/* ============================================================
   QuantMechanica — Shared Stylesheet
   Brand: #000 bg · #10b981 emerald accent · #f5f5f7 text
   Fonts: Inter (body) · Source Code Pro (data/code)
   ============================================================ */

/* ── Reset & Tokens ──────────────────────────────────────── */
*{margin:0;padding:0;box-sizing:border-box}
:root{
  --white:#f5f5f7;
  --g1:#86868b;
  --g2:#6e6e73;
  --g3:#424245;
  --bg:#000;
  --surface:#0a0a0f;
  --card:rgba(255,255,255,0.03);
  --card-h:rgba(255,255,255,0.06);
  --border:rgba(255,255,255,0.06);
  --border-h:rgba(255,255,255,0.14);
  --em:#10b981;
  --em-l:#34d399;
  --em-m:rgba(16,185,129,0.7);
  --em-s:rgba(16,185,129,0.12)
}
::selection{background:rgba(16,185,129,0.25);color:#fff}
html{scroll-behavior:smooth}
body{min-height:100vh;background:var(--bg);color:var(--white);font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}

/* ── Animations ──────────────────────────────────────────── */
@keyframes fadeUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}
@keyframes breathe{0%,100%{opacity:.5}50%{opacity:1}}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-6px)}}
@keyframes scroll{from{transform:translateX(0)}to{transform:translateX(-50%)}}
.fade{animation:fadeUp .8s cubic-bezier(.16,1,.3,1) forwards;opacity:0}

/* ── Nav ─────────────────────────────────────────────────── */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;padding:0 48px;height:52px;display:flex;justify-content:space-between;align-items:center;transition:all .35s ease}
.nav.scrolled,.nav.nav-always-solid{background:rgba(0,0,0,.72);backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px);border-bottom:.5px solid var(--border)}
.nav-logo{display:flex;align-items:center;gap:10px}
.nav-logo-text{font-size:17px;font-weight:600;letter-spacing:-.3px}
.nav-logo-text .logo-quant{color:var(--white)}
.nav-logo-text .logo-mechanica{color:var(--em)}
.nav-dot{width:6px;height:6px;border-radius:50%;background:var(--em);box-shadow:0 0 8px var(--em);animation:breathe 3s ease-in-out infinite}
.nav-links{display:flex;gap:28px;font-size:12px;font-weight:400;color:var(--g1)}
.nav-links a{transition:color .2s}
.nav-links a:hover{color:var(--white)}
.nav-links a.active{color:var(--em)}

/* ── Hamburger menu (CSS-only, checkbox hack) ────────────── */
.hamburger-toggle{display:none}
.hamburger-label{display:none;cursor:pointer;width:28px;height:20px;position:relative;z-index:110}
.hamburger-label span,
.hamburger-label span::before,
.hamburger-label span::after{display:block;position:absolute;width:100%;height:2px;background:var(--g1);border-radius:2px;transition:all .3s ease}
.hamburger-label span{top:9px}
.hamburger-label span::before{content:'';top:-7px}
.hamburger-label span::after{content:'';top:7px}
.hamburger-toggle:checked + .hamburger-label span{background:transparent}
.hamburger-toggle:checked + .hamburger-label span::before{top:0;transform:rotate(45deg);background:var(--em)}
.hamburger-toggle:checked + .hamburger-label span::after{top:0;transform:rotate(-45deg);background:var(--em)}

.mobile-nav{display:none;position:fixed;top:52px;left:0;right:0;bottom:0;background:rgba(0,0,0,.96);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);z-index:99;flex-direction:column;align-items:center;justify-content:center;gap:28px;opacity:0;pointer-events:none;transition:opacity .3s ease}
.hamburger-toggle:checked ~ .mobile-nav{opacity:1;pointer-events:auto}
.mobile-nav a{font-size:18px;font-weight:500;color:var(--g1);transition:color .2s}
.mobile-nav a:hover{color:var(--white)}
.mobile-nav a.active{color:var(--em)}

