/* ============================================================
   SpaceDog — Tesla-inspired design system
   Tokens from DESIGN.md. No UI shadows, no UI gradients.
   ============================================================ */
:root{
  --blue:#3E6AE1;
  --blue-dark:#2F56C4;
  --white:#FFFFFF;
  --carbon:#171A20;
  --space:#0B0E16;
  --space-2:#0F1320;
  --graphite:#393C41;
  --pewter:#5C5E62;
  --silver:#8E8E8E;
  --ash:#F4F4F4;
  --cloud:#EEEEEE;
  --pale:#D0D1D2;
  --r-btn:4px;
  --r-card:12px;
  --ease:cubic-bezier(.5,0,0,.75);
  --t:.33s;
  --font:'Inter','Inter Fallback',-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Hiragino Sans GB','Microsoft YaHei',Arial,sans-serif;
}
@font-face{font-family:'Inter';font-style:normal;font-weight:400;font-display:swap;src:url('../assets/fonts/inter-400.woff2') format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;}
@font-face{font-family:'Inter';font-style:normal;font-weight:500;font-display:swap;src:url('../assets/fonts/inter-500.woff2') format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;}
@font-face{font-family:'Inter Fallback';src:local('Arial');size-adjust:107%;ascent-override:90%;descent-override:22%;}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:var(--font);
  font-size:16px;line-height:1.6;color:var(--graphite);
  background:var(--white);
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer}
code{font-family:'SF Mono',Consolas,Menlo,monospace}

/* ---------- Nav ---------- */
.site-nav{
  position:fixed;inset:0 0 auto 0;z-index:100;
  transition:background-color var(--t) var(--ease),backdrop-filter var(--t),box-shadow 0s;
}
.nav-inner{
  max-width:1440px;margin:0 auto;padding:0 24px;height:64px;
  display:flex;align-items:center;gap:16px;
}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0}
.brand-mark{width:30px;height:30px;border-radius:50%;object-fit:cover}
.brand-word{
  font-size:15px;font-weight:500;letter-spacing:.34em;text-transform:lowercase;
  color:var(--white);transition:color var(--t);
  margin-right:-.34em; /* optical centering for letter-spacing */
}
.nav-links{display:flex;gap:2px;margin:0 auto}
.nav-links a{
  font-size:14px;font-weight:500;color:rgba(255,255,255,.88);
  padding:8px 14px;border-radius:var(--r-btn);
  transition:color var(--t) var(--ease),background-color var(--t) var(--ease);
}
.nav-links a:hover{color:#fff;background:rgba(255,255,255,.08)}
.nav-actions{display:flex;align-items:center;gap:6px;margin-left:auto}
.icon-link{
  width:34px;height:34px;border-radius:var(--r-btn);
  display:grid;place-items:center;color:rgba(255,255,255,.9);
  transition:color var(--t),background-color var(--t);
}
.icon-link:hover{background:rgba(255,255,255,.12);color:#fff}
.lang-toggle{
  border:1px solid rgba(255,255,255,.35);background:transparent;color:#fff;
  font-size:12.5px;font-weight:500;border-radius:var(--r-btn);
  padding:5px 10px;height:32px;letter-spacing:.04em;
  transition:border-color var(--t),background-color var(--t),color var(--t);
}
.lang-toggle:hover{border-color:#fff;background:rgba(255,255,255,.1)}
.nav-burger{display:none;width:34px;height:34px;background:transparent;border:none;flex-direction:column;align-items:center;justify-content:center;gap:5px}
.nav-burger span{width:20px;height:2px;background:#fff;border-radius:2px;transition:transform var(--t),opacity var(--t)}
.nav-burger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-burger.open span:nth-child(2){opacity:0}
.nav-burger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* nav turns white/frosted when scrolled past hero or when menu open */
.site-nav.solid{
  background:rgba(255,255,255,.78);
  -webkit-backdrop-filter:blur(18px) saturate(1.4);backdrop-filter:blur(18px) saturate(1.4);
  border-bottom:1px solid var(--cloud);
}
.site-nav.solid .brand-word{color:var(--carbon)}
.site-nav.solid .nav-links a{color:var(--graphite)}
.site-nav.solid .nav-links a:hover{color:var(--carbon);background:rgba(23,26,32,.05)}
.site-nav.solid .icon-link{color:var(--graphite)}
.site-nav.solid .icon-link:hover{color:var(--carbon);background:rgba(23,26,32,.06)}
.site-nav.solid .lang-toggle{color:var(--carbon);border-color:var(--pale)}
.site-nav.solid .lang-toggle:hover{border-color:var(--carbon);background:rgba(23,26,32,.04)}
.site-nav.solid .nav-burger span{background:var(--carbon)}

