[data-theme="dark"]{--bg:#040d1a;--glass:rgba(255,255,255,0.04);--glass-border:rgba(255,255,255,0.09);--cyan:#00e5ff;--cyan-dim:rgba(0,229,255,0.12);--mint:#00ffb3;--mint-dim:rgba(0,255,179,0.12);--amber:#ffb700;--amber-dim:rgba(255,183,0,0.13);--purple:#b47aff;--purple-dim:rgba(180,122,255,0.12);--red:#ff4d6d;--red-dim:rgba(255,77,109,0.13);--text:#c8d8f0;--text-dim:#6888aa;--text-bright:#eaf4ff;--card-bg:rgba(255,255,255,0.04);--card-border:rgba(255,255,255,0.09);--card-hover:rgba(255,255,255,0.07);--orb-opacity:0.16}
[data-theme="light"]{--bg:#f0f4fa;--glass:rgba(255,255,255,0.7);--glass-border:rgba(80,120,200,0.15);--cyan:#0080aa;--cyan-dim:rgba(0,128,170,0.1);--mint:#007a55;--mint-dim:rgba(0,122,85,0.1);--amber:#b07800;--amber-dim:rgba(176,120,0,0.1);--purple:#7040b0;--purple-dim:rgba(112,64,176,0.1);--red:#c0203a;--red-dim:rgba(192,32,58,0.1);--text:#1a2a44;--text-dim:#5a7090;--text-bright:#0a1830;--card-bg:rgba(255,255,255,0.82);--card-border:rgba(80,130,200,0.18);--card-hover:rgba(255,255,255,0.95);--orb-opacity:0.10}
*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{background:var(--bg);color:var(--text);font-family:'Inter',sans-serif;min-height:100vh;overflow-x:hidden;transition:background 0.4s,color 0.4s}
.bg-canvas{position:fixed;inset:0;z-index:0;pointer-events:none;overflow:hidden}.orb{position:absolute;border-radius:50%;filter:blur(100px);opacity:var(--orb-opacity);animation:drift 22s ease-in-out infinite alternate}.orb1{width:700px;height:700px;background:var(--purple);top:-250px;left:-200px}.orb2{width:550px;height:550px;background:var(--cyan);bottom:-150px;right:-150px;animation-delay:-8s}@keyframes drift{from{transform:translate(0,0) scale(1)}to{transform:translate(60px,80px) scale(1.1)}}
.grid-overlay{position:fixed;inset:0;z-index:0;pointer-events:none;background-image:linear-gradient(rgba(180,122,255,0.02) 1px,transparent 1px),linear-gradient(90deg,rgba(180,122,255,0.02) 1px,transparent 1px);background-size:42px 42px}[data-theme="light"] .grid-overlay{background-image:linear-gradient(rgba(0,80,150,0.04) 1px,transparent 1px),linear-gradient(90deg,rgba(0,80,150,0.04) 1px,transparent 1px)}
.main{position:relative;z-index:1;max-width:960px;margin:0 auto;padding:2.5rem 1.5rem 5rem}@media(min-width:768px){.main{padding:3.5rem 2rem 6rem}}
.topbar{display:flex;align-items:center;justify-content:space-between;margin-bottom:2.5rem;flex-wrap:wrap;gap:0.8rem}.topbar-left{display:flex;align-items:center;gap:0.8rem}
.ctrl-btn{display:flex;align-items:center;gap:0.5rem;font-family:'DM Mono',monospace;font-size:0.65rem;letter-spacing:0.08em;padding:0.42rem 0.9rem;border-radius:100px;border:1px solid var(--glass-border);background:var(--glass);color:var(--text-dim);cursor:pointer;transition:all 0.2s;backdrop-filter:blur(8px);white-space:nowrap;text-decoration:none}.ctrl-btn:hover{border-color:var(--purple);color:var(--purple);background:var(--purple-dim)}.ctrl-btn svg{width:13px;height:13px;flex-shrink:0}
.hero{text-align:center;margin-bottom:3rem;animation:heroIn 0.9s cubic-bezier(0.22,1,0.36,1) both}@keyframes heroIn{from{opacity:0;transform:translateY(-28px)}to{opacity:1;transform:translateY(0)}}
