/* ===========================================================
   Ancient of Ruins — site stylesheet
   Direction: excavated basalt + oxidised brass + lichen.
   Type: carved Roman capitals (Marcellus SC) against an
   instrument-panel grotesk (Barlow) and mono data (JetBrains).
   Signature: the altimeter rail — scroll position read as altitude.
   =========================================================== */

:root{
  /* stone */
  --basalt:      #101317;
  --basalt-deep: #090b0d;
  --slab:        #171b21;
  --slab-hi:     #212832;
  --line:        #2a323c;
  --line-soft:   #1e242c;

  /* plaster register */
  --plaster:     #d9d3c2;
  --plaster-2:   #cbc4b0;
  --plaster-ink: #23262a;

  /* text */
  --chalk:   #e4e0d4;
  --ash:     #93959c;
  --ash-dim: #63666d;

  /* accents */
  --brass:     #c68d47;
  --brass-dim: #8a6231;
  --lichen:    #7d9668;
  --verdigris: #4f958a;
  --rust:      #b0533b;

  --rail: 78px;
  --gut: clamp(20px, 4vw, 56px);
  --maxw: 1220px;

  --f-carve: 'Marcellus SC', 'Palatino Linotype', serif;
  --f-ui: 'Barlow', system-ui, -apple-system, sans-serif;
  --f-data: 'JetBrains Mono', ui-monospace, Menlo, monospace;

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

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

html{ scroll-behavior:smooth; }
@media (prefers-reduced-motion:reduce){ html{ scroll-behavior:auto; } }

body{
  margin:0;
  background:var(--basalt);
  color:var(--chalk);
  font-family:var(--f-ui);
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

/* grain — one shared texture layer, never repeated per-section */
body::before{
  content:"";
  position:fixed; inset:0; z-index:0; pointer-events:none;
  opacity:.05;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)'/%3E%3C/svg%3E");
}

img{ max-width:100%; display:block; }
a{ color:inherit; }

:focus-visible{
  outline:2px solid var(--brass);
  outline-offset:3px;
}

/* ---------- shell ---------- */

.shell{ padding-left:var(--rail); position:relative; z-index:1; }
.wrap{ max-width:var(--maxw); margin:0 auto; padding:0 var(--gut); }

/* ---------- altimeter rail (signature) ---------- */

.alt{
  position:fixed; left:0; top:0; bottom:0; width:var(--rail);
  z-index:60;
  background:var(--basalt-deep);
  border-right:1px solid var(--line-soft);
  display:flex; flex-direction:column; justify-content:space-between;
  align-items:center;
  padding:18px 0;
}

.alt__mark{
  font-family:var(--f-carve);
  font-size:15px; letter-spacing:.16em; color:var(--brass);
  text-decoration:none;
}

/* the tape */
.alt__tape{
  position:relative; flex:1; width:100%;
  margin:22px 0;
  background:
    repeating-linear-gradient(to bottom,
      var(--line) 0 1px, transparent 1px 14px);
  background-position:right 14px top 0;
  background-size:16px 100%;
  background-repeat:repeat-y;
}
.alt__tape::after{
  content:"";
  position:absolute; right:13px; top:0; bottom:0;
  border-right:1px solid var(--line);
}

/* needle */
.alt__needle{
  position:absolute; right:0; left:6px; top:0;
  border-top:1px solid var(--brass);
  transform:translateY(0);
  will-change:transform;
}
.alt__needle::before{
  content:"";
  position:absolute; right:-1px; top:-3px;
  width:5px; height:5px; background:var(--brass);
  clip-path:polygon(100% 0, 100% 100%, 0 50%);
}

.alt__read{
  font-family:var(--f-data);
  font-size:9px; letter-spacing:.06em;
  color:var(--brass);
  position:absolute; left:6px; top:0;
  transform:translateY(-14px);
  will-change:transform;
  background:var(--basalt-deep);
  padding:1px 2px;
}

.alt__foot{
  writing-mode:vertical-rl; transform:rotate(180deg);
  font-family:var(--f-data); font-size:9px;
  letter-spacing:.28em; color:var(--ash-dim);
  text-transform:uppercase;
}

