/* =========================================================
   VESP TECH — three-screen site
   1. tokens      5. 01 overview
   2. base        6. 02 platform
   3. layout      7. 03 contact + footer
   4. header
   ========================================================= */

/* ---------- 1. tokens ---------- */
:root{
  --carbon:      #171A1F;   /* graphite carbon — page */
  --carbon-deep: #111419;   /* deeper panels */
  --carbon-soft: #1C2026;   /* raised panels */
  --gold:        #FDB707;   /* brand mark only */
  --white:       #F2F3F5;
  --blue:        #4B8DB8;
  --cyan:        #63C7D8;

  --fg:      var(--white);
  --fg-mute: rgb(242 243 245 / .62);
  --fg-dim:  rgb(242 243 245 / .50);
  --line:    rgb(242 243 245 / .14);
  --line-2:  rgb(242 243 245 / .08);

  --font: "Archivo", "Segoe UI", system-ui, -apple-system, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Consolas, monospace;

  --wrap: 1280px;
  --gut: clamp(20px, 4vw, 56px);
  --head-h: 76px;                        /* kept in sync by main.js */
  --screen: calc(100svh - var(--head-h));

  --ease: cubic-bezier(.22,.61,.36,1);
}

/* ---------- 2. base ---------- */
*,*::before,*::after{ box-sizing:border-box }

html{ -webkit-text-size-adjust:100%; scroll-padding-top:var(--head-h) }
@media (prefers-reduced-motion:no-preference){ html{ scroll-behavior:smooth } }

body{
  margin:0;
  background:var(--carbon);
  color:var(--fg);
  font-family:var(--font);
  font-size:clamp(15px,.55vw + 13.6px,17px);
  line-height:1.62;
  letter-spacing:.005em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

img{ max-width:100%; height:auto; display:block }
.sprite{ position:absolute; width:0; height:0; overflow:hidden }
.ico{
  width:1em; height:1em; flex:none;
  fill:none; stroke:currentColor; stroke-width:1.5;
  stroke-linecap:round; stroke-linejoin:round;
}

h1,h2{ margin:0; font-weight:600; letter-spacing:-.022em; line-height:1.03 }
h1{ font-size:clamp(34px,min(5.5vw,7.6vh),74px) }
h2{ font-size:clamp(24px,min(3.6vw,5.1vh),48px); line-height:1.06 }
p{ margin:0 }

a{ color:inherit; text-decoration:none }
:focus-visible{ outline:2px solid var(--cyan); outline-offset:3px; border-radius:2px }

.skip{
  position:absolute; left:-999px; top:0; z-index:200;
  background:var(--white); color:var(--carbon);
  padding:12px 18px; font:500 13px/1 var(--mono);
}
.skip:focus{ left:12px; top:12px }

.mono{ font-family:var(--mono); font-size:.72rem; letter-spacing:.14em; text-transform:uppercase }

.eyebrow{
  font-family:var(--mono); font-size:.7rem; font-weight:500;
  letter-spacing:.2em; text-transform:uppercase;
  color:var(--fg-dim);
  display:flex; align-items:center; gap:12px; flex-wrap:wrap;
  margin-bottom:clamp(10px,2vh,26px);
}
.eyebrow .num{ color:var(--fg) }
.dash{ width:24px; height:1px; background:currentColor; opacity:.4; display:inline-block; flex:none }

.lead{ font-size:clamp(15px,1.1vw,18.5px); color:var(--fg-mute); max-width:54ch }

/* ---------- 3. layout ---------- */
.wrap{
  width:100%; max-width:var(--wrap);
  margin-inline:auto; padding-inline:var(--gut);
}

/* the three screens */
.hero,.platform,.contact{
  min-height:var(--screen);
  display:flex; flex-direction:column;
}

@media (min-width:861px) and (min-height:660px){
  html{ scroll-snap-type:y proximity }
  .hero,.platform,.contact{ scroll-snap-align:start }
}

/* dotted technical grid, from the brand key visuals */
.dots{
  position:absolute; inset:0; pointer-events:none;
  background-image:radial-gradient(rgb(242 243 245 / .16) 1px, transparent 1px);
  background-size:28px 28px;
}

