/* OBSERVA — 외부 의존 없음(폰트·CDN 미사용). 파일만 옮기면 그대로 동작함. */

:root{
  --bg:#0B1220;
  --bg-2:#0F1829;
  --panel:#131F35;
  --line:#22314B;
  --ink:#E9F0FA;
  --ink-2:#A8BAD4;
  --ink-3:#7387A4;
  --acc:#5BE0C8;
  --acc-2:#63A8FF;
  --wrap:1160px;
  --r:16px;
  --ease:cubic-bezier(.22,.75,.3,1);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0; background:var(--bg); color:var(--ink);
  font-family:"Pretendard","Segoe UI",-apple-system,BlinkMacSystemFont,"Malgun Gothic","맑은 고딕",sans-serif;
  font-size:17px; line-height:1.75; letter-spacing:-.01em;
  -webkit-font-smoothing:antialiased;
}
img,svg{max-width:100%}
a{color:inherit}
h1,h2,h3{line-height:1.25; letter-spacing:-.03em; margin:0}
p{margin:0}
ul,ol,dl{margin:0; padding:0; list-style:none}

.wrap{width:min(100% - 40px, var(--wrap)); margin-inline:auto}
.skip{position:absolute; left:-9999px}
.skip:focus{left:12px; top:12px; z-index:200; background:var(--acc); color:#04121C; padding:10px 16px; border-radius:8px}

/* ── 버튼 ── */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  padding:13px 24px; border-radius:999px; border:1px solid transparent;
  background:linear-gradient(100deg,var(--acc),var(--acc-2)); color:#04121C;
  font-weight:700; font-size:15px; text-decoration:none; cursor:pointer;
  transition:transform .2s var(--ease), box-shadow .2s var(--ease), opacity .2s;
}
.btn:hover{transform:translateY(-2px); box-shadow:0 12px 28px -12px rgba(91,224,200,.55)}
.btn-ghost{background:transparent; border-color:var(--line); color:var(--ink)}
.btn-ghost:hover{border-color:var(--acc); box-shadow:none}
.btn-sm{padding:9px 18px; font-size:14px}
.btn-lg{padding:15px 30px; font-size:16px}
.btn-block{width:100%}

/* ── 헤더 ── */
.nav{position:sticky; top:0; z-index:100; backdrop-filter:blur(14px);
  background:rgba(11,18,32,.72); border-bottom:1px solid transparent; transition:border-color .3s, background .3s}
.nav.stuck{border-bottom-color:var(--line); background:rgba(11,18,32,.92)}
.nav-in{display:flex; align-items:center; justify-content:space-between; height:70px; gap:20px}
.brand{display:flex; align-items:center; gap:11px; text-decoration:none; font-weight:800; letter-spacing:.16em; font-size:15px}
.brand-mark{color:var(--acc); display:grid; place-items:center; flex:none}
/* 심볼 이미지는 배경이 투명하게 빠져 있다. 어두운 배경 위에 그대로 얹으면 된다.
   작게 줄었을 때 형태가 뭉개지지 않도록 약간의 발광만 더한다. */
.brand-img{display:block; filter:drop-shadow(0 0 6px rgba(99,168,255,.35))}
.nav-links{display:flex; align-items:center; gap:30px; font-size:15px}
.nav-links a{text-decoration:none; color:var(--ink-2); transition:color .2s}
.nav-links a:hover{color:var(--ink)}
.nav-links .btn{color:#04121C}
.nav-toggle{display:none; flex-direction:column; gap:5px; background:none; border:0; padding:8px; cursor:pointer}
.nav-toggle span{width:22px; height:2px; background:var(--ink); border-radius:2px; transition:.25s var(--ease)}

