/* ==========================================================================
   LightOn Plus Lab — shared design system
   Dark midnight navy · constellation bg · neon quad accents (mint/purple/pink/amber)
   ========================================================================== */

/* -------- 1. Design tokens -------- */
:root{
  /* Surfaces */
  --bg:#050814;
  --bg-deep:#030510;
  --panel:rgba(255,255,255,.03);
  --panel-hover:rgba(255,255,255,.05);
  --panel-border:rgba(255,255,255,.08);
  --panel-border-hover:rgba(255,255,255,.14);

  /* Text */
  --text:#E8ECF4;
  --text-2:#B8C0D4;
  --text-3:#8B95B3;
  --text-4:#5E687F;

  /* Accents (the four stitch neon colors) */
  --mint:#2DD4BF;
  --mint-glow:rgba(45,212,191,.22);
  --purple:#A78BFA;
  --purple-glow:rgba(167,139,250,.24);
  --pink:#F472B6;
  --pink-glow:rgba(244,114,182,.22);
  --amber:#F59E0B;
  --amber-glow:rgba(245,158,11,.22);
  --cyan:#22D3EE;
  --cyan-glow:rgba(34,211,238,.22);

  /* Typography */
  --f-sans:"Inter","Pretendard","Apple SD Gothic Neo","Noto Sans KR",ui-sans-serif,system-ui,sans-serif;
  --f-mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,monospace;

  /* Motion */
  --ease:cubic-bezier(.22,.61,.36,1);
  --ease-out:cubic-bezier(.16,1,.3,1);
  --shadow-lg:0 24px 80px rgba(0,0,0,.45);
  --shadow-glow:0 0 80px rgba(124,77,255,.10);
}

/* -------- 2. Reset & base -------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--f-sans);
  color:var(--text);
  background:var(--bg);
  line-height:1.55;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
  min-height:100vh;
  position:relative;
}
a{color:inherit;text-decoration:none}
img,svg,canvas{display:block;max-width:100%}
button{font:inherit;border:0;background:0;cursor:pointer;color:inherit}
input,textarea{font:inherit;color:inherit}
::selection{background:var(--purple);color:#fff}

/* -------- 3. Background constellation canvas (all pages) -------- */
#starfield{
  position:fixed;inset:0;
  width:100%;height:100%;
  z-index:0;
  pointer-events:none;
  opacity:.7;
}
.page-glow{
  position:fixed;inset:0;z-index:0;pointer-events:none;
  background:
    radial-gradient(900px 500px at 80% -5%, rgba(34,211,238,.06), transparent 60%),
    radial-gradient(800px 400px at 5% 30%, rgba(167,139,250,.05), transparent 60%),
    radial-gradient(900px 500px at 85% 70%, rgba(244,114,182,.04), transparent 65%);
}
main,header,footer{position:relative;z-index:1}

/* -------- 4. Layout -------- */
.wrap{width:100%;max-width:1240px;margin:0 auto;padding:0 32px}
@media(max-width:640px){.wrap{padding:0 20px}}

/* -------- 5. Typography -------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;
  background:rgba(45,212,191,.10);
  border:1px solid rgba(45,212,191,.28);
  color:var(--mint);
  font-size:11px;font-weight:600;letter-spacing:.2em;
  text-transform:uppercase;
}
.eyebrow::before{
  content:"";width:6px;height:6px;border-radius:50%;
  background:var(--mint);box-shadow:0 0 8px var(--mint);
}
.eyebrow.purple{background:rgba(167,139,250,.10);border-color:rgba(167,139,250,.28);color:var(--purple)}
.eyebrow.purple::before{background:var(--purple);box-shadow:0 0 8px var(--purple)}
.eyebrow.pink{background:rgba(244,114,182,.10);border-color:rgba(244,114,182,.28);color:var(--pink)}
.eyebrow.pink::before{background:var(--pink);box-shadow:0 0 8px var(--pink)}

h1,h2,h3,h4{color:var(--text);letter-spacing:0;line-height:1.12;font-weight:700}
.display{
  font-size:clamp(44px,6.4vw,84px);
  font-weight:700;letter-spacing:0;line-height:1.03;
}
.display .accent{color:var(--mint)}
.display em{font-style:normal;background:linear-gradient(135deg,var(--cyan),var(--mint));-webkit-background-clip:text;background-clip:text;color:transparent}

