:root{--bg:#0a0d12;--bg2:#0f1319;--bg3:#141820;--green:#39ff8a;--border:rgba(57,255,138,0.15);--border-dim:rgba(255,255,255,0.07);--text:#f0f4f0;--text-muted:#8a9a8e;--text-dim:#4a5a4e;}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{font-family:'Pretendard',-apple-system,sans-serif;background:var(--bg);color:var(--text);overflow-x:hidden;}

/* NAV */
nav{position:fixed;top:0;left:0;right:0;z-index:100;padding:18px 52px;display:flex;align-items:center;justify-content:space-between;background:rgba(10,13,18,0.85);backdrop-filter:blur(20px);border-bottom:1px solid var(--border-dim);}
.logo a{display:flex;align-items:center;text-decoration:none;}
.logo img{height:26px;width:auto;display:block;}
.logo-text{font-size:18px;font-weight:800;letter-spacing:-0.5px;color:var(--text);}
.nav-links{display:flex;align-items:center;gap:32px;}
.nav-links a{font-size:14px;font-weight:500;color:var(--text-muted);text-decoration:none;transition:color 0.2s;}
.nav-links a:hover{color:var(--text);}
.nav-right{display:flex;align-items:center;gap:12px;}
.nav-cta{background:var(--green);color:#050805;font-family:'Pretendard',sans-serif;font-size:14px;font-weight:700;padding:10px 22px;border-radius:8px;border:none;cursor:pointer;transition:all 0.2s;text-decoration:none;white-space:nowrap;display:inline-block;}
.nav-cta:hover{background:#5cffa0;transform:translateY(-1px);box-shadow:0 4px 20px rgba(57,255,138,0.3);}
.nav-mobile-btn{display:none;background:none;border:none;cursor:pointer;padding:4px;}
.nav-mobile-btn span{display:block;width:22px;height:2px;background:var(--text-muted);margin:5px 0;transition:all 0.3s;}

/* FOOTER */
footer{background:var(--bg2);border-top:1px solid var(--border-dim);padding:48px 52px 40px;}
.footer-inner{max-width:1100px;margin:0 auto;}
.footer-nav-row{display:flex;flex-wrap:wrap;gap:24px;justify-content:center;padding-bottom:24px;border-bottom:1px solid var(--border-dim);margin-bottom:20px;}
.footer-nav-row a{font-size:14px;color:var(--text-muted);text-decoration:none;transition:color 0.2s;}
.footer-nav-row a:hover{color:var(--text);}
.footer-copy-row{text-align:center;font-size:13px;color:var(--text-dim);padding-bottom:28px;border-bottom:1px solid var(--border-dim);margin-bottom:28px;}
.footer-biz-row{display:grid;grid-template-columns:auto 1fr auto;gap:40px;align-items:start;}
.footer-biz-logo img{height:20px;opacity:0.55;}
.footer-biz-info{font-size:12px;color:var(--text-dim);line-height:2;}
.footer-biz-links{display:flex;flex-direction:column;gap:10px;align-items:flex-end;}
.footer-biz-links a{font-size:13px;color:var(--text-muted);text-decoration:none;transition:color 0.2s;}
.footer-biz-links a:hover{color:var(--text);}

/* DOC PAGES (terms/privacy) */
.doc-page{max-width:800px;margin:0 auto;padding:120px 48px 80px;}
.doc-page h1{font-size:clamp(28px,4vw,42px);font-weight:800;letter-spacing:-1.5px;margin-bottom:8px;}
.doc-badge{display:inline-block;font-size:12px;font-weight:700;letter-spacing:2px;text-transform:uppercase;color:var(--green);margin-bottom:32px;}
.doc-page h2{font-size:18px;font-weight:700;margin:40px 0 12px;color:var(--text);}
.doc-page p,.doc-page li{font-size:15px;color:var(--text-muted);line-height:1.8;margin-bottom:8px;}
.doc-page ol,.doc-page ul{padding-left:20px;margin-bottom:12px;}
.doc-page hr{border:none;border-top:1px solid var(--border-dim);margin:32px 0;}

