/* ===== Cubewave — design tokens ===== */
:root{
  --c-bg:#ffffff;
  --c-bg-soft:#f6f8fc;
  --c-bg-alt:#0b1226;
  --c-text:#0f172a;
  --c-text-soft:#475569;
  --c-muted:#64748b;
  --c-border:#e6eaf2;
  --c-border-soft:#eef1f7;

  --c-primary:#1e40af;
  --c-primary-d:#1e3a8a;
  --c-primary-l:#3b82f6;
  --c-accent:#60a5fa;
  --c-blue-50:#eff4ff;

  --grad-blue:linear-gradient(135deg,#1e3a8a 0%,#2563eb 55%,#3b82f6 100%);
  --grad-soft:linear-gradient(135deg,#eaf1ff 0%,#dbe8ff 100%);

  --shadow-sm:0 1px 2px rgba(15,23,42,.06);
  --shadow-md:0 8px 24px rgba(30,58,138,.08);
  --shadow-lg:0 24px 56px rgba(30,58,138,.14);
  --shadow-blue:0 18px 40px rgba(30,64,175,.28);

  --r-sm:8px; --r-md:14px; --r-lg:20px; --r-xl:28px;

  --container:1180px;
  --pad-x:clamp(20px,4vw,40px);

  --t-fast:.18s ease;
  --t-base:.32s cubic-bezier(.2,.7,.2,1);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"Pretendard Variable","Pretendard",system-ui,-apple-system,Segoe UI,Roboto,"Apple SD Gothic Neo","Noto Sans KR",sans-serif;
  font-feature-settings:"ss06","cv11";
  color:var(--c-text);
  background:var(--c-bg);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img,svg{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,h5{margin:0;letter-spacing:-.02em;font-weight:700;color:var(--c-text)}
p{margin:0;color:var(--c-text-soft)}
.container{width:min(var(--container),100% - var(--pad-x)*2);margin-inline:auto;padding-inline:var(--pad-x)}
.skip{position:absolute;left:-9999px;top:0}
.skip:focus{left:8px;top:8px;background:#fff;color:var(--c-primary);padding:8px 12px;border-radius:8px;z-index:1000;box-shadow:var(--shadow-md)}

/* ===== Header ===== */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.78);
  backdrop-filter:saturate(140%) blur(14px);
  -webkit-backdrop-filter:saturate(140%) blur(14px);
  border-bottom:1px solid transparent;
  transition:border-color var(--t-base),box-shadow var(--t-base),background var(--t-base);
}
.site-header.scrolled{border-bottom-color:var(--c-border-soft);box-shadow:0 6px 20px rgba(15,23,42,.04)}
.nav{display:flex;align-items:center;gap:24px;height:72px}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:800;letter-spacing:.06em}
.brand-mark{display:inline-grid;place-items:center}
.brand-text{font-size:18px;background:var(--grad-blue);-webkit-background-clip:text;background-clip:text;color:transparent}
.nav-menu{display:flex;gap:28px;margin-left:24px;flex:1}
.nav-menu a{color:var(--c-text-soft);font-weight:600;font-size:15px;position:relative;padding:6px 0;transition:color var(--t-fast)}
.nav-menu a:hover{color:var(--c-primary)}
.nav-menu a::after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;background:var(--grad-blue);border-radius:2px;transform:scaleX(0);transform-origin:left;transition:transform var(--t-base)}
.nav-menu a:hover::after{transform:scaleX(1)}
.nav-cta{display:flex;align-items:center;gap:8px}
.nav-toggle{display:none;width:40px;height:40px;border-radius:10px;border:1px solid var(--c-border);align-items:center;justify-content:center;flex-direction:column;gap:4px}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--c-text);border-radius:2px;transition:transform var(--t-base),opacity var(--t-fast)}
.nav-toggle[aria-expanded=true] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded=true] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded=true] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* ===== Buttons ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:999px;
  font-weight:700;font-size:15px;letter-spacing:-.005em;
  transition:transform var(--t-fast),box-shadow var(--t-base),background var(--t-base),color var(--t-base);
  white-space:nowrap;
}
.btn-sm{height:40px;padding:0 16px;font-size:14px}
.btn-block{width:100%}
.btn-primary{background:var(--grad-blue);color:#fff;box-shadow:var(--shadow-blue)}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 22px 50px rgba(30,64,175,.32)}
.btn-ghost{background:transparent;color:var(--c-primary);border:1px solid var(--c-border)}
.btn-ghost:hover{border-color:var(--c-primary);background:var(--c-blue-50)}