.mobile-menu{
  display:none;
  background:rgba(255,255,255,.96);
  -webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);
  border-bottom:1px solid var(--cloud);
  flex-direction:column;padding:8px 24px 20px;
}
.mobile-menu.open{display:flex}
.mobile-menu a{padding:13px 4px;font-size:16px;font-weight:500;color:var(--carbon);border-bottom:1px solid var(--cloud)}
.mobile-menu a:last-of-type{border-bottom:none}
.mobile-social{display:flex;gap:20px;margin-top:6px}
.mobile-social a{font-size:14px;color:var(--blue);border:none;padding:8px 0}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 32px;border-radius:var(--r-btn);
  font-size:14px;font-weight:500;letter-spacing:.01em;border:none;
  transition:background-color var(--t) var(--ease),color var(--t) var(--ease),border-color var(--t) var(--ease);
  white-space:nowrap;
}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:hover{background:var(--blue-dark)}
.btn-secondary-dark{background:rgba(255,255,255,.12);color:#fff;border:1px solid rgba(255,255,255,.28);min-height:42px;padding:0 26px}
.btn-secondary-dark:hover{background:rgba(255,255,255,.2)}
.btn-secondary-light{background:var(--white);color:var(--carbon);min-height:42px;padding:0 26px}
.btn-secondary-light:hover{background:var(--cloud)}
.btn-ghost{background:transparent;border:1px solid var(--pale);color:var(--carbon)}
.btn-ghost:hover{border-color:var(--carbon)}

/* ---------- CA chip ---------- */
.ca-chip{
  display:inline-flex;align-items:center;gap:8px;
  background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.22);
  border-radius:var(--r-btn);padding:8px 14px;color:#fff;
  font-size:13px;transition:border-color var(--t),background-color var(--t);position:relative;
}
.ca-chip:hover{border-color:rgba(255,255,255,.6);background:rgba(255,255,255,.13)}
.ca-chip code{font-size:13px;letter-spacing:.02em}
.ca-label{font-size:11px;font-weight:500;color:var(--pale);letter-spacing:.08em;padding-right:8px;border-right:1px solid rgba(255,255,255,.2)}
.ca-copied{display:none;position:absolute;left:50%;bottom:calc(100% + 10px);transform:translateX(-50%);
  background:var(--white);color:var(--carbon);font-size:12px;font-weight:500;
  padding:5px 10px;border-radius:var(--r-btn);white-space:nowrap;
  box-shadow:0 0 0 1px var(--cloud);}
.ca-chip.copied .ca-copy-icon{display:none}
.ca-chip.copied .ca-copied{display:block}
.ca-chip.copied{border-color:var(--blue)}
.ca-chip-inline{min-height:44px;padding:0 20px;gap:10px;font-size:13px}
.ca-chip-inline code{color:var(--carbon)}

/* ---------- Hero ---------- */
.hero{
  position:relative;min-height:100vh;min-height:100svh;
  background:var(--space);color:#fff;overflow:hidden;
  display:flex;flex-direction:column;
}
.hero .stars,.vault .stars{position:absolute;inset:0;z-index:0;pointer-events:none}
.star{position:absolute;background:#fff;border-radius:50%;opacity:0;animation:twinkle var(--tw,4s) ease-in-out infinite}
@keyframes twinkle{0%,100%{opacity:0}50%{opacity:.9}}
.nebula{position:absolute;border-radius:50%;filter:blur(90px);opacity:.5;z-index:0;pointer-events:none}
.nebula-a{width:60vw;height:60vw;left:-12vw;top:-18vw;background:radial-gradient(circle,rgba(62,106,225,.32),transparent 62%)}
.nebula-b{width:52vw;height:52vw;right:-10vw;bottom:-14vw;background:radial-gradient(circle,rgba(120,90,220,.20),transparent 60%)}
.hero-content{
  position:relative;z-index:2;flex:1;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  text-align:center;padding:110px 20px 40px;
}
.hero-mascot{
  width:min(240px,42vw);height:auto;border-radius:50%;
  box-shadow:0 0 90px rgba(62,106,225,.35),0 0 40px rgba(62,106,225,.18);
  animation:float 7s ease-in-out infinite;
}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-14px)}}
.hero-eyebrow{
  margin-top:26px;font-size:12px;font-weight:500;letter-spacing:.22em;color:var(--silver);
}
.hero-title{
  margin-top:14px;font-size:clamp(2.7rem,6.5vw,4rem);font-weight:500;color:#fff;
  letter-spacing:.01em;line-height:1.05;
}
.hero-sub{
  margin-top:16px;max-width:560px;font-size:17px;color:rgba(255,255,255,.82);font-weight:400;
}
.hero-cta{display:flex;gap:14px;margin-top:34px;flex-wrap:wrap;justify-content:center}
.hero .ca-chip{margin-top:26px}
.hero-explorer{margin-top:14px;font-size:13px;color:var(--silver);transition:color var(--t)}
.hero-explorer:hover{color:#fff}