/* mobile: rail collapses to a top progress hairline */
.alt__bar{ display:none; }

@media (max-width:900px){
  :root{ --rail:0px; }
  .alt{
    inset:0 0 auto 0; width:100%; height:auto; bottom:auto;
    flex-direction:row; justify-content:space-between;
    padding:10px 16px; border-right:0;
    border-bottom:1px solid var(--line-soft);
  }
  .alt__tape,.alt__foot{ display:none; }
  .alt__bar{
    display:block; position:absolute; left:0; bottom:-1px; height:1px;
    background:var(--brass); width:0;
  }
  .alt__read{ position:static; transform:none; background:none; }
}

/* ---------- nav ---------- */

.nav{
  position:sticky; top:0; z-index:50;
  background:color-mix(in srgb, var(--basalt) 88%, transparent);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line-soft);
}
@media (max-width:900px){ .nav{ top:41px; } }

.nav__in{
  max-width:var(--maxw); margin:0 auto; padding:0 var(--gut);
  height:62px; display:flex; align-items:center; gap:8px;
}

.nav__word{
  font-family:var(--f-carve); font-size:16px; letter-spacing:.14em;
  text-decoration:none; color:var(--chalk); margin-right:auto;
}
.nav__word span{ color:var(--brass); }

.nav__links{ display:flex; gap:4px; align-items:center; }

.nav__a{
  font-size:11px; text-transform:uppercase; letter-spacing:.18em;
  font-weight:600; color:var(--ash); text-decoration:none;
  padding:8px 12px; position:relative;
}
.nav__a:hover{ color:var(--chalk); }
.nav__a[aria-current="page"]{ color:var(--chalk); }
.nav__a[aria-current="page"]::after{
  content:""; position:absolute; left:12px; right:12px; bottom:2px;
  border-bottom:1px solid var(--brass);
}

.nav__cta{
  font-family:var(--f-ui); font-size:11px; font-weight:600;
  text-transform:uppercase; letter-spacing:.18em;
  text-decoration:none; color:var(--basalt-deep);
  background:var(--brass); padding:10px 16px; margin-left:10px;
  clip-path:polygon(6px 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%, 0 6px);
}
.nav__cta:hover{ background:var(--chalk); }

.nav__burger{
  display:none; background:none; border:1px solid var(--line);
  color:var(--chalk); width:38px; height:34px; cursor:pointer;
}

@media (max-width:820px){
  .nav__burger{ display:block; margin-left:auto; }
  .nav__word{ margin-right:0; }
  .nav__links{
    position:absolute; left:0; right:0; top:62px;
    background:var(--basalt-deep); border-bottom:1px solid var(--line);
    flex-direction:column; align-items:stretch; padding:8px;
    display:none;
  }
  .nav__links.is-open{ display:flex; }
  .nav__a{ padding:12px; }
  .nav__cta{ margin:8px 0 4px; text-align:center; }
}

/* ---------- type ---------- */

.eyebrow{
  font-family:var(--f-data); font-size:10px; letter-spacing:.26em;
  text-transform:uppercase; color:var(--brass-dim); margin:0 0 14px;
}

.h1{
  font-family:var(--f-carve); font-weight:400;
  font-size:clamp(38px,6.4vw,78px); line-height:.98;
  letter-spacing:.02em; margin:0 0 18px;
}
.h2{
  font-family:var(--f-carve); font-weight:400;
  font-size:clamp(24px,3vw,38px); line-height:1.1;
  letter-spacing:.04em; margin:0 0 14px;
}
.h3{
  font-family:var(--f-ui); font-weight:600; font-size:17px;
  letter-spacing:.01em; margin:0 0 8px; color:var(--chalk);
}
.lede{
  font-size:clamp(16px,1.5vw,19px); color:var(--ash);
  max-width:56ch; margin:0 0 26px;
}
p{ margin:0 0 14px; }
.muted{ color:var(--ash); }
.mono{ font-family:var(--f-data); }

/* ---------- sections ---------- */

.sec{ padding:clamp(56px,8vw,110px) 0; border-top:1px solid var(--line-soft); }
.sec--flush{ border-top:0; }

