:root{
  --abyss:#060C1A; --glass:#0D1C36; --glass-2:#11244A; --line:#1E3350; --foam:#EAF0F8; --mute:#93A4BD;
  --actinic:#5B78FF; --actinic-deep:#2E4BFF; --signal:#E8343A; --coral:#FFB86B; --ok:#4FD1A5;
  --display:'Barlow Condensed', 'Arial Narrow', sans-serif; --sans:'IBM Plex Sans', system-ui, sans-serif; --mono:'IBM Plex Mono', ui-monospace, monospace;
  --gutter:clamp(16px, 4vw, 48px); --max:1240px;
}
*,*::before,*::after{box-sizing:border-box}
html{background:var(--abyss); color-scheme:dark}
body{margin:0; background:var(--abyss); color:var(--foam); font:400 1.0625rem/1.6 var(--sans); -webkit-font-smoothing:antialiased; overflow-x:clip}
img{max-width:100%; display:block}
a{color:inherit}
:focus-visible{outline:2px solid var(--actinic); outline-offset:3px; border-radius:4px}
.skip{position:absolute; left:-999px; top:8px; background:var(--foam); color:var(--abyss); padding:8px 14px; z-index:100; border-radius:6px}
.skip:focus{left:8px}
.wrap{max-width:var(--max); margin:0 auto; padding:0 var(--gutter)}
.eyebrow{font:500 .78rem/1.2 var(--mono); letter-spacing:.14em; text-transform:uppercase; color:var(--mute)}
h1,h2,h3{font-family:var(--display); font-weight:700; line-height:.95; letter-spacing:.005em; margin:0; text-transform:uppercase}
h2{font-size:clamp(2.6rem, 6.4vw, 5.6rem)}
h3{font-size:clamp(1.5rem, 2.4vw, 2rem)}
p{margin:0}
.btn{display:inline-flex; align-items:center; gap:.6em; font:600 1rem/1 var(--sans); padding:15px 22px; border-radius:999px; text-decoration:none; border:1px solid transparent; transition:background .25s, border-color .25s, color .25s, transform .25s, box-shadow .25s; min-height:48px; will-change:transform}
.btn-primary{background:linear-gradient(180deg, #FFFFFF 0%, var(--foam) 55%, #C9D7EA 100%); color:var(--abyss); box-shadow:inset 0 1px 0 rgba(255,255,255,.95), inset 0 -1px 0 rgba(6,12,26,.22), 0 14px 30px rgba(2,6,16,.5), 0 3px 8px rgba(2,6,16,.45)}
.btn-primary:hover{background:linear-gradient(180deg, #FFFFFF 0%, #F4F8FD 55%, #D6E2F0 100%); transform:translateY(-2px); box-shadow:inset 0 1px 0 rgba(255,255,255,.95), inset 0 -1px 0 rgba(6,12,26,.22), 0 20px 38px rgba(2,6,16,.55), 0 5px 12px rgba(2,6,16,.45)}
.btn-primary:active{transform:translateY(0) scale(.98); box-shadow:inset 0 1px 0 rgba(255,255,255,.8), inset 0 2px 6px rgba(6,12,26,.25), 0 6px 14px rgba(2,6,16,.45)}
.btn-ghost{border-color:rgba(234,240,248,.38); color:var(--foam); background:linear-gradient(180deg, rgba(234,240,248,.13), rgba(234,240,248,.04)); box-shadow:inset 0 1px 0 rgba(255,255,255,.16), 0 10px 22px rgba(2,6,16,.35); backdrop-filter:blur(8px); -webkit-backdrop-filter:blur(8px)}
.btn-ghost:hover{border-color:rgba(234,240,248,.75); background:linear-gradient(180deg, rgba(234,240,248,.2), rgba(234,240,248,.07)); transform:translateY(-2px); box-shadow:inset 0 1px 0 rgba(255,255,255,.22), 0 16px 30px rgba(2,6,16,.42)}
.btn-ghost:active{transform:translateY(0) scale(.98); box-shadow:inset 0 2px 6px rgba(2,6,16,.4)}
.btn svg{width:16px; height:16px}