/* ── 히어로 ── */
.hero{position:relative; padding:118px 0 96px; overflow:hidden}
.hero-glow{position:absolute; inset:-30% 0 auto -10%; height:760px; pointer-events:none;
  background:
    radial-gradient(620px 420px at 18% 28%, rgba(91,224,200,.15), transparent 68%),
    radial-gradient(680px 460px at 82% 6%, rgba(99,168,255,.14), transparent 70%);
}
.hero-in{position:relative; display:grid; grid-template-columns:minmax(0,1.24fr) minmax(0,.76fr);
  column-gap:40px; align-items:center}
.hero-copy{grid-column:1; grid-row:1}
.hero-mark{grid-column:2; grid-row:1}
.hero-stats{grid-column:1 / -1; grid-row:2}
.eyebrow{font-size:12.5px; font-weight:800; letter-spacing:.24em; color:var(--acc); margin-bottom:20px}
/* 2단 히어로라 예전보다 폭이 좁다. 한 줄이 두 줄로 접히지 않는 선까지만 키운다 */
.hero h1{font-size:clamp(28px,5vw,56px); font-weight:800; margin-bottom:26px}
.grad{background:linear-gradient(100deg,var(--acc),var(--acc-2)); -webkit-background-clip:text; background-clip:text; color:transparent}
.lead{color:var(--ink-2); font-size:clamp(16px,1.9vw,19px); max-width:660px; margin-bottom:38px}
.lead strong{color:var(--ink); font-weight:700}
.hero-cta{display:flex; flex-wrap:wrap; gap:12px; margin-bottom:64px}

/* ── 히어로 심볼 영상 ──
   원본은 어두운 사각 영상이다. 원형 마스크로 네 모서리를 지워 배경에 그대로 녹인다.
   심볼이 프레임 폭의 약 74%를 차지하므로 70%까지는 불투명하게 두고 그 바깥만 페이드한다. */
.hero-mark{position:relative; display:grid; place-items:center; margin-bottom:64px}
.mark-video{
  position:relative; z-index:1;
  width:min(100%, 420px); aspect-ratio:1/1; object-fit:cover; display:block;
  border-radius:50%; background:transparent; pointer-events:none;
  -webkit-mask-image:radial-gradient(circle at 50% 50%, #000 57%, rgba(0,0,0,0) 75%);
  mask-image:radial-gradient(circle at 50% 50%, #000 57%, rgba(0,0,0,0) 75%);
  filter:saturate(1.06) contrast(1.03);
}
.mark-ring{
  position:absolute; inset:0; margin:auto; z-index:0;
  width:min(100%, 420px); aspect-ratio:1/1; border-radius:50%; pointer-events:none;
  background:radial-gradient(circle at 50% 50%, rgba(99,168,255,.16), rgba(91,224,200,.07) 46%, transparent 68%);
  animation:markPulse 6s var(--ease) infinite;
}
@keyframes markPulse{
  0%,100%{transform:scale(1); opacity:.85}
  50%{transform:scale(1.06); opacity:1}
}

.hero-stats{display:flex; flex-wrap:wrap; gap:14px}
.hero-stats li{flex:1 1 170px; border:1px solid var(--line); border-radius:var(--r); padding:20px 22px; background:rgba(19,31,53,.5)}
.hero-stats b{display:block; font-size:24px; letter-spacing:-.02em}
.hero-stats span{font-size:14px; color:var(--ink-3)}

/* ── 섹션 공통 ── */
.band{padding:96px 0; border-top:1px solid var(--line)}
.band-alt{background:var(--bg-2)}
.sec-title{font-size:clamp(27px,3.6vw,40px); font-weight:800; margin-bottom:18px}
.sec-sub{color:var(--ink-2); max-width:680px; margin-bottom:52px}
.grid-3{display:grid; grid-template-columns:repeat(auto-fit,minmax(280px,1fr)); gap:20px}

/* ── 문제 ── */
.pain{border:1px solid var(--line); border-radius:var(--r); padding:30px; background:var(--panel)}
.pain-no{font-size:12px; font-weight:800; letter-spacing:.18em; color:var(--acc)}
.pain h3{font-size:19px; margin:12px 0 10px}
.pain p{color:var(--ink-2); font-size:15.5px}