.hero-stats{
  position:relative;z-index:2;
  display:grid;grid-template-columns:repeat(4,1fr);gap:1px;
  background:rgba(255,255,255,.06);
  border-top:1px solid rgba(255,255,255,.08);
}
.stat-cell{
  padding:22px 12px;text-align:center;display:flex;flex-direction:column;gap:4px;
  background:rgba(255,255,255,.015);
}
.stat-value{font-size:clamp(1.1rem,2.2vw,1.5rem);font-weight:500;color:#fff}
.stat-label{font-size:12px;color:var(--silver);letter-spacing:.04em;display:flex;align-items:center;justify-content:center;gap:6px}
.pulse-dot{width:7px;height:7px;border-radius:50%;background:var(--blue);display:inline-block;animation:pulse 2s ease-in-out infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.25}}
.scroll-hint{position:absolute;bottom:120px;left:50%;transform:translateX(-50%);z-index:3}
.scroll-hint span{display:block;width:1px;height:52px;background:linear-gradient(rgba(255,255,255,.6),transparent);}
.scroll-hint{display:none}

/* ---------- Sections ---------- */
.section{padding:110px 0;position:relative}
.section-white{background:var(--white)}
.section-ash{background:var(--ash)}
.section-dark{background:var(--space);color:#fff;overflow:hidden}
.section-carbon{background:var(--carbon);color:#fff}
.container{max-width:1180px;margin:0 auto;padding:0 24px;position:relative;z-index:1}
.container-narrow{max-width:820px}
.eyebrow{font-size:12.5px;font-weight:500;letter-spacing:.24em;color:var(--blue);text-transform:none}
.eyebrow-light{color:rgba(255,255,255,.55)}
.h2{font-size:clamp(1.9rem,4.4vw,2.8rem);font-weight:500;color:var(--carbon);line-height:1.15;margin-top:18px}
.h2-light{color:#fff}
.lead{font-size:17px;color:var(--graphite);max-width:720px;margin-top:20px}
.lead-light{color:rgba(255,255,255,.78)}

/* reveal on scroll */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ---------- About ---------- */
.about-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:64px;margin-top:44px;align-items:start}
.about-copy p{font-size:16.5px;color:var(--graphite);margin-bottom:20px}
.fact-list{margin:0}
.fact{display:flex;justify-content:space-between;align-items:baseline;gap:16px;
  padding:13px 0;border-bottom:1px solid var(--cloud)}
.fact:first-child{padding-top:0}
.fact dt{font-size:14px;color:var(--pewter)}
.fact dd{font-size:15px;font-weight:500;color:var(--carbon);text-align:right}
.fact dd small.snap{font-weight:400;color:var(--silver);font-size:12px}

/* ---------- Vault ---------- */
.vault{background:
  radial-gradient(600px 380px at 78% 8%,rgba(62,106,225,.14),transparent 60%),
  radial-gradient(500px 420px at 8% 90%,rgba(120,90,220,.10),transparent 60%),
  var(--space);}
.stars-faint .star{opacity:0;animation:none}
.vault-inner{display:flex;flex-direction:column;align-items:center;text-align:center}
.vault-inner .eyebrow,.vault-inner .lead{margin-left:auto;margin-right:auto}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:56px;width:100%}
.step{
  background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.09);
  border-radius:var(--r-card);padding:30px 26px;text-align:left;
  transition:border-color var(--t),background-color var(--t),transform var(--t);
}
.step:hover{border-color:rgba(255,255,255,.24);background:rgba(255,255,255,.06)}
.step-num{font-size:13px;font-weight:500;color:var(--blue);letter-spacing:.1em}
.step h3{font-size:18px;font-weight:500;color:#fff;margin:12px 0 8px}
.step p{font-size:14.5px;color:rgba(255,255,255,.68)}
.vault-snapshot{
  margin-top:64px;width:100%;display:flex;flex-wrap:wrap;align-items:center;gap:14px;
  justify-content:center;
  background:rgba(255,255,255,.045);border:1px solid rgba(255,255,255,.1);
  border-radius:var(--r-card);padding:26px 28px;
}
.snap-item{display:flex;flex-direction:column;gap:3px;text-align:left;padding:0 20px;border-right:1px solid rgba(255,255,255,.12)}
.snap-item:first-child{padding-left:0}
.snap-item:last-of-type{border-right:none}
.snap-label{font-size:11.5px;color:var(--silver);letter-spacing:.06em}
.snap-value{font-size:19px;font-weight:500;color:#fff}
.snap-note{flex-basis:100%;font-size:12px;color:var(--silver);text-align:center;margin-top:-6px}
.vault-badges{
  flex-basis:100%;display:flex;justify-content:center;align-items:center;gap:10px;
  font-size:11.5px;font-weight:500;letter-spacing:.14em;color:rgba(255,255,255,.6);
  margin:-2px 0 8px;text-transform:none;
}
.vault-badges::before,.vault-badges::after{content:'';width:16px;height:1px;background:rgba(255,255,255,.25);display:inline-block}
.vault-snapshot .btn{margin-top:2px}