.h2{font-size:clamp(30px,3.6vw,48px);font-weight:700;letter-spacing:0;line-height:1.1}
.h3{font-size:clamp(20px,1.8vw,24px);font-weight:600;letter-spacing:0}

.lead{font-size:clamp(16px,1.15vw,18px);line-height:1.65;color:var(--text-3);max-width:56ch}
.small{font-size:13px;color:var(--text-3);line-height:1.6}
.mono{font-family:var(--f-mono);font-size:12px;letter-spacing:.02em;color:var(--text-3)}

/* -------- 6. Navigation -------- */
.nav{
  position:sticky;top:0;z-index:50;
  background:rgba(5,8,20,.72);
  backdrop-filter:saturate(1.4) blur(20px);
  -webkit-backdrop-filter:saturate(1.4) blur(20px);
  border-bottom:1px solid var(--panel-border);
}
.nav-inner{
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 0;gap:24px;
}
.brand{display:flex;align-items:center;gap:12px}
.brand-img{
  width:36px;height:36px;border-radius:10px;
  background:#fff;padding:5px;
  object-fit:contain;
  box-shadow:0 0 0 1px var(--panel-border),0 6px 20px rgba(45,212,191,.15);
  transition:box-shadow .2s var(--ease);
}
.brand:hover .brand-img{box-shadow:0 0 0 1px var(--panel-border-hover),0 8px 24px rgba(45,212,191,.3)}
.brand-text{display:flex;flex-direction:column;gap:2px;line-height:1}
.brand-name{
  font-weight:700;font-size:14.5px;letter-spacing:0;color:var(--text);
}
.brand-name .plus{color:var(--mint);font-weight:800;margin:0 1px}
.brand-sub{
  font-family:var(--f-mono);font-size:9.5px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--text-4);font-weight:500;
}

.nav-links{display:flex;align-items:center;gap:2px}
.nav-links a{
  padding:8px 14px;border-radius:8px;
  font-size:13px;font-weight:500;color:var(--text-3);
  transition:color .2s var(--ease),background .2s var(--ease);
}
.nav-links a:hover,.nav-links a.active{color:var(--text);background:rgba(255,255,255,.04)}
.nav-links a.active{
  position:relative;color:var(--mint);
}
.nav-links a.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;
  height:2px;background:var(--mint);border-radius:2px;
  box-shadow:0 0 8px var(--mint);
}

.nav-cta{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 18px;border-radius:999px;
  font-size:13px;font-weight:600;
  background:linear-gradient(135deg,var(--purple),#7C5CFF);
  color:#fff;
  box-shadow:0 0 0 1px rgba(167,139,250,.3),0 8px 24px rgba(167,139,250,.25);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease);
}
.nav-cta:hover{transform:translateY(-1px);box-shadow:0 0 0 1px rgba(167,139,250,.5),0 12px 32px rgba(167,139,250,.4)}
.nav-cta .arrow{width:13px;height:13px;stroke-width:2}

.hamburger{
  display:none;width:38px;height:38px;border-radius:10px;
  align-items:center;justify-content:center;
  background:transparent;border:1px solid var(--panel-border);
}
.hamburger:hover{background:rgba(255,255,255,.04)}
.hamburger svg{width:18px;height:18px;stroke:var(--text);stroke-width:2}

