/* ===================================================================
   ABYSSAL — cinematic deep-sea scroll
   =================================================================== */
:root{
  --cyan:#3ff0ff;
  --cyan-dim:#0d7f8c;
  --navy:#05121f;
  --ink:#e8f6fb;
  --ink-dim:#7fa8b8;
  --hud:#5fe6f2;
  --mono:'Space Mono', ui-monospace, monospace;
  --sans:'Chakra Petch', system-ui, sans-serif;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:auto}
body{
  background:#02060b;
  color:var(--ink);
  font-family:var(--sans);
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
::selection{background:var(--cyan);color:#001217}

/* ---------- LOADER ---------- */
.loader{
  position:fixed;inset:0;z-index:100;
  background:#02060b;
  display:flex;align-items:center;justify-content:center;
  transition:opacity .8s ease, visibility .8s ease;
}
.loader.done{opacity:0;visibility:hidden;pointer-events:none}
.loader-inner{width:min(440px,80vw);text-align:center}
.loader-mark{
  font-family:var(--sans);font-weight:700;
  letter-spacing:.7em;font-size:clamp(20px,4vw,30px);
  color:var(--ink);margin-bottom:34px;padding-left:.7em;
  text-shadow:0 0 24px rgba(63,240,255,.35);
}
.loader-bar{
  height:2px;width:100%;background:rgba(95,230,242,.15);
  overflow:hidden;position:relative;
}
.loader-bar span{
  position:absolute;left:0;top:0;height:100%;width:0%;
  background:var(--cyan);box-shadow:0 0 14px var(--cyan);
  transition:width .2s ease;
}
.loader-meta{
  display:flex;justify-content:space-between;margin-top:16px;
  font-family:var(--mono);font-size:10px;letter-spacing:.25em;
  color:var(--ink-dim);
}

/* ---------- CANVAS SCENE ---------- */
#scene{
  position:fixed;inset:0;width:100vw;height:100vh;
  object-fit:cover;z-index:0;background:#02060b;
  display:block;
}
.grade-overlay{
  position:fixed;inset:0;z-index:1;pointer-events:none;
  mix-blend-mode:multiply;
  background:linear-gradient(180deg, rgba(5,18,31,0) 0%, rgba(3,10,20,0) 100%);
  transition:background .1s linear;
}
.vignette{
  position:fixed;inset:0;z-index:2;pointer-events:none;
  background:radial-gradient(120% 90% at 50% 42%, transparent 40%, rgba(0,0,0,.55) 100%);
  mix-blend-mode:multiply;
}

/* ---------- HUD ---------- */
.hud{position:fixed;z-index:10;pointer-events:none;font-family:var(--mono)}
.hud-top{
  top:0;left:0;right:0;
  display:flex;justify-content:space-between;align-items:flex-start;
  padding:26px 34px;
  mix-blend-mode:screen;
}
.hud-left{display:flex;flex-direction:column;gap:4px}
.hud-logo{
  font-family:var(--sans);font-weight:700;letter-spacing:.42em;
  font-size:15px;color:var(--ink);padding-left:.42em;
}
.hud-sub{font-size:9px;letter-spacing:.34em;color:var(--ink-dim)}
.hud-right{text-align:right}
.hud-status{
  font-size:10px;letter-spacing:.22em;color:var(--hud);
  display:inline-flex;align-items:center;gap:8px;
}
.dot{
  width:6px;height:6px;border-radius:50%;background:var(--cyan);
  box-shadow:0 0 10px var(--cyan);animation:pulse 2s infinite;
}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.25}}

/* corner ticks on hud-top */
.hud-top::before,.hud-top::after{
  content:"";position:absolute;top:20px;width:14px;height:14px;
  border-top:1px solid rgba(95,230,242,.4);
}
.hud-top::before{left:20px;border-left:1px solid rgba(95,230,242,.4)}
.hud-top::after{right:20px;border-right:1px solid rgba(95,230,242,.4)}

