bg:var(--ink); --fg:#fff; --bd:var(--ink);
  display:inline-flex; align-items:center; gap:12px;
  font-family:var(--f-mono); font-size:13px; font-weight:500;
  letter-spacing:.12em; text-transform:uppercase;
  padding:15px 24px; border:1px solid var(--bd);
  background:var(--bg); color:var(--fg);
  position:relative; transition:.35s var(--ease);
  white-space:nowrap;
}
.btn .arr{ transition:transform .35s var(--ease); }
.btn:hover .arr{ transform:translateX(5px); }
.btn:hover{ background:var(--accent); border-color:var(--accent); color:var(--ink); }
.btn--ghost{ --bg:transparent; --fg:var(--t-hi); --bd:var(--hair); }
.btn--ghost:hover{ color:var(--ink); }
.btn--lt{ --bg:#fff; --fg:var(--ink); --bd:#fff; }
.btn--lt-ghost{ --bg:transparent; --fg:#fff; --bd:var(--hair-d); }
.btn--lt-ghost:hover{ color:var(--ink); }
.btn--sm{ padding:11px 16px; font-size:12px; }
.btn--block{ width:100%; justify-content:center; }

.link-arrow{
  font-family:var(--f-mono); font-size:13px; font-weight:500;
  letter-spacing:.1em; text-transform:uppercase;
  display:inline-flex; align-items:center; gap:10px; color:var(--t-hi);
  border-bottom:1px solid transparent; padding-bottom:2px; transition:.3s var(--ease);
}
.ink-bg .link-arrow{ color:var(--t-on-ink); }
.link-arrow .arr{ color:var(--accent); transition:transform .3s var(--ease); }
.link-arrow:hover{ border-bottom-color:var(--accent); }
.link-arrow:hover .arr{ transform:translateX(5px); }

/* ----------------------------------------------------------------- header */
.site-head{
  position:sticky; top:0; z-index:50;
  background:color-mix(in srgb, var(--paper) 82%, transparent);
  backdrop-filter:blur(14px) saturate(1.2);
  border-bottom:1px solid var(--hair);
  transition:background .3s, border-color .3s;
}
.site-head.on-dark{
  background:color-mix(in srgb, var(--ink) 72%, transparent);
  border-bottom-color:var(--hair-d);
}
.nav{ display:flex; align-items:center; gap:32px; height:74px; }
.nav__logo{ display:flex; align-items:center; height:74px; flex-shrink:0; }
.nav__logo img{ height:30px; width:auto; }
.nav__links{ display:flex; align-items:center; gap:4px; margin-left:auto; }
.nav__links a{
  font-family:var(--f-mono); font-size:12.5px; letter-spacing:.04em;
  padding:9px 13px; color:var(--t-mid); transition:.25s; border-radius:2px;
  position:relative; white-space:nowrap;
}
.on-dark .nav__links a{ color:var(--t-on-ink-mid); }
.nav__links a:hover{ color:var(--t-hi); }
.on-dark .nav__links a:hover{ color:#fff; }
.nav__links a.active{ color:var(--t-hi); }
.on-dark .nav__links a.active{ color:#fff; }
.nav__links a.active::after{
  content:""; position:absolute; left:13px; right:13px; bottom:2px; height:1.5px; background:var(--accent);
}
.nav__cta{ margin-left:8px; display:flex; gap:10px; align-items:center; }
.nav__burger{ display:none; width:42px; height:42px; align-items:center; justify-content:center; }
.nav__burger span{ display:block; width:20px; height:1.5px; background:currentColor; position:relative; transition:.3s; }
.nav__burger span::before,.nav__burger span::after{ content:""; position:absolute; left:0; width:20px; height:1.5px; background:currentColor; transition:.3s; }
.nav__burger span::before{ top:-6px; } .nav__burger span::after{ top:6px; }
.nav.open .nav__burger span{ background:transparent; }
.nav.open .nav__burger span::before{ top:0; transform:rotate(45deg); }
.nav.open .nav__burger span::after{ top:0; transform:rotate(-45deg); }

/* mobile nav drawer */
.mnav{
  position:fixed; inset:74px 0 0; background:var(--ink); color:#fff; z-index:49;
  transform:translateY(-12px); opacity:0; pointer-events:none; transition:.35s var(--ease);
  padding:32px var(--pad); display:flex; flex-direction:column; gap:2px; overflow:auto;
}
.mnav.show{ transform:none; opacity:1; pointer-events:auto; }
.mnav a{ font-family:var(--f-disp); font-size:30px; text-transform:uppercase; padding:12px 0; border-bottom:1px solid var(--hair-d-soft); display:flex; justify-content:space-between; align-items:center; }
.mnav a .n{ font-family:var(--f-mono); font-size:12px; color:var(--t-on-ink-lo); }
.mnav .mnav__cta{ margin-top:24px; display:flex; flex-direction:column; gap:12px; }