.sec__head{
  display:grid; grid-template-columns:minmax(0,180px) minmax(0,1fr);
  gap:clamp(16px,4vw,48px); align-items:start;
  margin-bottom:44px;
}
.sec__num{
  font-family:var(--f-data); font-size:10px; letter-spacing:.24em;
  color:var(--ash-dim); text-transform:uppercase;
  padding-top:8px; border-top:1px solid var(--line);
}
@media (max-width:760px){
  .sec__head{ grid-template-columns:1fr; }
}

/* ---------- hero ---------- */

.hero{
  position:relative; overflow:hidden;
  border-bottom:1px solid var(--line-soft);
}
/* ground → sky: the page begins at the floor of the world */
.hero::before{
  content:""; position:absolute; inset:0;
  background:
    radial-gradient(120% 90% at 78% 6%, rgba(198,141,71,.16), transparent 58%),
    linear-gradient(to bottom, #131920 0%, #0f1318 46%, var(--basalt) 100%);
}
.hero__grid{
  position:absolute; inset:0; opacity:.5;
  background-image:
    linear-gradient(to right, var(--line-soft) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line-soft) 1px, transparent 1px);
  background-size:96px 96px;
  mask-image:linear-gradient(to bottom, rgba(0,0,0,.8), transparent 78%);
}
.hero__in{
  position:relative;
  max-width:var(--maxw); margin:0 auto; padding:clamp(64px,9vw,120px) var(--gut) clamp(48px,6vw,72px);
  display:grid; grid-template-columns:minmax(0,1.35fr) minmax(0,.65fr);
  gap:clamp(28px,5vw,64px); align-items:end;
}
@media (max-width:900px){ .hero__in{ grid-template-columns:1fr; align-items:start; } }

.hero .h1 span{ color:var(--brass); }

/* ---------- buttons ---------- */

.btn{
  display:inline-flex; align-items:center; gap:10px;
  font-family:var(--f-ui); font-size:12px; font-weight:600;
  text-transform:uppercase; letter-spacing:.18em;
  text-decoration:none; cursor:pointer;
  padding:14px 22px; border:1px solid var(--line);
  background:transparent; color:var(--chalk);
  clip-path:polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
  transition:background .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease);
}
.btn:hover{ border-color:var(--brass); color:var(--brass); }
.btn--solid{ background:var(--brass); color:var(--basalt-deep); border-color:var(--brass); }
.btn--solid:hover{ background:var(--chalk); border-color:var(--chalk); color:var(--basalt-deep); }
.btn--wide{ width:100%; justify-content:center; }
.btn__note{
  font-family:var(--f-data); font-size:10px; letter-spacing:.1em;
  text-transform:none; opacity:.7; font-weight:400;
}
.btns{ display:flex; flex-wrap:wrap; gap:12px; }

/* ---------- panel / cards ---------- */

.panel{
  background:var(--slab);
  border:1px solid var(--line);
  padding:20px;
  position:relative;
}
/* corner brackets — reads as a survey marker, not a rounded card */
.panel::before,.panel::after{
  content:""; position:absolute; width:9px; height:9px;
  border-color:var(--brass-dim); border-style:solid;
}
.panel::before{ top:-1px; left:-1px; border-width:1px 0 0 1px; }
.panel::after{ bottom:-1px; right:-1px; border-width:0 1px 1px 0; }

.panel__title{
  font-family:var(--f-data); font-size:10px; letter-spacing:.22em;
  text-transform:uppercase; color:var(--ash-dim);
  margin:0 0 14px; padding-bottom:10px; border-bottom:1px solid var(--line);
}

/* status readout */
.stat{
  display:flex; justify-content:space-between; align-items:baseline;
  gap:12px; padding:7px 0; border-bottom:1px dotted var(--line);
  font-family:var(--f-data); font-size:12px;
}
.stat:last-child{ border-bottom:0; }
.stat dt{ color:var(--ash-dim); letter-spacing:.06em; }
.stat dd{ margin:0; color:var(--chalk); }
.stat dd b{ color:var(--brass); font-weight:400; }