/* ── Buttons ─────────────────────────────────────────────── */
.btn-primary{display:inline-flex;align-items:center;padding:14px 28px;border-radius:980px;background:var(--em);color:#000;font-size:15px;font-weight:600;transition:all .25s;border:none;cursor:pointer}
.btn-primary:hover{transform:scale(1.03);box-shadow:0 4px 24px rgba(16,185,129,.25);background:var(--em-l)}
.btn-secondary{display:inline-flex;align-items:center;padding:14px 28px;border-radius:980px;background:transparent;color:var(--g1);font-size:15px;font-weight:500;border:.5px solid var(--g3);transition:all .25s;cursor:pointer}
.btn-secondary:hover{border-color:var(--g1);color:var(--white)}

/* ── Section ─────────────────────────────────────────────── */
.section{padding:140px 48px}
.section-inner{max-width:1120px;margin:0 auto}
.section-border{border-top:.5px solid var(--border)}
.section-tag{font-size:14px;font-weight:500;color:var(--em);margin-bottom:16px;letter-spacing:1px;text-transform:uppercase}
.section-title{font-size:clamp(36px,5vw,56px);font-weight:600;letter-spacing:-1.5px;line-height:1.08;margin-bottom:20px}
.section-title-md{font-size:clamp(32px,4vw,48px);letter-spacing:-1px;line-height:1.1}
.section-desc{font-size:17px;color:var(--g2);line-height:1.6}

/* ── Ticker ──────────────────────────────────────────────── */
.ticker{height:36px;display:flex;align-items:center;overflow:hidden;border-top:.5px solid rgba(16,185,129,.1);border-bottom:.5px solid rgba(16,185,129,.1);background:rgba(16,185,129,.015)}
.ticker-inner{display:flex;gap:48px;white-space:nowrap;animation:scroll 40s linear infinite;font-family:'Source Code Pro',monospace;font-size:11px;color:rgba(16,185,129,.35);letter-spacing:.5px}

/* ── Footer (legacy simple) ──────────────────────────────── */
footer.legacy{padding:20px 48px;border-top:.5px solid var(--border);display:flex;justify-content:space-between;align-items:center}
.footer-dot{width:5px;height:5px;border-radius:50%;background:var(--em);box-shadow:0 0 6px var(--em)}

/* ── Site Footer (comprehensive) ─────────────────────────── */
.site-footer{border-top:.5px solid var(--border);margin-top:0}
.site-footer-inner{max-width:1120px;margin:0 auto;padding:48px 48px 32px;display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:48px}
.footer-brand{display:flex;flex-direction:column;gap:12px}
.footer-tagline{font-size:13px;color:var(--g3);line-height:1.5;max-width:280px}
.footer-col{display:flex;flex-direction:column;gap:10px}
.footer-col h4{font-size:12px;font-weight:600;color:var(--em);letter-spacing:.8px;text-transform:uppercase;margin-bottom:4px}
.footer-col a{font-size:13px;color:var(--g2);text-decoration:none;transition:color .2s}
.footer-col a:hover{color:var(--white)}
.footer-bottom{max-width:1120px;margin:0 auto;padding:16px 48px;border-top:.5px solid var(--border);font-size:11px;color:var(--g3)}
.footer-risk{padding:16px 48px 20px;background:rgba(245,158,11,0.03);border-top:2px solid rgba(245,158,11,0.2)}
.footer-risk-inner{max-width:1120px;margin:0 auto}
.footer-risk h5{font-size:12px;font-weight:600;color:#f59e0b;margin-bottom:6px;letter-spacing:.3px}
.footer-risk p{font-size:11px;color:var(--g3);line-height:1.6}

/* ── Responsive ──────────────────────────────────────────── */
@media(max-width:900px){
  .nav{padding:0 20px}
  .nav-links{display:none}

  /* Show hamburger */
  .hamburger-label{display:block}
  .mobile-nav{display:flex}

  .section{padding:80px 20px}
  footer.legacy{flex-direction:column;gap:12px;text-align:center;padding:20px}
  .site-footer-inner{grid-template-columns:1fr;gap:32px;padding:32px 20px 24px}
  .footer-bottom{padding:16px 20px}
  .footer-risk{padding:16px 20px}
}