@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@200;300;400;500;600;700;800&family=Courier+Prime:wght@400;700&display=swap');

:root {
  --lab: #f8f9fe;
  --glass: #eef0fa;
  --beaker: #e4e8f6;
  --dark: #1a1a2e;
  --deep-blue: #16213e;
  --react-red: #e63946;
  --react-orange: #f4a261;
  --react-green: #2a9d8f;
  --react-blue: #457b9d;
  --react-purple: #7b2d8b;
  --react-yellow: #f9c74f;
  --energy: #ff6b6b;
  --endothermic: #4ecdc4;
  --border: rgba(70,100,180,0.14);
  --text: #3a4060;
  --text-bright: #1a2040;
  --text-muted: #7a84a0;
  --accent: #3060d0;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
body{font-family:'Poppins',sans-serif;background:var(--lab);color:var(--text);min-height:100vh;overflow-x:hidden;}
#react-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 ── */
.hero{padding:68px 0 52px;border-bottom:1px solid var(--border);margin-bottom:58px;}
.hero-tag{font-size:0.58rem;letter-spacing:5px;text-transform:uppercase;color:var(--accent);opacity:0.6;margin-bottom:14px;font-weight:600;}
.hero h1{font-size:clamp(3.5rem,10vw,7rem);font-weight:800;line-height:0.88;color:var(--dark);letter-spacing:-2px;}
.hero h1 em{display:block;font-size:0.22em;font-style:normal;font-weight:300;letter-spacing:5px;color:var(--text-muted);margin-top:12px;font-family:'Courier Prime',monospace;text-transform:uppercase;}
.hero-desc{font-size:0.97rem;line-height:1.87;color:var(--text);font-weight:300;margin-top:18px;max-width:600px;}

/* ── Live reaction canvas ── */
#live-canvas{display:block;width:100%;margin-bottom:58px;border:1px solid var(--border);border-radius:6px;background:var(--dark);}

/* ── Stats ── */
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(148px,1fr));border:1px solid var(--border);overflow:hidden;margin-bottom:56px;border-radius:4px;}
.stat{padding:18px 14px;background:var(--glass);border-right:1px solid var(--border);transition:background 0.2s;}
.stat:last-child{border-right:none;} .stat:hover{background:var(--beaker);}
.s-label{font-family:'Courier Prime',monospace;font-size:0.52rem;letter-spacing:2px;text-transform:uppercase;color:var(--accent);opacity:0.7;margin-bottom:7px;}
.s-value{font-size:1.05rem;font-weight:700;color:var(--dark);line-height:1.1;}
.s-unit{font-size:0.6rem;color:var(--text-muted);}

/* ── Sections ── */
.section{margin-bottom:54px;opacity:0;transform:translateY(18px);transition:opacity 0.65s,transform 0.65s;}
.section.visible{opacity:1;transform:none;}
.sh{display:flex;align-items:baseline;gap:14px;margin-bottom:20px;padding-bottom:12px;border-bottom:1px solid var(--border);}
.sn{font-family:'Courier Prime',monospace;font-size:0.55rem;letter-spacing:3px;color:var(--accent);opacity:0.5;}
.section h2{font-size:1.5rem;font-weight:800;color:var(--dark);letter-spacing:-0.5px;}
p{font-size:0.95rem;line-height:1.87;color:var(--text);font-weight:300;margin-bottom:14px;}
strong{color:var(--text-bright);font-weight:600;}

/* ── Reaction types ── */
.react-types{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:10px;margin-top:18px;}
.rt-card{background:var(--glass);border:1px solid var(--border);border-radius:4px;padding:18px;border-top:3px solid;transition:background 0.2s;}
.rt-card:hover{background:var(--beaker);}
.rt-card h3{font-size:0.85rem;font-weight:700;color:var(--dark);margin-bottom:4px;text-transform:uppercase;letter-spacing:0.5px;}
.rt-eq{font-family:'Courier Prime',monospace;font-size:0.75rem;color:var(--text-muted);margin-bottom:8px;}
.rt-card p{font-size:0.78rem;margin:0;line-height:1.55;}

/* ── Energy diagram ── */
.energy-wrap{background:var(--dark);border:1px solid var(--border);border-radius:6px;padding:20px;margin-top:18px;text-align:center;}
#energy-canvas{display:block;margin:0 auto 10px;}
.en-cap{font-family:'Courier Prime',monospace;font-size:0.6rem;color:rgba(200,210,255,0.3);letter-spacing:2px;text-transform:uppercase;}

/* ── Factors grid ── */
.factors-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:10px;margin-top:18px;}
.factor-card{background:var(--glass);border:1px solid var(--border);border-left:3px solid var(--accent);padding:16px;border-radius:0 4px 4px 0;transition:background 0.2s,border-left-color 0.2s;}
.factor-card:hover{background:var(--beaker);}
.factor-card h3{font-size:0.82rem;font-weight:700;color:var(--dark);margin-bottom:6px;}
.factor-card p{font-size:0.78rem;margin:0;line-height:1.55;}

/* ── Famous reactions ── */
.famous-list{margin-top:18px;}
.famous-item{background:var(--glass);border:1px solid var(--border);border-radius:4px;padding:18px;margin-bottom:10px;display:grid;grid-template-columns:auto 1fr;gap:16px;align-items:start;transition:background 0.2s;}
.famous-item:hover{background:var(--beaker);}
.fi-icon{font-size:1.5rem;flex-shrink:0;}
.fi-eq{font-family:'Courier Prime',monospace;font-size:0.82rem;color:var(--react-blue);margin-bottom:4px;font-weight:700;}
.fi-name{font-size:0.88rem;font-weight:700;color:var(--dark);margin-bottom:4px;}
.fi-desc{font-size:0.8rem;color:var(--text);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:'Courier Prime',monospace;font-size:0.52rem;letter-spacing:2px;color:var(--text-muted);text-transform:uppercase;}
@media(max-width:600px){.react-types{grid-template-columns:1fr;} .famous-item{grid-template-columns:1fr;}}