/* AUTH PAGE */
.auth-page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:100px 24px 60px;position:relative;overflow:hidden;}
.auth-page::before{content:'';position:absolute;inset:0;background-image:linear-gradient(rgba(57,255,138,0.04) 1px,transparent 1px),linear-gradient(90deg,rgba(57,255,138,0.04) 1px,transparent 1px);background-size:60px 60px;mask-image:radial-gradient(ellipse 70% 70% at 50% 40%,black 20%,transparent 100%);}
.auth-glow{position:absolute;top:10%;left:50%;transform:translateX(-50%);width:600px;height:400px;background:radial-gradient(ellipse,rgba(57,255,138,0.07) 0%,transparent 70%);pointer-events:none;}
.auth-card{position:relative;z-index:1;background:var(--bg2);border:1.5px solid var(--border-dim);border-radius:24px;padding:48px 44px;width:100%;max-width:440px;text-align:center;}
.auth-logo{margin-bottom:32px;}
.auth-logo img{height:28px;}
.auth-title{font-size:26px;font-weight:800;letter-spacing:-1px;margin-bottom:8px;}
.auth-desc{font-size:15px;color:var(--text-muted);line-height:1.6;margin-bottom:36px;}
.social-btns{display:flex;flex-direction:column;gap:12px;margin-bottom:24px;}
.social-btn{display:flex;align-items:center;gap:14px;padding:16px 20px;border-radius:14px;border:1.5px solid var(--border-dim);background:var(--bg3);cursor:pointer;transition:all 0.25s;font-family:'Pretendard',sans-serif;font-size:15px;font-weight:600;color:var(--text);text-decoration:none;width:100%;}
.social-btn:hover{border-color:var(--border);background:rgba(57,255,138,0.04);transform:translateY(-1px);}
.social-btn.kakao{border-color:rgba(254,229,0,0.3);}
.social-btn.kakao:hover{border-color:rgba(254,229,0,0.7);background:rgba(254,229,0,0.06);}
.social-btn.naver{border-color:rgba(3,199,90,0.3);}
.social-btn.naver:hover{border-color:rgba(3,199,90,0.6);background:rgba(3,199,90,0.05);}
.social-btn.google{border-color:rgba(255,255,255,0.15);}
.social-btn.google:hover{border-color:rgba(255,255,255,0.35);}
.social-icon{width:30px;height:30px;border-radius:8px;display:flex;align-items:center;justify-content:center;flex-shrink:0;overflow:hidden;}
.social-icon svg{display:block;}
.kakao-icon{background:#FEE500;}
.naver-icon{background:#03C75A;}
.google-icon{background:#fff;}
.terms-agree{font-size:12px;color:var(--text-muted);line-height:1.8;}
.terms-agree a{color:var(--text-muted);text-decoration:underline;}
.back-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;color:#00FF94;text-decoration:none;margin-top:20px;transition:color 0.2s;}
.back-link:hover{color:#00FF94;opacity:0.8;}

/* RESPONSIVE */
@media(max-width:1024px){
  nav{padding:16px 32px;}
  footer{padding:40px 32px 32px;}
  .doc-page{padding:100px 32px 60px;}
}
@media(max-width:768px){
  nav{padding:14px 20px;}
  .nav-links{display:none;}
  .nav-links.open{display:flex;flex-direction:column;position:fixed;top:60px;left:0;right:0;background:rgba(10,13,18,0.97);backdrop-filter:blur(20px);border-bottom:1px solid var(--border-dim);padding:12px 0;z-index:99;}
  .nav-links.open a{padding:14px 24px;font-size:15px;}
  .nav-mobile-btn{display:block;}
  footer{padding:36px 20px 28px;}
  .footer-biz-row{grid-template-columns:1fr;gap:20px;}
  .footer-biz-links{align-items:flex-start;flex-direction:row;flex-wrap:wrap;gap:16px;}
  .footer-nav-row{gap:14px;}
  .doc-page{padding:90px 20px 60px;}
  .auth-card{padding:36px 24px;}
}