.hero h1{font-size:clamp(1.8rem,4.5vw,2.8rem);font-weight:900;line-height:1.1;letter-spacing:-0.04em;color:var(--text-bright);margin-bottom:0.3rem}.hero h1 .g{background:linear-gradient(120deg,var(--purple),var(--cyan));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-sub{font-family:'Playfair Display',Georgia,serif;font-style:italic;font-size:0.95rem;color:var(--text-dim);margin-bottom:0.6rem}.hero-desc{font-size:0.88rem;color:var(--text-dim);max-width:600px;margin:0 auto;line-height:1.7}
.section-label{font-family:'DM Mono',monospace;font-size:0.6rem;letter-spacing:0.2em;text-transform:uppercase;color:var(--purple);margin-bottom:1.2rem;padding-left:0.2rem}
.card{background:var(--card-bg);border:1px solid var(--card-border);border-radius:18px;padding:1.8rem;backdrop-filter:blur(18px);margin-bottom:1.5rem}
.step-list{list-style:none;counter-reset:steps}.step-list li{counter-increment:steps;font-size:0.82rem;color:var(--text);line-height:1.7;padding:0.4rem 0 0.4rem 2rem;position:relative;border-bottom:1px solid var(--glass-border)}.step-list li:last-child{border-bottom:none}.step-list li::before{content:counter(steps);position:absolute;left:0;top:0.45rem;font-family:'DM Mono',monospace;font-size:0.6rem;font-weight:700;width:1.4rem;height:1.4rem;background:var(--purple-dim);border:1px solid rgba(180,122,255,0.2);color:var(--purple);border-radius:50%;display:flex;align-items:center;justify-content:center}
.spec-grid{display:grid;gap:0.8rem;margin:0.8rem 0}@media(min-width:640px){.spec-grid{grid-template-columns:1fr 1fr 1fr 1fr}}
.spec-item{background:var(--card-hover);border:1px solid var(--glass-border);border-radius:12px;padding:1rem;text-align:center}.spec-value{font-size:1.2rem;font-weight:900;color:var(--text-bright)}.spec-label{font-family:'DM Mono',monospace;font-size:0.5rem;letter-spacing:0.1em;text-transform:uppercase;color:var(--text-dim);margin-top:0.2rem}
.eq-table{width:100%;border-collapse:collapse;font-size:0.75rem;margin:0.8rem 0}.eq-table th{font-family:'DM Mono',monospace;font-size:0.5rem;letter-spacing:0.1em;text-transform:uppercase;color:var(--purple);text-align:center;padding:0.45rem 0.5rem;border-bottom:2px solid var(--purple-dim)}.eq-table td{padding:0.35rem 0.5rem;border-bottom:1px solid var(--glass-border);color:var(--text);text-align:center}.eq-table tr:hover td{background:var(--card-hover)}
.highlight{font-family:'DM Mono',monospace;font-size:0.7rem;color:var(--purple)}
.formula{background:var(--card-hover);border:1px solid var(--glass-border);border-radius:12px;padding:1rem 1.5rem;font-family:'DM Mono',monospace;font-size:0.8rem;color:var(--text-bright);text-align:center;margin:0.8rem 0;line-height:1.8}
.formula .var{color:var(--purple);font-weight:700}
.footer{text-align:center;font-family:'DM Mono',monospace;font-size:0.58rem;letter-spacing:0.14em;color:var(--text-dim);text-transform:uppercase;margin-top:2rem}
.reveal{opacity:0;transform:translateY(30px);transition:opacity 0.7s ease,transform 0.7s ease}.reveal.visible{opacity:1;transform:translateY(0)}
@media(max-width:500px){.hero h1{font-size:1.6rem}.eq-table{font-size:0.65rem}}@media print{.bg-canvas,.grid-overlay,.topbar{display:none!important}body{background:white;color:#111}.card{border:1px solid #ccc;backdrop-filter:none}}