/* buttons */
.btn{
  display:inline-flex; align-items:center; gap:10px;
  padding:13px 22px; border:1px solid var(--line);
  font-family:var(--mono); font-size:.72rem; font-weight:500;
  letter-spacing:.14em; text-transform:uppercase; white-space:nowrap;
  transition:background .3s var(--ease), color .3s var(--ease), border-color .3s var(--ease);
}
.btn .ico{ width:14px; height:14px; transition:transform .3s var(--ease) }
.btn:hover .ico{ transform:translateX(4px) }

.btn--solid{ background:var(--white); border-color:var(--white); color:var(--carbon) }
.btn--solid:hover{ background:#fff; border-color:#fff }
.btn--line:hover,.btn--ghost:hover{ border-color:var(--white); background:rgb(242 243 245 / .06) }

/* ---------- 4. header ---------- */
.head{
  position:sticky; top:0; z-index:100;
  border-bottom:1px solid transparent;
  transition:background .35s var(--ease), border-color .35s var(--ease);
}
.head.is-stuck{
  background:rgb(23 26 31 / .86);
  backdrop-filter:blur(14px) saturate(120%);
  border-bottom-color:var(--line-2);
}
.head__inner{
  max-width:var(--wrap); margin-inline:auto; padding:13px var(--gut);
  display:flex; align-items:center; gap:clamp(16px,3vw,44px);
}

/* brand lockup: mark + wordmark + sub-line spread to the wordmark's width */
.brand{ --word-h:14.3px; display:flex; align-items:center; gap:10px; flex:none }
.brand--sm{ --word-h:12.1px }
.brand__mark{ height:calc(var(--word-h) * 3.4); width:auto }
.brand__lockup{ display:block }
.brand__word{ height:var(--word-h); width:auto }
.brand__sub{
  display:flex; justify-content:space-between;
  width:calc(var(--word-h) * 6.19);
  margin-top:calc(var(--word-h) * .34);
  font-family:var(--mono); font-size:calc(var(--word-h) * .54);
  line-height:1; color:var(--fg-mute);
}
.brand__sub i{ font-style:normal }

.nav{ display:flex; gap:clamp(16px,2.4vw,36px); margin-left:auto }
.nav a{
  font-family:var(--mono); font-size:.72rem; letter-spacing:.11em;
  text-transform:uppercase; color:var(--fg-dim);
  padding:6px 0; position:relative; transition:color .25s var(--ease);
}
.nav a .n{ margin-right:7px; opacity:.55 }
.nav a::after{
  content:""; position:absolute; left:0; right:100%; bottom:0; height:1px;
  background:var(--white); transition:right .35s var(--ease);
}
.nav a:hover,.nav a.is-active{ color:var(--fg) }
.nav a:hover::after,.nav a.is-active::after{ right:0 }

.head__cta{ flex:none }

.burger{
  display:none; width:42px; height:42px; margin-left:auto;
  background:none; border:1px solid var(--line); cursor:pointer;
  flex-direction:column; align-items:center; justify-content:center; gap:5px;
}
.burger span{ width:16px; height:1px; background:var(--fg); transition:transform .3s var(--ease) }
.burger[aria-expanded="true"] span:first-child{ transform:translateY(3px) rotate(45deg) }
.burger[aria-expanded="true"] span:last-child{ transform:translateY(-3px) rotate(-45deg) }

/* ---------- 5. screen 01 — overview ---------- */
.hero{ position:relative; overflow:hidden; justify-content:center }
.hero__bg{
  position:absolute; inset:-10% -10% 0;
  background:
    radial-gradient(48% 52% at 74% 40%, rgb(75 141 184 / .14), transparent 70%),
    radial-gradient(40% 46% at 20% 12%, rgb(242 243 245 / .05), transparent 72%);
  pointer-events:none;
}
.hero__inner{
  position:relative; z-index:1;
  padding-block:clamp(22px,3.6vh,52px) clamp(16px,2.8vh,40px);
}
.hero__lower{
  display:grid; gap:clamp(20px,3vw,56px);
  grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);
  align-items:center; margin-top:clamp(18px,3vh,44px);
}
.hero__actions{ display:flex; flex-wrap:wrap; gap:14px; margin-top:clamp(20px,3.2vh,32px) }