/* nav */
.nav{position:fixed; inset:0 0 auto 0; z-index:50; display:flex; align-items:center; justify-content:space-between; gap:16px; padding:12px var(--gutter); transition:background .35s, border-color .35s; border-bottom:1px solid transparent}
.nav.is-solid{background:rgba(6,12,26,.86); backdrop-filter:blur(12px); -webkit-backdrop-filter:blur(12px); border-color:var(--line); box-shadow:0 14px 34px rgba(2,6,16,.5)}
.brand{display:flex; align-items:center; gap:12px; text-decoration:none}
.brand img{width:44px; height:44px}
.brand span{font:700 1.25rem/1 var(--display); text-transform:uppercase; letter-spacing:.04em}
.nav ul{display:flex; gap:clamp(12px, 2.4vw, 30px); list-style:none; margin:0; padding:0; align-items:center}
.nav ul a{text-decoration:none; font-weight:500; font-size:.95rem; color:var(--mute); padding:10px 2px}
.nav ul a:hover,.nav ul a[aria-current]{color:var(--foam)}
.nav ul a.btn-primary{color:var(--abyss); padding:11px 18px}
.nav ul a.btn-ghost{color:var(--foam); padding:11px 18px}
.nav .btn{padding:11px 18px; min-height:44px; font-size:.92rem}
@media (max-width:820px){ .nav ul li.hide-s{display:none} .brand span{display:none} }

/* depth gauge */
.gauge{position:fixed; left:clamp(10px, 1.6vw, 24px); top:50%; transform:translateY(-50%); z-index:40; display:flex; flex-direction:column; align-items:center; gap:10px; pointer-events:none; opacity:0; transition:opacity .4s}
.gauge.on{opacity:1}
.gauge-track{width:2px; height:min(36vh, 260px); background:var(--line); position:relative; border-radius:2px; overflow:hidden}
.gauge-fill{position:absolute; inset:0 0 auto 0; height:100%; background:linear-gradient(var(--actinic), var(--actinic-deep)); transform-origin:top; transform:scaleY(0)}
.gauge-num{font:500 .7rem/1 var(--mono); color:var(--mute); writing-mode:vertical-rl; transform:rotate(180deg); letter-spacing:.12em}
@media (max-width:760px){ .gauge{display:none} }

/* sequence stages */
.stage{position:relative; height:100vh; height:100svh; overflow:hidden; background:var(--abyss)}
.stage canvas{position:absolute; inset:0; width:100%; height:100%; display:block}
.stage .still{position:absolute; inset:0; width:100%; height:100%; object-fit:cover; display:none}
.rm .stage .still{display:block}
.rm .stage canvas{display:none}
.scrim{position:absolute; inset:0; pointer-events:none; background:linear-gradient(90deg, rgba(6,12,26,.78) 0%, rgba(6,12,26,.45) 38%, rgba(6,12,26,0) 62%), radial-gradient(120% 80% at 50% 60%, rgba(6,12,26,0) 30%, rgba(6,12,26,.55) 75%, rgba(6,12,26,.9) 100%), linear-gradient(180deg, rgba(6,12,26,.55) 0%, rgba(6,12,26,0) 24%, rgba(6,12,26,0) 70%, var(--abyss) 100%)}
.hero-copy{position:absolute; inset:auto 0 0 0; padding:0 var(--gutter) clamp(40px, 9vh, 96px); max-width:var(--max); margin:0 auto; z-index:2}
.hero-copy h1{font-size:clamp(3.6rem, 12vw, 10.5rem); line-height:.86; text-shadow:0 2px 30px rgba(6,12,26,.6)}
.hero-copy h1 em{font-style:normal; color:var(--actinic)}
.hero-copy .lede{max-width:34ch; margin:18px 0 26px; color:#D3DCEA; font-size:clamp(1.02rem, 1.5vw, 1.2rem); text-shadow:0 1px 16px rgba(6,12,26,.8)}
.hero-copy .row{display:flex; gap:12px; flex-wrap:wrap}
.ai-note{position:absolute; right:var(--gutter); bottom:18px; z-index:2; font:400 .7rem/1.3 var(--mono); color:rgba(234,240,248,.6); max-width:30ch; text-align:right}
.scroll-cue{position:absolute; left:50%; bottom:14px; transform:translateX(-50%); font:500 .7rem/1 var(--mono); color:var(--mute); letter-spacing:.2em; z-index:2}
@media (max-width:760px){ .ai-note{display:none} .scroll-cue{display:none} }