/* ===== Hero ===== */
.hero{position:relative;overflow:hidden;padding:80px 0 24px}
.hero-bg{position:absolute;inset:0;pointer-events:none;z-index:0}
.hero-grid{
  position:absolute;inset:-1px;
  background-image:
    linear-gradient(to right, rgba(30,58,138,.06) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(30,58,138,.06) 1px, transparent 1px);
  background-size:48px 48px;
  mask-image:radial-gradient(ellipse 80% 60% at 50% 30%, #000 30%, transparent 75%);
  -webkit-mask-image:radial-gradient(ellipse 80% 60% at 50% 30%, #000 30%, transparent 75%);
}
.hero-glow{
  position:absolute;left:50%;top:-220px;transform:translateX(-50%);
  width:1200px;height:600px;border-radius:50%;
  background:radial-gradient(closest-side, rgba(59,130,246,.22), transparent 70%);
  filter:blur(40px);
}
.hero-inner{
  position:relative;z-index:1;
  display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center;
  padding:32px 0 56px;
}
.eyebrow{
  display:inline-block;font-size:12px;font-weight:700;letter-spacing:.18em;
  color:var(--c-primary);background:var(--c-blue-50);padding:8px 12px;border-radius:999px;
  margin-bottom:18px;
}
.display{
  font-size:clamp(36px,5.4vw,64px);
  line-height:1.1;letter-spacing:-.03em;
  margin:0 0 20px;
}
.grad{background:var(--grad-blue);-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{font-size:clamp(15px,1.4vw,18px);max-width:560px;margin-bottom:28px}
.lead b{color:var(--c-text);font-weight:700}
.hero-actions{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:28px}
.hero-meta{display:flex;flex-wrap:wrap;gap:18px 28px;color:var(--c-text-soft);font-size:14px}
.hero-meta li{position:relative;padding-left:18px}
.hero-meta li::before{content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);width:6px;height:6px;border-radius:50%;background:var(--c-primary-l)}
.hero-meta strong{color:var(--c-text);font-weight:700;margin-right:4px}

/* Cube visual */
.hero-visual{position:relative;display:grid;place-items:center;min-height:340px}
.cube-stage{position:relative;width:min(420px,100%);aspect-ratio:1;display:grid;place-items:center;
  filter:drop-shadow(0 30px 60px rgba(30,58,138,.25));
  animation:floaty 6s ease-in-out infinite;
}
.cube-art{transform:rotate(-2deg)}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}
.orb{position:absolute;border-radius:50%;background:var(--grad-blue);opacity:.6;filter:blur(2px)}
.orb-1{width:14px;height:14px;left:8%;top:18%;animation:orb 5s ease-in-out infinite}
.orb-2{width:10px;height:10px;right:12%;top:30%;animation:orb 6.5s ease-in-out infinite reverse}
.orb-3{width:18px;height:18px;left:20%;bottom:14%;animation:orb 7s ease-in-out infinite}
@keyframes orb{0%,100%{transform:translate(0,0)}50%{transform:translate(8px,-12px)}}

/* Strip */
.hero-strip{position:relative;z-index:1;border-top:1px dashed var(--c-border)}
.strip-inner{display:flex;align-items:center;gap:18px;padding:20px 0;flex-wrap:wrap}
.strip-label{font-size:12px;letter-spacing:.18em;color:var(--c-muted);font-weight:700}
.strip-items{display:flex;gap:14px;flex-wrap:wrap;color:var(--c-text-soft);font-weight:600;font-size:14px;letter-spacing:.04em}

/* ===== Sections ===== */
.section{padding:96px 0}
.section-alt{background:var(--c-bg-soft);border-block:1px solid var(--c-border-soft)}
.section-head{text-align:center;max-width:780px;margin:0 auto 48px}
.section-head h2{font-size:clamp(28px,3.4vw,42px);line-height:1.2;letter-spacing:-.025em;margin:8px 0 14px}
.section-head p{font-size:16px;color:var(--c-text-soft)}

/* Stats */
.section-stats{padding:40px 0}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.stat{
  background:#fff;border:1px solid var(--c-border-soft);border-radius:var(--r-lg);
  padding:24px;text-align:center;box-shadow:var(--shadow-sm);
  transition:transform var(--t-base),box-shadow var(--t-base),border-color var(--t-base);
}
.stat:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:#dbe5fa}
.stat .num{font-size:clamp(28px,3vw,40px);font-weight:800;color:var(--c-primary-d);letter-spacing:-.02em}
.stat .suffix{font-size:clamp(20px,2.4vw,28px);font-weight:800;color:var(--c-primary-l);margin-left:2px}
.stat p{margin-top:6px;font-size:13px;color:var(--c-muted);font-weight:600}