.hero__craft{ position:relative; margin:0; display:grid; justify-items:center }
.hero__craft::before{
  content:""; position:absolute; top:46%; left:50%; translate:-50% -50%;
  width:min(96%,560px); aspect-ratio:1; border-radius:50%;
  background:radial-gradient(circle, rgb(99 199 216 / .10), transparent 62%);
}
.hero__craft picture{ position:relative; display:block }
.hero__craft img{
  width:min(100%,520px); max-height:42vh; object-fit:contain;
  filter:drop-shadow(0 34px 60px rgb(0 0 0 / .6)) contrast(1.05);
}
.hero__craft figcaption{
  margin-top:10px; color:var(--fg-dim); font-family:var(--mono);
  font-size:.62rem; letter-spacing:.16em; text-transform:uppercase;
  display:flex; align-items:center; gap:10px; flex-wrap:wrap; justify-content:center;
}

.ticker{
  position:relative; margin:auto 0 0; display:grid; gap:1px;
  grid-template-columns:repeat(4,1fr);
  list-style:none; border-top:1px solid var(--line-2);
}
.ticker li{
  padding:clamp(16px,2.4vh,24px) 20px clamp(18px,2.8vh,28px) 0;
  display:flex; flex-direction:column; gap:4px;
  border-right:1px solid var(--line-2);
}
.ticker li:last-child{ border-right:0 }
.ticker strong{ font-size:clamp(16px,1.5vw,22px); font-weight:600; letter-spacing:-.01em }
.ticker span{
  font-family:var(--mono); font-size:.64rem; letter-spacing:.1em;
  text-transform:uppercase; color:var(--fg-dim);
}

/* ---------- 6. screen 02 — platform ---------- */
.platform{ background:var(--carbon-deep); border-top:1px solid var(--line-2) }
.platform__bar{ border-bottom:1px solid var(--line-2); flex:none }
.platform__bar-in{
  display:flex; align-items:center; justify-content:space-between; gap:20px;
  padding-block:clamp(10px,1.6vh,15px); flex-wrap:wrap;
}
.platform__id{ display:flex; align-items:center; gap:10px; color:var(--fg) }
.platform__id img{ height:20px; width:auto }
.chip{
  display:inline-flex; align-items:center; gap:9px;
  border:1px solid var(--line); padding:6px 13px; color:var(--fg-dim); font-size:.64rem;
}
.chip .dot{ width:5px; height:5px; border-radius:50%; background:var(--cyan); flex:none }

.platform__grid{
  flex:1; min-height:0;
  display:grid; grid-template-columns:minmax(0,1fr) minmax(0,1.04fr);
  gap:clamp(28px,3.4vw,60px); align-items:stretch;
  padding-block:clamp(16px,2.7vh,44px);
}
.platform__copy{ display:flex; flex-direction:column; justify-content:center; min-height:0 }
.platform__copy h2{ margin-bottom:clamp(10px,1.6vh,18px); max-width:17ch }
.platform__intro{
  color:var(--fg-mute); max-width:54ch;
  font-size:clamp(14px,1.55vh,16px); line-height:1.5;
}

.spec{ margin:clamp(12px,2.4vh,36px) 0 0 }
.spec__row{
  display:flex; align-items:center; justify-content:space-between; gap:20px;
  padding-block:clamp(3px,.62vh,11px);
  border-bottom:1px solid var(--line-2);
}
.spec__row:first-child{ border-top:1px solid var(--line-2) }
.spec dt{
  display:flex; align-items:center; gap:clamp(10px,1.4vh,14px);
  font-size:clamp(13px,1.5vh,15px); color:var(--fg-mute);
}
.spec dd{
  margin:0; text-align:right; font-family:var(--mono);
  font-size:clamp(11px,1.3vh,12.5px);
  letter-spacing:.04em; font-weight:500; color:var(--fg);
}
.spec__ico{
  width:clamp(20px,2.75vh,28px); aspect-ratio:1; flex:none; border-radius:50%;
  border:1px solid var(--line);
  display:grid; place-items:center; color:var(--fg-mute);
}
.spec__ico .ico{ --s:clamp(10px,1.45vh,14px); width:var(--s); height:var(--s) }

