*,*:before,*:after{box-sizing:border-box}
html,body{margin:0;padding:0;background:#0A1929;color:#e8e8ec;font-family:'Pretendard','Malgun Gothic','Apple SD Gothic Neo',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;-webkit-font-smoothing:antialiased;line-height:1.6}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button{font-family:inherit;cursor:pointer;border:0;background:0}

/* ─── topbar ─── */
.topbar{position:sticky;top:0;z-index:100;background:rgba(13,13,13,.92);backdrop-filter:blur(12px);border-bottom:1px solid rgba(255,255,255,.06)}
.topbar-inner{max-width:1200px;margin:0 auto;padding:14px 24px;display:flex;align-items:center;gap:24px}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.brand-dot{width:10px;height:10px;background:#4FC3F7;border-radius:50%;box-shadow:0 0 12px #4FC3F7}
.brand-name{font-size:22px;font-weight:900;letter-spacing:.5px;color:#4FC3F7}
.mainnav{display:flex;gap:4px;flex:1;justify-content:center}
.nav-link{padding:8px 16px;font-size:15px;font-weight:600;color:#c8c8cf;border-radius:8px;transition:all .15s}
.nav-link:hover{color:#4FC3F7;background:rgba(79,195,247,.24)}
.nav-link.active{color:#4FC3F7;background:rgba(79,195,247,.24)}
.topcta{display:flex;gap:10px;flex-shrink:0}

/* ─── buttons ─── */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:10px 22px;font-size:14px;font-weight:700;border-radius:10px;transition:transform .15s,box-shadow .15s;cursor:pointer;text-decoration:none;white-space:nowrap}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:linear-gradient(135deg,#4FC3F7,#4FC3F7);color:#0A1929;box-shadow:0 4px 20px rgba(0,0,0,.3)}
.btn-primary:hover{box-shadow:0 6px 24px rgba(79,195,247,.24),0 0 0 3px rgba(79,195,247,.24)}
.btn-outline{background:transparent;color:#e8e8ec;border:1px solid rgba(255,255,255,.15)}
.btn-outline:hover{border-color:#4FC3F7;color:#4FC3F7}
.btn-ghost{background:rgba(255,255,255,.05);color:#e8e8ec;border:1px solid rgba(255,255,255,.1)}
.btn-lg{padding:14px 32px;font-size:16px}
.btn-xl{padding:16px 40px;font-size:17px}

/* ─── mobile menu btn (default hidden) ─── */
.mobmenu-btn{display:none;position:fixed;top:14px;right:16px;width:40px;height:40px;background:rgba(0,0,0,.6);border-radius:8px;flex-direction:column;justify-content:center;align-items:center;gap:5px;z-index:200}
.mobmenu-btn span{display:block;width:20px;height:2px;background:#4FC3F7;border-radius:2px}

/* ─── layout ─── */
.page{min-height:calc(100vh - 200px)}
.section{padding:60px 0}
.section-inner{max-width:1200px;margin:0 auto;padding:0 24px}
.tag{display:inline-block;padding:6px 14px;background:rgba(79,195,247,.24);color:#4FC3F7;border-radius:20px;font-size:13px;font-weight:700;letter-spacing:.5px;margin-bottom:16px}

/* ─── hero ─── */
.hero{position:relative;padding:100px 24px 80px;text-align:center;overflow:hidden}
.hero-inner{max-width:900px;margin:0 auto;position:relative;z-index:2}
.hero-title{font-size:56px;font-weight:900;line-height:1.15;margin:12px 0 20px;letter-spacing:-1px}
.hero-accent{color:#4FC3F7;display:inline-block;background:linear-gradient(135deg,#4FC3F7,#4FC3F7);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-desc{font-size:18px;color:#b8b8c0;margin:0 auto 36px;max-width:640px;line-height:1.7}
.hero-cta{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.hero-orb{position:absolute;border-radius:50%;filter:blur(80px);opacity:.5;pointer-events:none}
.orb-a{top:-100px;left:-100px;width:400px;height:400px;background:#4FC3F7}
.orb-b{bottom:-150px;right:-100px;width:500px;height:500px;background:rgba(79,195,247,.24)}