/* statement */
.statement{padding:clamp(96px, 16vh, 180px) 0}
.statement blockquote{margin:0; font:600 clamp(2rem, 4.8vw, 4.1rem)/1.04 var(--display); text-transform:uppercase; max-width:20ch}
.statement blockquote .w{opacity:.18}
.rm .statement blockquote .w{opacity:1}
.statement cite{display:block; margin-top:22px; font:400 .82rem/1.4 var(--mono); color:var(--mute); font-style:normal}
.facts{display:grid; grid-template-columns:repeat(4, minmax(0,1fr)); gap:1px; background:var(--line); border:1px solid var(--line); margin-top:clamp(48px, 8vh, 88px); border-radius:14px; overflow:hidden; box-shadow:0 22px 44px rgba(2,6,16,.5), inset 0 1px 0 rgba(234,240,248,.07)}
.facts div{background:linear-gradient(180deg, #0B1834, var(--abyss) 78%); padding:22px 20px}
.facts b{display:block; font:700 clamp(1.9rem, 3.4vw, 2.8rem)/1 var(--display); color:var(--foam)}
.facts span{font-size:.88rem; color:var(--mute)}
@media (max-width:760px){ .facts{grid-template-columns:repeat(2, minmax(0,1fr))} }

/* tank wall categories */
.tanks{padding:0 0 clamp(96px, 14vh, 160px)}
.tanks header{display:flex; justify-content:space-between; align-items:end; gap:24px; flex-wrap:wrap; margin-bottom:36px}
.tanks header p{max-width:38ch; color:var(--mute)}
.wall{display:grid; grid-template-columns:repeat(4, minmax(0,1fr)); gap:14px; background:linear-gradient(180deg, #0C1424, #070D18); padding:14px; border-radius:18px; border:1px solid var(--line); box-shadow:0 28px 56px rgba(2,6,16,.55), inset 0 1px 0 rgba(234,240,248,.06)}
.tank{position:relative; aspect-ratio:3/4; border-radius:6px; overflow:hidden; text-decoration:none; background:var(--glass); border:1px solid #23395A; isolation:isolate; box-shadow:0 16px 34px rgba(0,0,0,.45), inset 0 1px 0 rgba(234,240,248,.08); transition:transform .35s cubic-bezier(.2,.7,.2,1), box-shadow .35s, border-color .35s}
.tank:hover,.tank:focus-visible{transform:translateY(-4px); border-color:#33507E; box-shadow:0 26px 48px rgba(0,0,0,.55), inset 0 1px 0 rgba(234,240,248,.12)}
.tank img{position:absolute; inset:0; width:100%; height:100%; object-fit:cover; filter:brightness(.55) saturate(.9); transition:filter .5s, transform .8s cubic-bezier(.2,.7,.2,1)}
.tank::before{content:""; position:absolute; inset:0 0 auto 0; height:5px; background:linear-gradient(90deg, transparent, rgba(160,190,255,.9), transparent); opacity:.35; z-index:2; transition:opacity .4s}
.tank::after{content:""; position:absolute; inset:0; background:linear-gradient(180deg, rgba(6,12,26,0) 40%, rgba(6,12,26,.88)); z-index:1}
.tank:hover img,.tank:focus-visible img{filter:brightness(1) saturate(1.1); transform:scale(1.04)}
.tank:hover::before,.tank:focus-visible::before{opacity:1}
.tank .tag{position:absolute; left:12px; right:12px; bottom:12px; z-index:3}
.tank .tag small{display:block; font:500 .7rem/1 var(--mono); letter-spacing:.12em; color:var(--coral); margin-bottom:8px; text-transform:uppercase}
.tank .tag b{display:block; font:700 clamp(1.4rem, 2.2vw, 1.9rem)/1 var(--display); text-transform:uppercase}
.tank .tag span{display:block; margin-top:6px; font-size:.86rem; color:#C4CFE0}
@media (max-width:900px){ .wall{grid-template-columns:repeat(2, minmax(0,1fr))} }