/* stage: the photograph, upgraded in place to the interactive 3D model */
.platform__visual{
  position:relative; margin:0; min-height:0;
  display:grid; grid-template:"stage" 1fr / minmax(0,1fr); place-items:center;
  padding:clamp(26px,4vh,52px) clamp(14px,2vw,36px) clamp(34px,5vh,50px);
  background:var(--carbon); border:1px solid var(--line-2); overflow:hidden;
}
.platform__visual .dots{
  -webkit-mask-image:radial-gradient(62% 58% at 50% 46%, transparent 40%, #000 92%);
  mask-image:radial-gradient(62% 58% at 50% 46%, transparent 40%, #000 92%);
  opacity:.75;
}
.platform__visual picture,
.platform__visual .craft-model{
  grid-area:stage; width:100%; height:100%; min-height:0;
}
.platform__visual picture{
  position:relative; display:grid; place-items:center;
  transition:opacity .5s var(--ease);
}
.platform__visual img{
  max-width:min(94%,560px); max-height:100%; width:auto; object-fit:contain;
  filter:drop-shadow(0 26px 46px rgb(0 0 0 / .55));
}

/* --- 3D model (assets/js/viewer.js) --- */
.craft-model{
  position:relative; z-index:1;
  background:transparent;
  opacity:0; transition:opacity .6s var(--ease);
  --poster-color:transparent;
  --progress-bar-color:var(--white);
  --progress-bar-height:2px;
}
.has-model .craft-model{ opacity:1 }
.has-model .craft-photo{ opacity:0; pointer-events:none }

.craft-hint{
  position:absolute; right:14px; top:14px; z-index:2;
  border:1px solid var(--line-2); padding:6px 12px;
  color:var(--fg-dim); font-size:.6rem; letter-spacing:.16em;
  background:rgb(23 26 31 / .6); backdrop-filter:blur(6px);
  transition:opacity .5s var(--ease);
}
.craft-hint.is-gone{ opacity:0; pointer-events:none }
@media (hover:none){ .craft-hint{ font-size:.58rem } }
.platform__visual .tag{
  position:absolute; top:14px; left:14px;
  border:1px solid var(--line-2); padding:6px 12px;
  color:var(--fg-dim); font-size:.6rem; letter-spacing:.18em;
}
.platform__visual figcaption{
  position:absolute; bottom:14px; left:50%; translate:-50% 0; white-space:nowrap;
  color:var(--fg-dim); font-family:var(--mono);
  font-size:.6rem; letter-spacing:.14em; text-transform:uppercase;
  display:flex; align-items:center; gap:10px;
}

/* ---------- 7. screen 03 — contact + footer ---------- */
.contact{ border-top:1px solid var(--line-2) }
.contact__in{
  display:grid; gap:clamp(32px,5vw,72px);
  grid-template-columns:minmax(0,1.1fr) minmax(300px,.9fr);
  align-items:center; margin-block:auto; padding-block:clamp(48px,8vh,110px);
}
.contact__lead{ margin-top:24px; color:var(--fg-mute); max-width:46ch; font-size:clamp(15px,1vw,17.5px) }
.contact__card{
  border:1px solid var(--line-2); padding:clamp(28px,3vw,42px);
  background:var(--carbon-soft);
}
.contact__label{ color:var(--fg-dim); margin-bottom:18px }
.contact__mail{
  display:inline-block; font-size:clamp(19px,2.1vw,28px); font-weight:500;
  letter-spacing:-.015em; word-break:break-word;
  background-image:linear-gradient(currentColor,currentColor);
  background-size:100% 1px; background-position:0 100%; background-repeat:no-repeat;
  padding-bottom:4px; opacity:.92; transition:opacity .25s var(--ease);
}
.contact__mail:hover{ opacity:1 }
.copy{
  display:block; margin-top:22px; padding:9px 16px; cursor:pointer;
  background:none; border:1px solid var(--line); color:var(--fg-dim);
  font-family:var(--mono); font-size:.66rem; letter-spacing:.14em; text-transform:uppercase;
  transition:color .25s var(--ease), border-color .25s var(--ease);
}
.copy:hover{ color:var(--fg); border-color:var(--white) }
.copy.is-done{ color:var(--cyan); border-color:var(--cyan) }
.contact__loc{
  margin-top:26px; padding-top:20px; border-top:1px solid var(--line-2);
  color:var(--fg-dim); display:flex; align-items:center; gap:12px;
}