/* ---------- How to Buy ---------- */
.buy-steps{list-style:none;margin-top:48px;display:grid;gap:0;counter-reset:buy}
.buy-step{display:flex;gap:22px;padding:26px 0;border-bottom:1px solid var(--cloud);align-items:flex-start}
.buy-step:last-child{border-bottom:none}
.buy-num{
  flex:0 0 42px;width:42px;height:42px;border-radius:50%;
  display:grid;place-items:center;font-size:16px;font-weight:500;color:#fff;background:var(--carbon);
}
.buy-step h3{font-size:18px;font-weight:500;color:var(--carbon)}
.buy-step p{font-size:15px;color:var(--graphite);margin-top:6px;max-width:640px}
.buy-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:36px;align-items:center}

/* ---------- Tokenomics ---------- */
.tok-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:52px}
.tok-card{
  background:rgba(255,255,255,.045);border:1px solid rgba(255,255,255,.1);
  border-radius:var(--r-card);padding:34px 22px;text-align:center;
  display:flex;flex-direction:column;gap:8px;
  transition:border-color var(--t),background-color var(--t);
}
.tok-card:hover{border-color:rgba(255,255,255,.26)}
.tok-value{font-size:clamp(1.15rem,2vw,1.5rem);font-weight:500;color:#fff;word-break:break-word}
.tok-live{color:var(--blue)}
.tok-label{font-size:12.5px;color:rgba(255,255,255,.62);letter-spacing:.03em}
.tok-note{margin:34px auto 0;max-width:680px;text-align:center;font-size:13.5px;color:rgba(255,255,255,.5)}
.tok-links{display:flex;gap:26px;justify-content:center;margin-top:22px}
.text-link{font-size:14px;color:rgba(255,255,255,.7);transition:color var(--t)}
.text-link:hover{color:#fff;text-decoration:underline}

/* ---------- FAQ ---------- */
.faq-list{margin-top:44px}
.faq-item{border-bottom:1px solid var(--cloud)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;justify-content:space-between;align-items:center;
  padding:24px 0;font-size:17px;font-weight:500;color:var(--carbon);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:'+';font-size:22px;font-weight:400;color:var(--pewter);
  transition:transform var(--t) var(--ease);
}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item p{padding:0 0 24px;font-size:15.5px;color:var(--graphite);max-width:760px}

/* ---------- Footer ---------- */
.footer{background:var(--space);color:#fff;padding:64px 0 36px}
.footer-top{display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap}
.footer-brand{display:flex;align-items:center;gap:12px}
.footer-word{font-size:15px;font-weight:500;letter-spacing:.3em;text-transform:lowercase}
.footer-links{display:flex;gap:26px}
.footer-links a{font-size:14px;color:rgba(255,255,255,.72);transition:color var(--t)}
.footer-links a:hover{color:#fff}
.footer-disclaimer{margin-top:34px;font-size:12.5px;line-height:1.75;color:rgba(255,255,255,.42);max-width:860px}
.footer-copy{margin-top:18px;font-size:13px;color:rgba(255,255,255,.5)}

/* ---------- Responsive ---------- */
@media (max-width:1024px){
  .tok-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:1fr;max-width:560px;margin-left:auto;margin-right:auto}
  .steps .step{text-align:center}
  .about-grid{grid-template-columns:1fr;gap:40px}
}
@media (max-width:820px){
  .nav-links{display:none}
  .nav-burger{display:flex}
  .hero-stats{grid-template-columns:repeat(2,1fr)}
  .stat-cell{padding:16px 10px}
  .vault-snapshot{flex-direction:column;align-items:flex-start;padding:22px}
  .snap-item{padding:8px 0;border-right:none;border-bottom:1px solid rgba(255,255,255,.08);width:100%}
  .snap-item:last-of-type{border-bottom:none}
  .snap-note{margin-top:4px}
  .footer-top{flex-direction:column;align-items:flex-start}
  .section{padding:84px 0}
  .about-copy p{font-size:15.5px}
}
@media (max-width:560px){
  .hero-cta .btn{width:100%;max-width:340px}
  .hero-sub{font-size:15.5px}
  .tok-grid{grid-template-columns:1fr}
  .buy-step{gap:16px}
  .buy-num{flex-basis:36px;width:36px;height:36px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001s!important;transition-duration:.001s!important;scroll-behavior:auto}
  .hero-mascot{animation:none}
}