/* ─── page-hero (하위 페이지) ─── */
.page-hero{padding:80px 24px 50px;text-align:center;background:linear-gradient(180deg,rgba(255,255,255,.02),transparent)}
.page-hero h1{font-size:40px;font-weight:900;margin:12px 0 12px;color:#fff}
.page-hero p{color:#b8b8c0;font-size:17px;margin:0}

/* ─── features grid (홈) ─── */
.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px}
.feature-card{background:linear-gradient(180deg,rgba(255,255,255,.03),rgba(255,255,255,.01));border:1px solid rgba(255,255,255,.06);border-radius:16px;padding:28px;transition:all .2s}
.feature-card:hover{border-color:#4FC3F7;transform:translateY(-4px);box-shadow:0 12px 30px rgba(0,0,0,.4),0 0 0 1px rgba(79,195,247,.24)}
.feature-ico{font-size:40px;margin-bottom:14px}
.feature-card h3{font-size:18px;font-weight:800;margin:0 0 10px;color:#fff}
.feature-card p{font-size:14px;color:#a8a8b0;margin:0;line-height:1.7}

/* ─── cta band ─── */
.cta-band{padding:80px 24px;background:linear-gradient(135deg,rgba(79,195,247,.24),transparent);text-align:center;border-top:1px solid rgba(255,255,255,.05);border-bottom:1px solid rgba(255,255,255,.05)}
.cta-band-inner h2{font-size:32px;font-weight:900;margin:0 0 14px;color:#fff}
.cta-band-inner p{color:#b8b8c0;margin:0 0 28px;font-size:16px}

/* ─── events grid ─── */
.event-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:22px}
.event-card{position:relative;background:linear-gradient(180deg,rgba(255,255,255,.04),rgba(255,255,255,.01));border:1px solid rgba(255,255,255,.08);border-radius:16px;padding:28px;transition:all .2s}
.event-card:hover{border-color:#4FC3F7;transform:translateY(-3px)}
.event-card h3{font-size:19px;font-weight:800;margin:14px 0 12px;color:#fff}
.event-card p{color:#b8b8c0;font-size:14px;margin:0 0 18px;line-height:1.7}
.badge{display:inline-block;padding:4px 12px;border-radius:20px;font-size:11px;font-weight:800;letter-spacing:.5px;background:rgba(79,195,247,.24);color:#4FC3F7}
.badge-new{background:linear-gradient(135deg,#4FC3F7,#4FC3F7);color:#0A1929}
.badge-hot{background:linear-gradient(135deg,#e91e63,#ff5722);color:#fff}
.badge-wk{background:linear-gradient(135deg,#9c27b0,#673ab7);color:#fff}
.badge-ref{background:linear-gradient(135deg,#2196f3,#00bcd4);color:#fff}
.note{color:#8a8a95;font-size:13px;margin-top:28px;padding:16px;background:rgba(255,255,255,.02);border-radius:10px;border-left:3px solid #4FC3F7}

/* ─── faq accordion ─── */
.faq-wrap{max-width:820px}
.faq-item{background:linear-gradient(180deg,rgba(255,255,255,.03),rgba(255,255,255,.01));border:1px solid rgba(255,255,255,.06);border-radius:14px;padding:22px 26px;margin:12px 0;transition:border-color .2s}
.faq-item[open]{border-color:#4FC3F7}
.faq-item summary{cursor:pointer;font-weight:700;font-size:16px;color:#fff;list-style:none;padding-right:32px;position:relative}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:'+';position:absolute;right:0;top:-2px;font-size:24px;color:#4FC3F7;transition:transform .2s}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-a{margin-top:16px;padding-top:16px;border-top:1px solid rgba(255,255,255,.05);color:#b8b8c0;line-height:1.8;font-size:14px}
.faq-a a{color:#4FC3F7}