/* ---------- DEPTH METER ---------- */
.depth-meter{
  left:34px;top:50%;transform:translateY(-50%);
  width:150px;
}
.dm-frame{
  border-left:1px solid rgba(95,230,242,.22);
  padding-left:16px;position:relative;
}
.dm-readout{
  font-family:var(--sans);font-weight:600;
  font-size:34px;line-height:1;color:var(--ink);
  letter-spacing:.02em;
  text-shadow:0 0 20px rgba(63,240,255,.4);
  font-variant-numeric:tabular-nums;
}
.dm-unit{font-size:14px;color:var(--hud);margin-left:3px}
.dm-zone{
  margin-top:8px;font-size:10px;letter-spacing:.28em;
  color:var(--hud);min-height:13px;
  transition:color .4s;
}
.dm-track{
  margin-top:16px;height:180px;width:3px;position:relative;
  background:rgba(95,230,242,.12);
}
.dm-progress{
  position:absolute;left:0;top:0;width:100%;height:0%;
  background:linear-gradient(180deg,var(--cyan),var(--cyan-dim));
  box-shadow:0 0 12px var(--cyan);
}
.dm-progress::after{
  content:"";position:absolute;left:50%;bottom:0;
  transform:translate(-50%,50%);
  width:9px;height:9px;border-radius:50%;
  background:var(--cyan);box-shadow:0 0 14px var(--cyan);
}
.dm-ticks{position:absolute;inset:0;left:8px;width:60px}
.dm-ticks i{
  position:absolute;left:0;width:6px;height:1px;
  background:rgba(95,230,242,.35);
}
.dm-ticks i span{
  position:absolute;left:10px;top:-5px;font-size:8px;
  letter-spacing:.1em;color:var(--ink-dim);white-space:nowrap;
}
.dm-scale{
  display:flex;justify-content:space-between;
  margin-top:10px;font-size:8px;letter-spacing:.15em;color:var(--ink-dim);
}
.dm-press{
  margin-top:14px;font-size:10px;letter-spacing:.18em;color:var(--ink-dim);
}
.dm-press span{color:var(--hud)}

/* ---------- SCROLL HINT ---------- */
.scroll-hint{
  position:fixed;left:50%;bottom:30px;transform:translateX(-50%);
  z-index:10;text-align:center;font-family:var(--mono);
  color:var(--ink-dim);transition:opacity .5s;
}
.scroll-hint span{font-size:9px;letter-spacing:.4em}
.sh-line{width:1px;height:38px;margin:12px auto 0;background:rgba(95,230,242,.2);position:relative;overflow:hidden}
.sh-line i{position:absolute;top:-40%;left:0;width:100%;height:40%;background:var(--cyan);box-shadow:0 0 8px var(--cyan);animation:drop 1.8s cubic-bezier(.6,.1,.3,1) infinite}
@keyframes drop{0%{top:-40%}100%{top:100%}}
.scroll-hint.hide{opacity:0;pointer-events:none}

/* ---------- STORY / PANELS ---------- */
#story{position:relative;z-index:5}
.panel{
  min-height:100vh;
  display:flex;align-items:center;
  padding:12vh 34px;
  position:relative;
}
.panel-inner{
  max-width:1240px;margin:0 auto;width:100%;
}
.panel-inner.center{text-align:center;display:flex;flex-direction:column;align-items:center}

.eyebrow{
  font-family:var(--mono);font-size:11px;letter-spacing:.42em;
  color:var(--hud);margin-bottom:26px;
}

.mega{
  font-family:var(--sans);font-weight:700;
  font-size:clamp(48px,9vw,132px);line-height:.92;
  letter-spacing:-.02em;color:var(--ink);
  text-shadow:0 4px 60px rgba(0,0,0,.6);
}
.mega.small{font-size:clamp(40px,7vw,96px)}
.lede{
  max-width:560px;margin-top:30px;
  font-size:clamp(15px,1.5vw,19px);line-height:1.6;
  color:var(--ink-dim);font-weight:300;
}
.lede em{color:var(--ink);font-style:normal;font-weight:500}

.zone-index{
  font-family:var(--mono);font-size:11px;letter-spacing:.34em;
  color:var(--hud);margin-bottom:40px;
  display:inline-block;padding-bottom:8px;
  border-bottom:1px solid rgba(95,230,242,.2);
}

/* facts */
.fact{max-width:820px}
.fact-num{
  display:block;font-family:var(--sans);font-weight:700;
  font-size:clamp(64px,14vw,190px);line-height:.85;
  letter-spacing:-.03em;color:var(--ink);
  text-shadow:0 0 80px rgba(63,240,255,.18);
}
.fact-unit{font-size:.34em;color:var(--hud);font-weight:500;margin-left:.05em}
.fact-text{
  margin-top:34px;max-width:540px;
  font-size:clamp(16px,1.6vw,21px);line-height:1.62;
  color:var(--ink-dim);font-weight:300;
}
.fact-text em{color:var(--cyan);font-style:normal;font-weight:400}