.foot{ border-top:1px solid var(--line-2); padding-block:22px 26px; flex:none }
.foot__in{ display:flex; align-items:center; justify-content:space-between; gap:24px; flex-wrap:wrap }
.foot__nav{ display:flex; flex-wrap:wrap; gap:8px 26px }
.foot__nav a{
  font-family:var(--mono); font-size:.68rem; letter-spacing:.12em;
  text-transform:uppercase; color:var(--fg-dim); transition:color .25s var(--ease);
}
.foot__nav a:hover{ color:var(--fg) }
.foot__meta{ color:var(--fg-dim); display:flex; align-items:center; gap:10px; font-size:.66rem }

/* ---------- reveal ---------- */
.reveal{ opacity:0; transform:translateY(14px) }
.is-in{ opacity:1; transform:none; transition:opacity .7s var(--ease), transform .7s var(--ease) }
@media (prefers-reduced-motion:reduce){
  .reveal{ opacity:1; transform:none }
  *,*::before,*::after{ transition-duration:.01ms !important; animation-duration:.01ms !important }
}

/* ---------- responsive ---------- */
@media (max-width:1080px){
  .hero,.platform,.contact{ min-height:0 }
  .hero__lower{ grid-template-columns:1fr; gap:clamp(20px,4vw,36px) }
  .hero__craft{ order:-1 }
  .hero__craft img{ width:min(76%,460px); max-height:40vh }
  .hero__inner{ padding-block:clamp(28px,5vw,56px) clamp(28px,4vw,48px) }
  .platform__grid{ grid-template-columns:1fr; padding-block:clamp(28px,5vw,48px) }
  .platform__visual{ min-height:clamp(340px,52vh,470px); order:-1 }
  .platform__visual img{ max-height:320px }
  .contact__in{ grid-template-columns:1fr; padding-block:clamp(56px,9vw,96px) }
  .spec__row{ padding-block:12px }
  .spec dt{ font-size:.9rem }
  .spec dd{ font-size:.76rem }
  .spec__ico{ width:30px }
  .spec__ico .ico{ --s:15px }
}

@media (max-width:860px){
  .nav{
    position:fixed; inset:var(--head-h) 0 auto; flex-direction:column; gap:0;
    background:rgb(17 20 25 / .97); backdrop-filter:blur(12px);
    border-block:1px solid var(--line-2); padding:8px var(--gut) 24px;
    transform:translateY(-120%); visibility:hidden; z-index:99;
    transition:transform .4s var(--ease), visibility .4s;
  }
  .nav.is-open{ transform:none; visibility:visible }
  .nav a{ padding:16px 0; border-bottom:1px solid var(--line-2); font-size:.8rem }
  .nav a::after{ display:none }
  .head__cta{ display:none }
  .burger{ display:flex }
  .ticker{ grid-template-columns:repeat(2,1fr) }
  .ticker li{ padding-block:20px 22px }
  .ticker li:nth-child(2n){ border-right:0 }
}

@media (max-width:620px){
  .spec__row{ align-items:flex-start; flex-direction:column; gap:6px; padding-block:11px }
  .spec dd{ text-align:left; padding-left:44px }
  .platform__visual figcaption{
    display:block; white-space:normal; text-align:center; width:86%; line-height:1.6;
  }
  .platform__visual figcaption .dash{ margin:0 8px; vertical-align:middle }
  .hero__craft figcaption .dash{ width:12px }
  .hero__actions{ gap:10px }
  .hero__actions .btn{ flex:1 1 100%; justify-content:center }
  .foot__in{ flex-direction:column; align-items:flex-start }
}