/* ─── about grid ─── */
.about-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px}
.about-card{background:linear-gradient(180deg,rgba(255,255,255,.03),rgba(255,255,255,.01));border:1px solid rgba(255,255,255,.06);border-radius:16px;padding:32px 26px}
.about-num{font-size:32px;font-weight:900;color:#4FC3F7;margin-bottom:12px;letter-spacing:1px;opacity:.6}
.about-card h3{font-size:18px;font-weight:800;margin:0 0 12px;color:#fff}
.about-card p{color:#a8a8b0;font-size:14px;margin:0;line-height:1.7}

/* ─── contact ─── */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px;margin-bottom:40px}
.contact-card{background:linear-gradient(180deg,rgba(255,255,255,.03),rgba(255,255,255,.01));border:1px solid rgba(255,255,255,.06);border-radius:16px;padding:30px 22px;text-align:center}
.contact-ico{font-size:44px;margin-bottom:12px}
.contact-card h3{font-size:17px;font-weight:800;margin:0 0 8px;color:#fff}
.contact-card p{color:#a8a8b0;font-size:13px;margin:0;line-height:1.6}
.contact-note{background:linear-gradient(180deg,rgba(255,255,255,.03),rgba(255,255,255,.01));border:1px solid rgba(255,255,255,.06);border-radius:16px;padding:32px;text-align:center}
.contact-note h3{color:#4FC3F7;font-size:20px;font-weight:800;margin:0 0 20px}
.contact-note ul{list-style:none;padding:0;margin:0 0 28px;text-align:left;max-width:520px;margin-left:auto;margin-right:auto}
.contact-note li{padding:10px 0;color:#c8c8cf;font-size:15px;border-bottom:1px solid rgba(255,255,255,.05)}
.contact-note li:last-child{border:0}
.contact-note strong{color:#4FC3F7;margin-right:8px}

/* ─── footer ─── */
.site-footer{background:linear-gradient(180deg,rgba(0,0,0,.4),#0A1929);border-top:1px solid rgba(255,255,255,.06);padding:60px 24px 40px;text-align:center;margin-top:60px}
.footer-inner{max-width:800px;margin:0 auto}
.foot-brand{display:inline-flex;align-items:center;gap:10px;padding:14px 28px;border:1px solid rgba(79,195,247,.24);border-radius:14px;margin-bottom:20px}
.foot-brand-name{font-size:22px;font-weight:900;color:#4FC3F7}
.foot-tag{color:#a8a8b0;font-size:15px;margin:0 0 24px}
.foot-links{display:flex;justify-content:center;gap:12px;flex-wrap:wrap;margin:32px 0 20px;font-size:14px}
.foot-links a{color:#c8c8cf}
.foot-links a:hover{color:#4FC3F7}
.foot-links span{color:#3a3a45}
.copyright{color:#8a8a95;font-size:13px;margin:20px 0 8px;padding-top:20px;border-top:1px solid rgba(255,255,255,.06)}
.foot-note{color:#6a6a75;font-size:12px;margin:0}

/* ─── responsive ─── */
@media(max-width:900px){
  .mainnav{position:fixed;top:0;right:-100%;height:100vh;width:280px;background:#0a0a0a;flex-direction:column;justify-content:flex-start;padding:80px 24px 24px;transition:right .25s;box-shadow:-8px 0 30px rgba(0,0,0,.5)}
  .mainnav.open{right:0}
  .nav-link{padding:14px 20px;font-size:16px}
  .mobmenu-btn{display:flex}
  .topcta .btn-outline{display:none}
  .topbar-inner{padding:10px 16px}
  .brand-name{font-size:18px}
  .hero{padding:60px 20px 50px}
  .hero-title{font-size:38px}
  .hero-desc{font-size:16px}
  .btn-xl{padding:14px 26px;font-size:15px}
  .page-hero{padding:50px 16px 32px}
  .page-hero h1{font-size:28px}
  .section{padding:40px 0}
}