.mobile-menu{
  position:fixed;top:64px;left:0;right:0;z-index:49;
  background:rgba(5,8,20,.96);
  backdrop-filter:blur(24px);
  border-bottom:1px solid var(--panel-border);
  display:none;flex-direction:column;padding:12px 20px 24px;
}
.mobile-menu.open{display:flex;animation:slideDown .3s var(--ease-out)}
.mobile-menu a{
  padding:14px 12px;font-size:16px;font-weight:500;
  border-bottom:1px solid var(--panel-border);
  color:var(--text);border-radius:8px;
}
.mobile-menu a:last-of-type{border-bottom:0}
@keyframes slideDown{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}

/* -------- 7. Buttons -------- */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:13px 22px;border-radius:12px;
  font-size:14px;font-weight:600;letter-spacing:0;
  transition:transform .2s var(--ease),background .2s var(--ease),box-shadow .2s var(--ease);
  white-space:nowrap;
}
.btn .arrow{width:14px;height:14px;stroke-width:2;transition:transform .2s var(--ease)}
.btn:hover .arrow{transform:translateX(3px)}
.btn-primary{
  background:linear-gradient(135deg,var(--purple) 0%,#7C5CFF 100%);
  color:#fff;
  box-shadow:0 0 0 1px rgba(167,139,250,.3),0 12px 32px rgba(167,139,250,.22);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(167,139,250,.5),0 16px 40px rgba(167,139,250,.35)}
.btn-ghost{
  border:1px solid var(--panel-border);background:var(--panel);color:var(--text);
}
.btn-ghost:hover{background:var(--panel-hover);border-color:var(--panel-border-hover);transform:translateY(-1px)}

/* -------- 8. Panels / Glass cards -------- */
.panel{
  position:relative;
  background:var(--panel);
  border:1px solid var(--panel-border);
  border-radius:16px;
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  transition:background .25s var(--ease),border-color .25s var(--ease),transform .25s var(--ease);
}
.panel:hover{background:var(--panel-hover);border-color:var(--panel-border-hover)}

/* -------- 9. Section scaffolding -------- */
section{padding:88px 0;position:relative}
.section-label{text-align:center;margin-bottom:16px}
.section-title{
  text-align:center;margin:0 auto 16px;
  font-size:clamp(28px,3.4vw,44px);
  font-weight:700;letter-spacing:0;line-height:1.12;
}
.section-desc{
  text-align:center;color:var(--text-3);
  font-size:15.5px;line-height:1.65;
  max-width:62ch;margin:0 auto 56px;
}

/* -------- 10. Icon badges (accent-colored) -------- */
.ibadge{
  width:44px;height:44px;border-radius:12px;
  display:grid;place-items:center;
  margin-bottom:16px;
  position:relative;
  transition:transform .3s var(--ease),box-shadow .3s var(--ease);
}
.ibadge svg{width:20px;height:20px;stroke-width:2}
.ibadge.mint{background:rgba(45,212,191,.12);border:1px solid rgba(45,212,191,.3);color:var(--mint);box-shadow:inset 0 1px 0 rgba(45,212,191,.15)}
.ibadge.purple{background:rgba(167,139,250,.12);border:1px solid rgba(167,139,250,.3);color:var(--purple);box-shadow:inset 0 1px 0 rgba(167,139,250,.15)}
.ibadge.pink{background:rgba(244,114,182,.12);border:1px solid rgba(244,114,182,.3);color:var(--pink);box-shadow:inset 0 1px 0 rgba(244,114,182,.15)}
.ibadge.amber{background:rgba(245,158,11,.12);border:1px solid rgba(245,158,11,.3);color:var(--amber);box-shadow:inset 0 1px 0 rgba(245,158,11,.15)}
.ibadge.cyan{background:rgba(34,211,238,.12);border:1px solid rgba(34,211,238,.3);color:var(--cyan);box-shadow:inset 0 1px 0 rgba(34,211,238,.15)}
.panel:hover .ibadge{transform:scale(1.05)}
.panel:hover .ibadge.mint{box-shadow:0 0 24px var(--mint-glow)}
.panel:hover .ibadge.purple{box-shadow:0 0 24px var(--purple-glow)}
.panel:hover .ibadge.pink{box-shadow:0 0 24px var(--pink-glow)}
.panel:hover .ibadge.amber{box-shadow:0 0 24px var(--amber-glow)}
.panel:hover .ibadge.cyan{box-shadow:0 0 24px var(--cyan-glow)}