/* Cards */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.card{
  position:relative;background:#fff;border:1px solid var(--c-border);border-radius:var(--r-xl);
  padding:32px;transition:transform var(--t-base),box-shadow var(--t-base),border-color var(--t-base);
  overflow:hidden;
}
.card::before{
  content:"";position:absolute;inset:0;border-radius:inherit;
  background:linear-gradient(180deg,rgba(59,130,246,.04),transparent 40%);
  pointer-events:none;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:#cfd9f3}
.card-icon{
  width:52px;height:52px;border-radius:14px;
  display:grid;place-items:center;color:#fff;
  background:var(--grad-blue);box-shadow:var(--shadow-blue);
  margin-bottom:18px;
}
.card-accent{background:linear-gradient(180deg,#f4f8ff 0%,#fff 60%);border-color:#dbe5fa}
.card h3{font-size:22px;margin-bottom:4px}
.card-sub{font-size:13px;color:var(--c-primary);font-weight:700;letter-spacing:.04em;margin-bottom:14px}
.bullets{margin-top:18px;display:grid;gap:8px}
.bullets li{position:relative;padding-left:22px;color:var(--c-text-soft);font-size:14.5px}
.bullets li::before{
  content:"";position:absolute;left:0;top:9px;width:14px;height:8px;
  border-left:2px solid var(--c-primary-l);border-bottom:2px solid var(--c-primary-l);
  transform:rotate(-45deg);
}

/* Steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:step}
.step{
  position:relative;background:#fff;border:1px solid var(--c-border);border-radius:var(--r-xl);
  padding:28px;transition:transform var(--t-base),box-shadow var(--t-base);
}
.step:hover{transform:translateY(-3px);box-shadow:var(--shadow-md)}
.step-no{
  display:inline-block;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
  font-size:14px;font-weight:800;letter-spacing:.04em;
  color:var(--c-primary);background:var(--c-blue-50);
  padding:4px 10px;border-radius:999px;margin-bottom:14px;
}
.step h3{font-size:18px;margin-bottom:6px}
.step p{font-size:14.5px}

/* Why grid */
.why-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.why-text h2{font-size:clamp(28px,3.2vw,40px);line-height:1.2;letter-spacing:-.025em;margin:8px 0 16px}
.why-text p{font-size:16px;margin-bottom:24px}
.why-list{display:grid;gap:14px}
.why-list li{
  background:#fff;border:1px solid var(--c-border);border-radius:var(--r-md);
  padding:20px 22px;transition:transform var(--t-base),box-shadow var(--t-base),border-color var(--t-base);
}
.why-list li:hover{transform:translateX(4px);border-color:#cfd9f3;box-shadow:var(--shadow-sm)}
.why-list h4{font-size:16px;margin-bottom:6px;color:var(--c-primary-d)}
.why-list p{font-size:14.5px}

/* About */
.about{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.about h2{font-size:clamp(26px,3vw,38px);line-height:1.25;margin:8px 0 16px}
.about p{font-size:16px;margin-bottom:24px}
.about-meta{display:grid;gap:12px;margin:0}
.about-meta>div{display:grid;grid-template-columns:120px 1fr;gap:12px;padding:12px 0;border-top:1px solid var(--c-border)}
.about-meta>div:last-child{border-bottom:1px solid var(--c-border)}
.about-meta dt{font-size:13px;color:var(--c-muted);font-weight:700;letter-spacing:.04em}
.about-meta dd{margin:0;color:var(--c-text);font-weight:600}
.quote{
  background:var(--grad-blue);color:#fff;border-radius:var(--r-xl);padding:36px 32px;
  position:relative;overflow:hidden;box-shadow:var(--shadow-lg);
}
.quote::before{
  content:"";position:absolute;inset:-40% -10% auto auto;width:280px;height:280px;border-radius:50%;
  background:radial-gradient(closest-side, rgba(255,255,255,.18), transparent 70%);
}
.quote p{color:#fff;font-size:18px;line-height:1.6;font-weight:500}
.quote p em{font-style:normal;background:linear-gradient(180deg,transparent 60%,rgba(255,255,255,.25) 60%);padding:0 4px}
.quote-by{display:block;margin-top:18px;font-size:14px;color:rgba(255,255,255,.78);letter-spacing:.02em}