.dot{
  display:inline-block; width:6px; height:6px; margin-right:7px;
  background:var(--lichen); border-radius:50%;
  box-shadow:0 0 0 3px rgba(125,150,104,.16);
}
.dot--down{ background:var(--rust); box-shadow:0 0 0 3px rgba(176,83,59,.16); }

/* grid of cards */
.grid{ display:grid; gap:1px; background:var(--line-soft); border:1px solid var(--line-soft); }
.grid--3{ grid-template-columns:repeat(3,minmax(0,1fr)); }
.grid--2{ grid-template-columns:repeat(2,minmax(0,1fr)); }
@media (max-width:860px){ .grid--3{ grid-template-columns:1fr 1fr; } }
@media (max-width:620px){ .grid--3,.grid--2{ grid-template-columns:1fr; } }

.cell{ background:var(--basalt); padding:26px 22px; }
.cell:hover{ background:var(--slab); }
.cell__k{
  font-family:var(--f-data); font-size:10px; letter-spacing:.22em;
  color:var(--brass-dim); text-transform:uppercase; margin:0 0 12px;
}
.cell p{ color:var(--ash); font-size:14.5px; margin:0; }

/* ---------- plaster register (light block) ---------- */

.plaster{
  background:var(--plaster);
  color:var(--plaster-ink);
  border-top:1px solid var(--line-soft);
  border-bottom:1px solid var(--line-soft);
}
.plaster .h2,.plaster .h3{ color:var(--plaster-ink); }
.plaster .eyebrow{ color:#7a6242; }
.plaster .lede,.plaster .muted,.plaster p{ color:#4a4d52; }
.plaster .sec__num{ color:#7d7f84; border-top-color:#b3ac98; }

.steps{ list-style:none; counter-reset:s; margin:0; padding:0; }
.steps li{
  counter-increment:s; position:relative;
  padding:0 0 22px 56px; margin:0 0 22px;
  border-bottom:1px solid #bdb6a2;
}
.steps li:last-child{ border-bottom:0; margin-bottom:0; }
.steps li::before{
  content:counter(s,upper-roman);
  position:absolute; left:0; top:-2px;
  font-family:var(--f-carve); font-size:20px; color:#8a6231;
  width:40px; text-align:right;
}
.steps h3{ font-size:16px; margin:0 0 4px; }
.steps p{ margin:0; font-size:14.5px; }

.code{
  font-family:var(--f-data); font-size:12px;
  background:#c3bca7; border:1px solid #b0a891; color:#2b2e33;
  padding:9px 12px; margin-top:10px; overflow-x:auto; white-space:pre;
}

/* ---------- tables ---------- */

.tbl{ width:100%; border-collapse:collapse; font-size:14px; }
.tbl th,.tbl td{
  text-align:left; padding:12px 14px; border-bottom:1px solid var(--line);
  vertical-align:top;
}
.tbl th{
  font-family:var(--f-data); font-size:10px; letter-spacing:.2em;
  text-transform:uppercase; color:var(--ash-dim); font-weight:400;
}
.tbl td{ color:var(--ash); }
.tbl td:first-child{ color:var(--chalk); }
.tbl tr:last-child td{ border-bottom:0; }
.tbl--fixed{ table-layout:fixed; }
.tbl-scroll{ overflow-x:auto; border:1px solid var(--line); }

/* ---------- news ---------- */

.post{
  display:grid; grid-template-columns:minmax(0,180px) minmax(0,1fr);
  gap:clamp(16px,4vw,48px);
  padding:30px 0; border-bottom:1px solid var(--line-soft);
}
.post:last-child{ border-bottom:0; }
.post__meta{ font-family:var(--f-data); font-size:11px; color:var(--ash-dim); }
.post__tag{
  display:inline-block; margin-top:8px; padding:2px 8px;
  border:1px solid var(--line); color:var(--brass-dim);
  font-size:9px; letter-spacing:.16em; text-transform:uppercase;
}
.post h3{ font-family:var(--f-carve); font-weight:400; font-size:22px; letter-spacing:.02em; }
.post ul{ margin:10px 0 0; padding-left:18px; color:var(--ash); font-size:14.5px; }
.post li{ margin-bottom:6px; }
@media (max-width:760px){ .post{ grid-template-columns:1fr; gap:12px; } }