/* ── 솔루션 카드 ── */
.cards{display:grid; grid-template-columns:repeat(auto-fit,minmax(310px,1fr)); gap:22px}
.card{position:relative; border:1px solid var(--line); border-radius:20px; padding:34px 30px;
  background:linear-gradient(180deg,rgba(19,31,53,.85),rgba(15,24,41,.85));
  transition:transform .3s var(--ease), border-color .3s}
.card:hover{transform:translateY(-5px); border-color:rgba(91,224,200,.45)}
.card-icon{width:50px; height:50px; border-radius:14px; display:grid; place-items:center; color:var(--acc);
  background:rgba(91,224,200,.1); border:1px solid rgba(91,224,200,.22); margin-bottom:20px}
.card h3{font-size:21px; margin-bottom:6px}
.card-tag{font-size:13px; color:var(--acc); font-weight:600; margin-bottom:14px}
.card>p{color:var(--ink-2); font-size:15.5px}
.ticks{margin-top:18px; display:grid; gap:9px}
.ticks li{position:relative; padding-left:22px; font-size:14.5px; color:var(--ink-2)}
.ticks li::before{content:""; position:absolute; left:2px; top:9px; width:7px; height:7px; border-radius:50%;
  background:linear-gradient(100deg,var(--acc),var(--acc-2))}
.card-note{margin-top:18px; padding-top:16px; border-top:1px dashed var(--line); font-size:12.5px; color:var(--ink-3)}

/* ── 단계 ── */
.steps{counter-reset:s; display:grid; grid-template-columns:repeat(auto-fit,minmax(240px,1fr)); gap:20px}
.steps li{position:relative; border-top:2px solid var(--line); padding-top:22px}
.steps li:hover{border-top-color:var(--acc)}
.step-no{display:grid; place-items:center; width:34px; height:34px; border-radius:10px;
  background:rgba(91,224,200,.1); border:1px solid rgba(91,224,200,.25); color:var(--acc);
  font-weight:800; font-size:14px; margin-bottom:14px}
.steps h3{font-size:18px; margin-bottom:8px}
.steps p{color:var(--ink-2); font-size:15px}

/* ── 차별점 ── */
.why-in{display:grid; grid-template-columns:1.35fr .85fr; gap:52px; align-items:start}
.why-list{display:grid; gap:20px; margin-top:8px}
.why-list li{border-left:2px solid var(--line); padding-left:20px}
.why-list li:hover{border-left-color:var(--acc)}
.why-list b{display:block; font-size:17px; margin-bottom:5px}
.why-list span{color:var(--ink-2); font-size:15px}
.why-panel{border:1px solid var(--line); border-radius:20px; padding:30px; background:var(--panel); position:sticky; top:96px}
.why-panel h3{font-size:16px; letter-spacing:.06em; color:var(--acc); margin-bottom:20px}
.why-panel dt{font-weight:700; font-size:15.5px; margin-top:16px}
.why-panel dt:first-of-type{margin-top:0}
.why-panel dd{margin:5px 0 0; color:var(--ink-2); font-size:14.5px}

/* ── 요금 ── */
.price-grid{align-items:stretch}
.price{position:relative; border:1px solid var(--line); border-radius:20px; padding:32px 28px; background:var(--panel);
  display:flex; flex-direction:column}
.price-hi{border-color:rgba(91,224,200,.5); background:linear-gradient(180deg,rgba(91,224,200,.07),var(--panel))}
.price-badge{position:absolute; top:-11px; left:28px; background:linear-gradient(100deg,var(--acc),var(--acc-2));
  color:#04121C; font-size:11.5px; font-weight:800; padding:4px 12px; border-radius:999px}
.price h3{font-size:20px; margin-bottom:4px}
.price-for{font-size:13.5px; color:var(--ink-3); margin-bottom:16px}
.price-val{font-size:26px; font-weight:800; margin-bottom:18px}
.price .ticks{flex:1; margin-bottom:24px}

/* ── 문의 ── */
.contact-in{display:grid; grid-template-columns:1fr 1fr; gap:56px; align-items:start}
.contact-meta{margin-top:30px; display:grid; gap:10px; font-size:15px}
.contact-meta li{display:flex; gap:14px; color:var(--ink-2); font-size:14.5px}
.contact-meta span{flex:none; min-width:42px; color:var(--acc); font-size:13px; font-weight:700; padding-top:2px}
.contact-meta a{color:var(--acc); text-decoration:none}
.form{border:1px solid var(--line); border-radius:20px; padding:30px; background:var(--panel); display:grid; gap:15px}
.form .row{display:grid; grid-template-columns:1fr 1fr; gap:15px}
.form .field{display:grid; gap:7px; align-content:start}
.form label{font-size:14px; color:var(--ink-2)}
.form input,.form select,.form textarea{
  background:#0C1526; border:1px solid var(--line); border-radius:11px; padding:12px 14px;
  color:var(--ink); font:inherit; font-size:15px; width:100%; transition:border-color .2s}
.form input::placeholder,.form textarea::placeholder{color:#54678A}
.form input:focus,.form select:focus,.form textarea:focus{outline:none; border-color:var(--acc)}
.form textarea{resize:vertical}
.form-note{font-size:12.5px; color:var(--ink-3); text-align:center}