/* -------- 11. Tag chips -------- */
.chip{
  display:inline-flex;align-items:center;
  padding:5px 10px;border-radius:6px;
  font-family:var(--f-mono);font-size:11px;font-weight:500;
  letter-spacing:.02em;
  background:rgba(255,255,255,.04);
  border:1px solid var(--panel-border);
  color:var(--text-2);
}
.chip-row{display:flex;gap:6px;flex-wrap:wrap}

/* -------- 12. CTA block (bottom of most pages) -------- */
.cta-block{
  margin-top:48px;
  padding:48px;
  background:linear-gradient(135deg,rgba(167,139,250,.08),rgba(45,212,191,.06));
  border:1px solid var(--panel-border);
  border-radius:20px;
  text-align:center;
  position:relative;overflow:hidden;
}
.cta-block::before{
  content:"";position:absolute;inset:-1px;
  background:radial-gradient(600px 200px at 50% 0%,rgba(167,139,250,.18),transparent 60%);
  pointer-events:none;
}
.cta-block h2{position:relative;font-size:clamp(24px,2.6vw,36px);margin-bottom:12px}
.cta-block p{position:relative;color:var(--text-3);margin-bottom:28px;max-width:52ch;margin-left:auto;margin-right:auto}
.cta-block .btn{position:relative}

/* -------- 13. Footer -------- */
.footer{
  margin-top:72px;padding:56px 0 32px;
  border-top:1px solid var(--panel-border);
  background:var(--bg-deep);
  font-size:13px;color:var(--text-3);
}
.footer-top{
  display:grid;grid-template-columns:1.4fr repeat(3,1fr);
  gap:48px;margin-bottom:48px;
}
.footer-brand{margin-bottom:14px}
.footer-brand .brand{pointer-events:none}
.footer-tagline{color:var(--text-4);line-height:1.65;font-size:13px;max-width:36ch}
.footer-col h5{
  font-family:var(--f-mono);font-size:10px;font-weight:600;
  letter-spacing:.16em;text-transform:uppercase;
  color:var(--text-4);margin-bottom:14px;
}
.footer-col a{
  display:block;padding:4px 0;color:var(--text-2);
  font-size:13.5px;transition:color .2s var(--ease);
}
.footer-col a:hover{color:var(--mint)}
.footer-legal{
  padding-top:24px;border-top:1px solid var(--panel-border);
  display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;
  color:var(--text-4);font-size:11.5px;line-height:1.8;
}
.footer-legal a{color:var(--text-3);transition:color .2s}
.footer-legal a:hover{color:var(--text)}
.footer-biz{font-size:11px;color:var(--text-4);line-height:1.85;margin-top:16px;max-width:700px}

/* -------- 14. Reveal animations -------- */
.reveal{opacity:0;transform:translateY(20px);transition:opacity .7s var(--ease-out),transform .7s var(--ease-out)}
.reveal.in{opacity:1;transform:translateY(0)}
.reveal-d1{transition-delay:.08s}
.reveal-d2{transition-delay:.16s}
.reveal-d3{transition-delay:.24s}
.reveal-d4{transition-delay:.32s}

@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
  .reveal{opacity:1;transform:none}
}

/* -------- 15. Responsive -------- */
@media(max-width:960px){
  .nav-links,.nav-cta{display:none}
  .hamburger{display:inline-flex}
  .footer-top{grid-template-columns:1fr 1fr;gap:32px}
  section{padding:64px 0}
  .cta-block{padding:32px 24px}
}
@media(max-width:640px){
  .footer-top{grid-template-columns:1fr}
  .footer-legal{flex-direction:column;align-items:flex-start}
}