/* ---------- forms ---------- */

.form{ display:grid; gap:16px; }
.field label{
  display:block; font-family:var(--f-data); font-size:10px;
  letter-spacing:.2em; text-transform:uppercase; color:var(--ash-dim);
  margin-bottom:7px;
}
.field input,.field select,.field textarea{
  width:100%; background:var(--basalt-deep); color:var(--chalk);
  border:1px solid var(--line); padding:12px 13px;
  font-family:var(--f-ui); font-size:15px;
}
.field input:focus,.field select:focus,.field textarea:focus{
  border-color:var(--brass); outline:none;
}
.field small{ display:block; margin-top:6px; color:var(--ash-dim); font-size:12px; }
.field--err input{ border-color:var(--rust); }
.field__err{ display:none; color:var(--rust); font-size:12px; margin-top:6px; }
.field--err .field__err{ display:block; }

.check{ display:flex; gap:10px; align-items:flex-start; font-size:13.5px; color:var(--ash); }
.check input{ width:auto; margin-top:4px; }

.meter{ height:3px; background:var(--line); margin-top:8px; }
.meter i{ display:block; height:100%; width:0; background:var(--rust); transition:width .2s var(--ease), background .2s var(--ease); }

/* ---------- accordion ---------- */

.faq{ border-top:1px solid var(--line-soft); }
.faq details{ border-bottom:1px solid var(--line-soft); }
.faq summary{
  cursor:pointer; list-style:none; padding:18px 0;
  display:flex; gap:16px; align-items:baseline;
  font-size:16px; color:var(--chalk);
}
.faq summary::-webkit-details-marker{ display:none; }
.faq summary::before{
  content:"+"; font-family:var(--f-data); color:var(--brass);
  font-size:14px; flex:0 0 14px;
}
.faq details[open] summary::before{ content:"−"; }
.faq div{ padding:0 0 20px 30px; color:var(--ash); font-size:14.5px; max-width:72ch; }

/* ---------- callout ---------- */

.note{
  border-left:2px solid var(--brass-dim);
  background:var(--slab); padding:16px 18px;
  font-size:14px; color:var(--ash);
}
.note b{ color:var(--chalk); font-weight:600; }

/* ---------- footer ---------- */

.foot{
  border-top:1px solid var(--line-soft);
  background:var(--basalt-deep);
  padding:52px 0 30px;
}
.foot__in{
  max-width:var(--maxw); margin:0 auto; padding:0 var(--gut);
  display:grid; grid-template-columns:1.4fr repeat(3,1fr);
  gap:32px;
}
@media (max-width:820px){ .foot__in{ grid-template-columns:1fr 1fr; } }
@media (max-width:520px){ .foot__in{ grid-template-columns:1fr; } }
.foot h4{
  font-family:var(--f-data); font-size:10px; letter-spacing:.22em;
  text-transform:uppercase; color:var(--ash-dim); margin:0 0 14px;
}
.foot ul{ list-style:none; margin:0; padding:0; }
.foot li{ margin-bottom:8px; }
.foot a{ color:var(--ash); text-decoration:none; font-size:14px; }
.foot a:hover{ color:var(--brass); }
.foot__legal{
  max-width:var(--maxw); margin:40px auto 0; padding:22px var(--gut) 0;
  border-top:1px solid var(--line-soft);
  font-family:var(--f-data); font-size:10.5px; color:var(--ash-dim);
  line-height:1.7;
}

/* ---------- reveal ---------- */

.rv{ opacity:0; transform:translateY(10px); }
.rv.in{ opacity:1; transform:none; transition:opacity .5s var(--ease), transform .5s var(--ease); }
@media (prefers-reduced-motion:reduce){
  .rv{ opacity:1; transform:none; }
  .alt__needle,.alt__read{ transition:none; }
}

/* ---------- utils ---------- */
.stack > * + *{ margin-top:16px; }
.hide{ display:none !important; }