/* CTA */
.section-cta{padding:80px 0}
.cta{
  background:var(--c-bg-alt);
  background-image:
    radial-gradient(ellipse 60% 40% at 0% 0%, rgba(59,130,246,.35), transparent 70%),
    radial-gradient(ellipse 50% 40% at 100% 100%, rgba(96,165,250,.25), transparent 70%);
  border-radius:var(--r-xl);
  padding:clamp(36px,5vw,64px);
  display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center;
  color:#fff;box-shadow:var(--shadow-lg);overflow:hidden;
}
.cta-text .eyebrow{background:rgba(255,255,255,.12);color:#cdd9ff}
.cta-text h2{color:#fff;font-size:clamp(28px,3.2vw,42px);line-height:1.2;margin:8px 0 14px}
.cta-text p{color:rgba(255,255,255,.78);font-size:16px}
.cta-card{
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);
  border-radius:var(--r-lg);padding:24px;backdrop-filter:blur(8px);
}
.contact-list{display:grid;gap:14px;margin-bottom:18px}
.contact-list li{display:grid;grid-template-columns:40px 1fr;align-items:center;gap:12px}
.contact-list .ci{
  width:40px;height:40px;border-radius:10px;
  display:grid;place-items:center;color:#cdd9ff;
  background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12);
}
.contact-list span{display:block;font-size:12px;color:rgba(255,255,255,.6);letter-spacing:.06em}
.contact-list a{color:#fff;font-weight:700;font-size:16px}
.cta-card .btn{margin-top:8px}
.cta-card .btn-ghost{color:#fff;border-color:rgba(255,255,255,.25);background:transparent}
.cta-card .btn-ghost:hover{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.45)}

/* Footer */
.site-footer{padding:56px 0 24px;background:#fff;border-top:1px solid var(--c-border-soft)}
.foot{display:grid;grid-template-columns:1.2fr 2fr;gap:40px;align-items:start}
.foot-brand p{margin-top:10px;color:var(--c-muted);font-size:14px;max-width:340px}
.foot-cols{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.foot-cols h5{font-size:13px;color:var(--c-text);letter-spacing:.04em;margin-bottom:12px}
.foot-cols a{display:block;font-size:14px;color:var(--c-text-soft);padding:4px 0;transition:color var(--t-fast)}
.foot-cols a:hover{color:var(--c-primary)}
.foot-bottom{margin-top:32px;padding-top:20px;border-top:1px solid var(--c-border-soft);display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;color:var(--c-muted);font-size:12.5px}

/* Reveal animations */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .7s ease,transform .7s cubic-bezier(.2,.7,.2,1)}
.reveal.is-in{opacity:1;transform:none}

/* ===== Responsive ===== */
@media (max-width:980px){
  .hero{padding-top:48px}
  .hero-inner{grid-template-columns:1fr;gap:24px;padding:24px 0 36px;text-align:center}
  .hero-text .eyebrow{margin-inline:auto}
  .hero-text .lead{margin-inline:auto}
  .hero-actions{justify-content:center}
  .hero-meta{justify-content:center}
  .hero-visual{order:-1;min-height:260px}
  .stats{grid-template-columns:repeat(2,1fr)}
  .cards{grid-template-columns:1fr}
  .steps{grid-template-columns:repeat(2,1fr)}
  .why-grid{grid-template-columns:1fr;gap:32px}
  .about{grid-template-columns:1fr;gap:28px}
  .cta{grid-template-columns:1fr;text-align:center}
  .cta-text .eyebrow{margin-inline:auto}
  .foot{grid-template-columns:1fr;gap:28px}
  .foot-cols{grid-template-columns:repeat(3,1fr)}
}

@media (max-width:720px){
  .nav-menu{
    position:absolute;left:0;right:0;top:72px;
    flex-direction:column;gap:0;
    background:#fff;border-bottom:1px solid var(--c-border-soft);
    padding:8px 16px 16px;margin:0;flex:initial;
    transform:translateY(-8px);opacity:0;pointer-events:none;
    transition:opacity var(--t-base),transform var(--t-base);
  }
  .nav-menu.open{opacity:1;transform:none;pointer-events:auto}
  .nav-menu a{padding:14px 4px;border-bottom:1px solid var(--c-border-soft)}
  .nav-menu a:last-child{border-bottom:0}
  .nav-toggle{display:flex}
  .nav-cta .btn-sm{display:none}
  .section{padding:64px 0}
  .stats{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:1fr}
  .foot-cols{grid-template-columns:1fr 1fr}
  .about-meta>div{grid-template-columns:90px 1fr}
}

@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}