/* ----------------------------------------------------------------- footer */
.site-foot{ background:var(--ink); color:var(--t-on-ink); padding-block:clamp(64px,8vw,96px) 40px; }
.foot-top{ display:grid; grid-template-columns:1.4fr 1fr 1fr 1fr; gap:48px; }
.foot-brand img{ height:30px; margin-bottom:24px; }
.foot-brand p{ color:var(--t-on-ink-mid); max-width:34ch; font-size:15px; }
.foot-col h4{ font-family:var(--f-mono); font-weight:500; font-size:12px; letter-spacing:.18em; color:var(--t-on-ink-lo); text-transform:uppercase; margin-bottom:18px; }
.foot-col a{ display:block; color:var(--t-on-ink-mid); padding:7px 0; font-size:15px; transition:.25s; }
.foot-col a:hover{ color:#fff; }
.foot-bar{ margin-top:64px; padding-top:24px; border-top:1px solid var(--hair-d); display:flex; justify-content:space-between; align-items:center; gap:20px; flex-wrap:wrap; }
.foot-bar .mono{ font-size:12px; color:var(--t-on-ink-lo); letter-spacing:.04em; }

/* ----------------------------------------------------------------- placeholders (hatched) */
.ph{
  position:relative; overflow:hidden; background:var(--paper-2);
  background-image:repeating-linear-gradient(135deg, rgba(13,15,18,.05) 0 1px, transparent 1px 9px);
  display:flex; align-items:flex-end; justify-content:flex-start;
}
.ph--d{ background:var(--ink-2); background-image:repeating-linear-gradient(135deg, rgba(255,255,255,.05) 0 1px, transparent 1px 9px); }
.ph__tag{
  font-family:var(--f-mono); font-size:11px; letter-spacing:.08em; text-transform:uppercase;
  color:var(--t-lo); padding:10px 12px; background:color-mix(in srgb, var(--paper) 60%, transparent);
  margin:10px; border:1px solid var(--hair-soft);
}
.ph--d .ph__tag{ color:var(--t-on-ink-lo); background:color-mix(in srgb, var(--ink) 50%, transparent); border-color:var(--hair-d-soft); }
/* corner crop marks */
.crop{ position:relative; }
.crop::before,.crop::after{ content:""; position:absolute; width:14px; height:14px; pointer-events:none; }
.crop::before{ top:10px; left:10px; border-top:1px solid var(--accent); border-left:1px solid var(--accent); }
.crop::after{ bottom:10px; right:10px; border-bottom:1px solid var(--accent); border-right:1px solid var(--accent); }

/* ----------------------------------------------------------------- generic cards */
.card{ background:var(--card); border:1px solid var(--hair); padding:28px; transition:.35s var(--ease); position:relative; }
.card:hover{ border-color:color-mix(in srgb, var(--accent) 50%, var(--hair)); transform:translateY(-3px); }
.ink-bg .card{ background:var(--ink-1); border-color:var(--hair-d); }

/* index number tag used on many lists */
.idx{ font-family:var(--f-mono); font-size:12px; letter-spacing:.1em; color:var(--accent); }

/* ----------------------------------------------------------------- reveal */
[data-reveal]{ opacity:0; transform:translateY(20px); transition:opacity .8s var(--ease), transform .8s var(--ease); }
[data-reveal].in{ opacity:1; transform:none; }
[data-reveal-d="1"]{ transition-delay:.08s; }
[data-reveal-d="2"]{ transition-delay:.16s; }
[data-reveal-d="3"]{ transition-delay:.24s; }
[data-reveal-d="4"]{ transition-delay:.32s; }
[data-reveal-d="5"]{ transition-delay:.40s; }
@media (prefers-reduced-motion:reduce){ [data-reveal]{ opacity:1; transform:none; transition:none; } html{ scroll-behavior:auto; } }

/* ----------------------------------------------------------------- bits */
.divider{ height:1px; background:var(--hair); border:0; }
.ink-bg .divider{ background:var(--hair-d); }
.tick-row{ display:flex; gap:10px; align-items:baseline; }
.tick-row::before{ content:"—"; color:var(--accent); font-family:var(--f-mono); }

.eyebrow-num{ font-family:var(--f-mono); font-size:13px; color:var(--accent); letter-spacing:.1em; }

.pill{
  display:inline-flex; align-items:center; gap:8px; font-family:var(--f-mono);
  font-size:11.5px; letter-spacing:.08em; text-transform:uppercase;
  padding:7px 12px; border:1px solid var(--hair); color:var(--t-mid);
}
.ink-bg .pill{ border-color:var(--hair-d); color:var(--t-on-ink-mid); }
.pill .dot{ width:6px; height:6px; border-radius:50%; background:var(--accent); }

/* responsive */
@media (max-width:1024px){
  .nav__links{ display:none; }
  .nav__cta{ display:none; }
  .nav__burger{ display:flex; }
  .foot-top{ grid-template-columns:1fr 1fr; gap:40px 32px; }
}
@media (max-width:560px){
  body{ font-size:16px; }
  .foot-top{ grid-template-columns:1fr; }
  .foot-brand{ grid-column:auto; }
}