@import url('https://fonts.googleapis.com/css2?family=Quicksand:wght@300;400;500;600;700&family=Inconsolata:wght@300;400;500&display=swap');
:root{--sky:#e8f4ff;--cloud:#d0e8ff;--deep-sky:#0a3a6e;--oxygen:#1a88d0;--fresh:#00c8a0;--breath:rgba(0,200,255,0.1);--border:rgba(10,60,120,0.14);--text:#2a5070;--text-bright:#0a3060;--white:#f0faff;}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
body{font-family:'Quicksand',sans-serif;background:var(--sky);color:var(--text);min-height:100vh;overflow-x:hidden;}
#o-canvas{position:fixed;inset:0;z-index:0;pointer-events:none;}
body::before{content:'O';position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);font-family:'Inconsolata',monospace;font-size:55vw;font-weight:500;opacity:0.04;z-index:1;pointer-events:none;color:var(--oxygen);}
.wrap{position:relative;z-index:2;max-width:1020px;margin:0 auto;padding:0 28px 90px;}
.hero{padding:64px 0 50px;display:grid;grid-template-columns:1fr 220px;gap:40px;align-items:center;border-bottom:1px solid var(--border);margin-bottom:52px;}
.hero-tag{font-family:'Inconsolata',monospace;font-size:0.58rem;letter-spacing:4px;text-transform:uppercase;color:var(--oxygen);opacity:0.7;margin-bottom:12px;}
.hero h1{font-size:clamp(4rem,11vw,7.5rem);font-weight:700;line-height:0.85;color:var(--deep-sky);letter-spacing:-2px;}
.hero h1 em{display:block;font-size:0.2em;font-style:normal;font-weight:400;letter-spacing:5px;color:rgba(10,60,120,0.4);margin-top:12px;font-family:'Inconsolata',monospace;text-transform:uppercase;}
.hero-desc{font-size:0.95rem;line-height:1.87;color:var(--text);font-weight:400;margin-top:16px;}
.periodic-card{width:200px;height:200px;background:linear-gradient(135deg,#fff,var(--cloud));border:1px solid var(--border);border-radius:8px;padding:16px;display:flex;flex-direction:column;justify-content:space-between;box-shadow:0 4px 24px rgba(10,80,180,0.1);}
.pc-num{font-family:'Inconsolata',monospace;font-size:0.85rem;color:var(--oxygen);opacity:0.7;}
.pc-symbol{font-family:'Inconsolata',monospace;font-size:4.5rem;font-weight:500;color:var(--deep-sky);line-height:1;text-align:center;}
.pc-name{font-size:0.78rem;font-weight:700;color:var(--oxygen);text-align:center;letter-spacing:2px;text-transform:uppercase;}
.pc-mass{font-family:'Inconsolata',monospace;font-size:0.7rem;color:rgba(10,60,120,0.4);text-align:right;}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(145px,1fr));border:1px solid var(--border);overflow:hidden;margin-bottom:52px;border-radius:4px;background:#fff;}
.stat{padding:16px 12px;border-right:1px solid var(--border);transition:background 0.2s;}.stat:last-child{border-right:none;}.stat:hover{background:var(--cloud);}
.s-label{font-family:'Inconsolata',monospace;font-size:0.52rem;letter-spacing:2px;text-transform:uppercase;color:var(--oxygen);opacity:0.65;margin-bottom:6px;}
.s-value{font-size:1rem;font-weight:700;color:var(--deep-sky);line-height:1.1;}
.s-unit{font-size:0.6rem;color:rgba(10,60,120,0.4);}
.section{margin-bottom:50px;opacity:0;transform:translateY(16px);transition:opacity 0.65s,transform 0.65s;}.section.visible{opacity:1;transform:none;}
.sh{display:flex;align-items:baseline;gap:14px;margin-bottom:18px;padding-bottom:12px;border-bottom:1px solid var(--border);}
.sn{font-family:'Inconsolata',monospace;font-size:0.55rem;letter-spacing:3px;color:var(--oxygen);opacity:0.5;}
.section h2{font-size:1.4rem;font-weight:700;color:var(--deep-sky);}
p{font-size:0.95rem;line-height:1.87;color:var(--text);font-weight:400;margin-bottom:14px;}
strong{color:var(--text-bright);font-weight:700;}
.forms-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:10px;margin-top:16px;}
.fc{background:#fff;border:1px solid var(--border);border-top:3px solid var(--oxygen);border-radius:4px;padding:18px;transition:background 0.2s;}.fc:hover{background:var(--cloud);}
.fc h3{font-size:0.82rem;font-weight:700;color:var(--deep-sky);margin-bottom:6px;}
.fc p{font-size:0.78rem;margin:0;line-height:1.55;}
.uses-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:10px;margin-top:16px;}
.uc{background:#fff;border:1px solid var(--border);border-left:3px solid var(--fresh);padding:14px;transition:background 0.2s;}.uc:hover{background:var(--cloud);}
.uc h3{font-size:0.8rem;font-weight:700;color:var(--deep-sky);margin-bottom:5px;}
.uc p{font-size:0.78rem;margin:0;line-height:1.5;}
.disc-box{background:#fff;border:1px solid var(--border);border-left:3px solid var(--oxygen);padding:22px 24px;margin-top:16px;}
.disc-box h3{font-size:0.82rem;font-weight:700;color:var(--deep-sky);margin-bottom:10px;}
.disc-box p{margin:0 0 10px;}.disc-box p:last-child{margin:0;}
.footer-band{margin-top:70px;border-top:1px solid var(--border);padding-top:20px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;}
.footer-band span{font-family:'Inconsolata',monospace;font-size:0.52rem;letter-spacing:2px;color:rgba(10,60,120,0.4);text-transform:uppercase;}
@media(max-width:600px){.hero{grid-template-columns:1fr;} .periodic-card{width:150px;height:150px;margin:0 auto;}}