/* 필수 항목 표시·오류 */
.form-req{font-size:12.5px; color:var(--ink-3); margin-bottom:2px}
.req{color:var(--acc); font-weight:800}
.opt{font-size:11.5px; color:var(--ink-3); border:1px solid var(--line); border-radius:5px; padding:1px 6px; margin-left:4px}
.form input.invalid{border-color:#FF7A7A; background:rgba(255,122,122,.06)}
.err{font-size:12.5px; color:#FF9B9B}
.form-status{font-size:13.5px; text-align:center; border-radius:11px; padding:11px 14px; margin-top:-4px}
.form-status.ok{color:#062018; background:linear-gradient(100deg,var(--acc),var(--acc-2)); font-weight:700}
.form-status.bad{color:#FFC9C9; background:rgba(255,122,122,.1); border:1px solid rgba(255,122,122,.35)}
.hp{position:absolute; left:-9999px; width:1px; height:1px; opacity:0}

/* ── 푸터 ── */
.foot{border-top:1px solid var(--line); padding:52px 0 40px; background:var(--bg)}
.foot-in{display:grid; grid-template-columns:1fr 1.4fr; gap:40px}
.foot-brand{display:flex; gap:13px; align-items:flex-start}
.foot-brand .brand-mark{color:var(--acc)}
.foot-brand b{letter-spacing:.16em; font-size:14px}
.foot-brand p{color:var(--ink-3); font-size:14px; margin-top:4px}
.foot-legal p{font-size:13.5px; color:var(--ink-2)}
.foot-legal .fine{font-size:12.5px; color:var(--ink-3); line-height:1.7}
.foot-legal .copy{margin-top:18px; font-size:12.5px; color:var(--ink-3)}

/* ── 등장 애니메이션 ──
   기본값은 '보임'이다. 스크립트가 실행되는 환경에서만 숨겼다가 띄운다.
   인라인 스크립트 없이 CSS만으로 처리해 CSP를 엄격하게 유지한다.
   scripting 미지원 브라우저는 그냥 처음부터 보이므로 손해가 없다. */
@media (scripting: enabled){
  .reveal{opacity:0; transform:translateY(18px); transition:opacity .6s var(--ease), transform .6s var(--ease)}
  .reveal.in{opacity:1; transform:none}
}

/* ── 반응형 ── */
@media (max-width:980px){
  /* 좁아지면 심볼을 헤드라인 위로 올린다. 첫 화면에서 브랜드가 먼저 눈에 들어온다 */
  .hero-in{grid-template-columns:1fr; row-gap:0}
  .hero-copy{grid-column:1; grid-row:2}
  .hero-mark{grid-column:1; grid-row:1; margin-bottom:34px}
  .hero-stats{grid-row:3}
  .mark-video,.mark-ring{width:min(72vw, 300px)}
}
@media (max-width:900px){
  .why-in,.contact-in,.foot-in{grid-template-columns:1fr; gap:34px}
  .why-panel{position:static}
}
@media (max-width:720px){
  body{font-size:16px}
  .nav-links{position:fixed; inset:70px 0 auto; flex-direction:column; align-items:stretch; gap:0;
    background:var(--bg-2); border-bottom:1px solid var(--line); padding:10px 20px 22px;
    transform:translateY(-130%); transition:transform .3s var(--ease)}
  .nav-links.open{transform:none}
  .nav-links a{padding:14px 0; border-bottom:1px solid var(--line)}
  .nav-links .btn{margin-top:14px; border-bottom:0}
  .nav-toggle{display:flex}
  .nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
  .nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
  .hero{padding:78px 0 68px}
  .band{padding:68px 0}
  .form .row{grid-template-columns:1fr}
  .br-m{display:none}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1; transform:none; transition:none}
  .btn:hover,.card:hover{transform:none}
  .mark-ring{animation:none}
}