/* specs */
.spec-title{
  font-family:var(--sans);font-weight:600;
  font-size:clamp(30px,4vw,56px);letter-spacing:-.01em;
  margin-bottom:50px;color:var(--ink);
}
.spec-grid{
  display:grid;grid-template-columns:repeat(3,1fr);
  gap:1px;background:rgba(95,230,242,.14);
  border:1px solid rgba(95,230,242,.14);
}
.spec{
  background:rgba(4,12,20,.55);backdrop-filter:blur(6px);
  padding:34px 30px;display:flex;flex-direction:column;gap:14px;
}
.spec-val{
  font-family:var(--sans);font-weight:700;
  font-size:clamp(30px,3.4vw,46px);line-height:1;color:var(--ink);
  letter-spacing:-.01em;font-variant-numeric:tabular-nums;
}
.spec-u{font-size:.42em;color:var(--hud);font-weight:500;margin-left:.12em}
.spec-label{
  font-family:var(--mono);font-size:11px;letter-spacing:.15em;
  color:var(--ink-dim);line-height:1.5;text-transform:uppercase;
}

/* offer */
.offer-line{
  display:flex;align-items:center;gap:22px;flex-wrap:wrap;justify-content:center;
  font-family:var(--mono);font-size:clamp(12px,1.4vw,16px);
  letter-spacing:.3em;color:var(--hud);margin-bottom:40px;
}
.offer-line i{width:5px;height:5px;background:var(--cyan);border-radius:50%;box-shadow:0 0 10px var(--cyan)}

/* cta */
.cta-head{
  font-family:var(--sans);font-weight:700;
  font-size:clamp(44px,7vw,104px);line-height:.95;letter-spacing:-.02em;
  color:var(--ink);
  background:linear-gradient(180deg,#ffffff,var(--cyan));
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
  margin-bottom:22px;
}
.manifest{
  margin-top:40px;display:flex;gap:12px;flex-wrap:wrap;justify-content:center;
  width:100%;max-width:620px;
}
.manifest input{
  flex:1 1 200px;background:rgba(6,16,26,.6);
  border:1px solid rgba(95,230,242,.25);color:var(--ink);
  padding:16px 18px;font-family:var(--mono);font-size:12px;letter-spacing:.14em;
  outline:none;transition:border-color .3s, box-shadow .3s;
}
.manifest input::placeholder{color:var(--ink-dim)}
.manifest input:focus{border-color:var(--cyan);box-shadow:0 0 0 1px var(--cyan),0 0 24px rgba(63,240,255,.2)}
.manifest button{
  flex:0 0 auto;background:var(--cyan);color:#00161c;border:none;
  cursor:pointer;
  padding:16px 30px;font-family:var(--mono);font-weight:700;
  font-size:12px;letter-spacing:.2em;
  display:inline-flex;align-items:center;gap:10px;
  transition:transform .25s, box-shadow .25s, background .25s;
}
.manifest button span{transition:transform .25s}
.manifest button:hover{box-shadow:0 0 30px rgba(63,240,255,.5)}
.manifest button:hover span{transform:translateX(5px)}
.cta-foot{
  margin-top:64px;display:flex;justify-content:space-between;width:100%;
  max-width:760px;font-family:var(--mono);font-size:9px;letter-spacing:.22em;
  color:var(--ink-dim);border-top:1px solid rgba(95,230,242,.14);padding-top:18px;
}

/* reveal animation */
.panel-inner > *{
  opacity:0;transform:translateY(28px);
  transition:opacity .9s cubic-bezier(.2,.7,.2,1), transform .9s cubic-bezier(.2,.7,.2,1);
}
.panel.in .panel-inner > *{opacity:1;transform:none}
.panel.in .panel-inner > *:nth-child(2){transition-delay:.08s}
.panel.in .panel-inner > *:nth-child(3){transition-delay:.16s}
.panel.in .panel-inner > *:nth-child(4){transition-delay:.24s}

/* ---------- RESPONSIVE ---------- */
@media (max-width:860px){
  .depth-meter{left:16px;width:118px;transform:translateY(-50%) scale(.86);transform-origin:left center}
  .hud-top{padding:18px 20px}
  .hud-sub{display:none}
  .spec-grid{grid-template-columns:repeat(2,1fr)}
  .panel{padding:14vh 22px}
  .cta-foot{flex-direction:column;gap:8px;text-align:center}
}
@media (max-width:520px){
  .spec-grid{grid-template-columns:1fr}
  .depth-meter{opacity:.85}
  .offer-line{gap:12px}
}

/* reduced motion */
@media (prefers-reduced-motion:reduce){
  .panel-inner > *{opacity:1;transform:none;transition:none}
}