/* electromagnetisme.css */
@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;500;600;700;900&family=Rajdhani:wght@300;400;500;600;700&display=swap');
:root{--bg:#010308;--deep:#02060f;--surface:#040d1e;--electric:#00d4ff;--elec-dim:rgba(0,212,255,0.08);--elec-border:rgba(0,212,255,0.2);--magnetic:#c040ff;--mag-dim:rgba(192,64,255,0.08);--em-wave:#00ffaa;--text:#2a6080;--text-bright:#60b8e0;--text-dim:#061020;--border:rgba(0,212,255,0.15);--white:#d0f0ff;}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
body{font-family:'Rajdhani',sans-serif;background:var(--bg);color:var(--text);min-height:100vh;overflow-x:hidden;}
#em-canvas{position:fixed;inset:0;z-index:0;pointer-events:none;}
.wrap{position:relative;z-index:2;max-width:1040px;margin:0 auto;padding:0 28px 90px;}
.hero{padding:68px 0 52px;display:grid;grid-template-columns:1fr 300px;gap:44px;align-items:center;border-bottom:1px solid var(--border);margin-bottom:56px;}
.hero-tag{font-family:'Orbitron',sans-serif;font-size:0.5rem;letter-spacing:4px;text-transform:uppercase;color:var(--electric);opacity:0.55;margin-bottom:14px;}
.hero h1{font-family:'Orbitron',sans-serif;font-size:clamp(2.5rem,7vw,5rem);font-weight:900;line-height:0.9;color:var(--white);letter-spacing:-1px;text-shadow:0 0 30px rgba(0,212,255,0.2);}
.hero h1 em{display:block;font-size:0.38em;font-style:normal;font-weight:400;letter-spacing:4px;color:var(--text-dim);text-shadow:none;margin-top:12px;font-family:'Rajdhani',sans-serif;text-transform:uppercase;}
.hero-desc{font-size:0.96rem;line-height:1.87;color:var(--text);font-weight:400;margin-top:18px;}
.field-wrap{background:var(--deep);border:1px solid var(--elec-border);border-radius:6px;padding:16px;text-align:center;box-shadow:0 0 20px var(--elec-dim);}
#field-canvas{display:block;margin:0 auto;}
.field-cap{font-family:'Orbitron',sans-serif;font-size:0.48rem;color:rgba(0,212,255,0.3);letter-spacing:2px;text-transform:uppercase;margin-top:8px;}
/* Maxwell equations */
.maxwell{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-bottom:56px;}
.mxw{background:var(--surface);border:1px solid var(--elec-border);padding:16px 20px;border-radius:3px;transition:background 0.2s;}.mxw:hover{background:var(--elec-dim);}
.mxw-label{font-family:'Orbitron',sans-serif;font-size:0.48rem;letter-spacing:2px;text-transform:uppercase;color:var(--electric);opacity:0.5;margin-bottom:6px;}
.mxw-eq{font-family:'Rajdhani',sans-serif;font-size:1.1rem;font-weight:600;color:var(--white);margin-bottom:4px;}
.mxw p{font-size:0.78rem;color:var(--text);margin:0;line-height:1.5;}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(145px,1fr));border:1px solid var(--border);overflow:hidden;margin-bottom:56px;}
.stat{padding:16px 12px;background:var(--deep);border-right:1px solid var(--border);transition:background 0.2s;}.stat:last-child{border-right:none;}.stat:hover{background:var(--elec-dim);}
.s-label{font-family:'Orbitron',sans-serif;font-size:0.48rem;letter-spacing:2px;text-transform:uppercase;color:var(--electric);opacity:0.5;margin-bottom:6px;}
.s-value{font-size:1rem;font-weight:700;color:var(--white);line-height:1.1;}
.s-unit{font-size:0.6rem;color:var(--text-dim);}
.section{margin-bottom:52px;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:'Orbitron',sans-serif;font-size:0.45rem;letter-spacing:3px;color:var(--electric);opacity:0.4;}
.section h2{font-family:'Orbitron',sans-serif;font-size:1.1rem;font-weight:700;color:var(--white);letter-spacing:1px;text-transform:uppercase;}
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;}
.laws-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:10px;margin-top:16px;}
.lc{background:var(--surface);border:1px solid var(--border);padding:18px;transition:background 0.2s;}.lc:hover{background:var(--elec-dim);}
.lc h3{font-family:'Orbitron',sans-serif;font-size:0.7rem;color:var(--electric);margin-bottom:6px;text-transform:uppercase;letter-spacing:1px;}
.lc .leq{font-family:'Rajdhani',sans-serif;font-size:0.95rem;color:var(--white);margin-bottom:6px;font-weight:600;}
.lc p{font-size:0.78rem;margin:0;line-height:1.55;}
.apps-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:10px;margin-top:16px;}
.ap{background:var(--surface);border:1px solid var(--border);border-left:2px solid var(--electric);padding:16px;transition:background 0.2s;}.ap:hover{background:var(--elec-dim);}
.ap h3{font-size:0.82rem;font-weight:700;color:var(--white);margin-bottom:5px;text-transform:uppercase;letter-spacing:0.5px;}
.ap p{font-size:0.78rem;margin:0;line-height:1.55;}
.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:'Orbitron',sans-serif;font-size:0.45rem;letter-spacing:2px;color:var(--text-dim);text-transform:uppercase;}
@media(max-width:640px){.hero{grid-template-columns:1fr;} .maxwell{grid-template-columns:1fr;}}