/* reef */
.reef .stage{height:100vh; height:100svh}
.reef-copy{position:absolute; left:0; right:0; top:clamp(88px, 14vh, 140px); z-index:2; padding:0 var(--gutter); max-width:var(--max); margin:0 auto}
.reef-copy h2{max-width:11ch; text-shadow:0 2px 26px rgba(6,12,26,.7)}
.reef-copy p{max-width:36ch; margin-top:16px; color:#D3DCEA; text-shadow:0 1px 14px rgba(6,12,26,.9)}
.toggle{position:absolute; right:var(--gutter); top:clamp(88px, 14vh, 140px); z-index:3; display:flex; padding:4px; gap:4px; border-radius:999px; background:linear-gradient(180deg, rgba(13,28,54,.85), rgba(6,12,26,.7)); border:1px solid var(--line); backdrop-filter:blur(8px); box-shadow:0 14px 30px rgba(2,6,16,.5), inset 0 1px 0 rgba(234,240,248,.1)}
.toggle button{all:unset; cursor:pointer; font:500 .8rem/1 var(--mono); letter-spacing:.08em; text-transform:uppercase; padding:10px 14px; border-radius:999px; color:var(--mute); min-height:24px; transition:background .25s, color .25s, box-shadow .25s}
.toggle button[aria-pressed="true"]{background:linear-gradient(180deg, #FFFFFF, #C9D7EA); color:var(--abyss); box-shadow:inset 0 1px 0 rgba(255,255,255,.95), 0 4px 10px rgba(2,6,16,.45)}
.toggle button:focus-visible{outline:2px solid var(--actinic)}
.reef .reef-still{display:block}
.reef canvas,.reef .still{transition:filter .9s ease}
.reef.daylight canvas,.reef.daylight .still{filter:hue-rotate(-28deg) saturate(.72) brightness(1.18) contrast(.95) sepia(.12)}
@media (max-width:760px){ .toggle{top:auto; bottom:20px; right:50%; transform:translateX(50%)} .reef-copy{top:96px} }

/* gallery */
.real{padding:clamp(96px, 14vh, 170px) 0}
.real header{margin-bottom:36px; max-width:640px}
.real header p{margin-top:16px; color:var(--mute)}
.strip{display:grid; grid-template-columns:1.6fr 1fr 1fr; grid-template-rows:auto auto; gap:14px}
.strip figure{margin:0; position:relative; overflow:hidden; border-radius:10px; background:var(--glass); border:1px solid var(--line); box-shadow:0 18px 38px rgba(2,6,16,.5)}
.strip figure img{width:100%; height:100%; object-fit:cover}
.strip figure:first-child{grid-row:span 2}
.strip figcaption{position:absolute; left:10px; bottom:10px; font:500 .72rem/1.2 var(--mono); background:rgba(6,12,26,.75); padding:6px 9px; border-radius:6px; color:var(--foam)}
@media (max-width:760px){ .strip{grid-template-columns:1fr 1fr} .strip figure:first-child{grid-column:span 2; grid-row:auto} }

/* supplies */
.supplies{padding:clamp(80px, 12vh, 140px) 0; border-top:1px solid var(--line); background:linear-gradient(180deg, var(--abyss), #081226)}
.supplies h2{font-size:clamp(2.4rem, 4.6vw, 4.2rem)}
.supplies .grid{display:grid; grid-template-columns:1fr 1.3fr; gap:clamp(32px, 6vw, 80px); align-items:start}
.supplies p.lead{color:var(--mute); margin-top:18px; max-width:40ch}
.chips{display:flex; flex-wrap:wrap; gap:10px}
.chip{display:inline-flex; align-items:center; gap:10px; padding:12px 16px; border:1px solid var(--line); border-radius:10px; text-decoration:none; color:var(--foam); background:linear-gradient(180deg, rgba(21,42,78,.75), rgba(13,28,54,.55)); font-weight:500; transition:border-color .25s, background .25s, transform .25s, box-shadow .25s; min-height:44px; box-shadow:0 8px 18px rgba(2,6,16,.38), inset 0 1px 0 rgba(234,240,248,.08)}
.chip:hover{border-color:var(--actinic); background:linear-gradient(180deg, rgba(46,75,255,.28), rgba(46,75,255,.1)); transform:translateY(-2px); box-shadow:0 14px 26px rgba(2,6,16,.45), inset 0 1px 0 rgba(234,240,248,.14)}
.chip:active{transform:translateY(0) scale(.98)}
.chip small{font:400 .72rem/1 var(--mono); color:var(--mute)}
.deal{margin-top:22px; padding:18px 20px; border:1px dashed rgba(255,184,107,.5); border-radius:12px; color:#F4DEC4; font-size:.95rem; background:linear-gradient(180deg, rgba(255,184,107,.09), rgba(255,184,107,.03)); box-shadow:inset 0 1px 0 rgba(255,184,107,.14), 0 12px 26px rgba(2,6,16,.35)}
.deal code{font:600 .95rem var(--mono); color:var(--coral)}
@media (max-width:860px){ .supplies .grid{grid-template-columns:1fr} }

/* services */
.services{padding:clamp(80px, 12vh, 140px) 0}
.svc{display:grid; grid-template-columns:repeat(auto-fill, minmax(240px, 1fr)); gap:1px; background:var(--line); border:1px solid var(--line); border-radius:14px; overflow:hidden; margin-top:32px; box-shadow:0 22px 44px rgba(2,6,16,.5)}
.svc a{background:linear-gradient(180deg, #0B1834, var(--abyss) 82%); padding:20px; text-decoration:none; display:flex; justify-content:space-between; gap:14px; align-items:baseline; transition:background .25s}
.svc a:hover{background:linear-gradient(180deg, #13264D, var(--glass) 82%)}
.svc b{font-weight:500}
.svc span{font:500 .9rem var(--mono); color:var(--coral); white-space:nowrap}

/* visit */
.visit{padding:clamp(80px, 12vh, 140px) 0 clamp(60px, 8vh, 100px)}
.visit .grid{display:grid; grid-template-columns:1.25fr 1fr; gap:clamp(28px, 5vw, 64px); align-items:center}
.visit figure{margin:0; border-radius:14px; overflow:hidden; border:1px solid var(--line); box-shadow:0 24px 48px rgba(2,6,16,.55)}
.visit dl{display:grid; grid-template-columns:auto 1fr; gap:10px 22px; margin:26px 0 30px}
.visit dt{font:500 .74rem/1.9 var(--mono); letter-spacing:.12em; text-transform:uppercase; color:var(--mute)}
.visit dd{margin:0; overflow-wrap:anywhere}
.visit .grid>*,.supplies .grid>*{min-width:0}
.hours{width:100%; border-collapse:collapse; font-size:.95rem}
.hours td{padding:4px 0; border-bottom:1px solid var(--line)}
.hours td:last-child{text-align:right; font-family:var(--mono); font-size:.88rem}
.hours tr.today td{color:var(--coral)}
@media (max-width:860px){ .visit .grid{grid-template-columns:1fr} }

footer{border-top:1px solid var(--line); padding:40px 0 56px; color:var(--mute); font-size:.88rem}
footer .wrap{display:flex; gap:24px; justify-content:space-between; align-items:center; flex-wrap:wrap}
footer .brand img{width:56px; height:56px}
footer nav{display:flex; gap:18px; flex-wrap:wrap}
footer a{color:var(--mute)} footer a:hover{color:var(--foam)}
.demo-note{font:400 .74rem/1.5 var(--mono); max-width:60ch}

@media (prefers-reduced-motion:reduce){ *{transition:none !important; animation:none !important} }