:root{
  --sky:#2BA8F0;
  --sky-deep:#1386D1;
  --sky-soft:#EAF6FE;
  --sky-mid:#CBE9FC;
  --ink:#141A21;
  --ink-2:#3B4552;
  --ink-3:#7A8594;
  --line:#E6EAEF;
  --bg-2:#F6F8FA;
  --r:20px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:72px}
body{font-family:"Pretendard Variable",Pretendard,-apple-system,"Apple SD Gothic Neo","Noto Sans KR",sans-serif;color:var(--ink);background:#fff;-webkit-font-smoothing:antialiased;letter-spacing:-0.02em;word-break:keep-all;overflow-wrap:break-word;padding-bottom:96px}
a{color:inherit;text-decoration:none}
.wrap{max-width:1160px;margin:0 auto;padding:0 24px}
h1,h2,h3{font-weight:800;letter-spacing:-0.035em;text-wrap:balance}
p{text-wrap:pretty}

/* NAV */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.88);backdrop-filter:blur(14px);border-bottom:1px solid transparent;transition:border-color .2s}
.nav.scrolled{border-color:var(--line)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:68px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px}
.logo-h{height:40px;width:auto;mix-blend-mode:multiply;display:block}
.logo-img{height:42px;width:auto;mix-blend-mode:multiply}
.logo-word{height:18px;width:auto;mix-blend-mode:multiply}
.foot-logo{width:200px;height:auto;mix-blend-mode:multiply;margin-bottom:8px}
.logo-mark{width:34px;height:34px;border-radius:10px;border:1.5px dashed var(--sky);display:grid;place-items:center;font-size:10px;font-weight:600;color:var(--sky);letter-spacing:0}
.nav ul{display:flex;gap:36px;list-style:none;font-size:15px;font-weight:600;color:var(--ink-2)}
.nav ul a:hover{color:var(--sky-deep)}
.nav-cta{background:var(--ink);color:#fff;font-size:14px;font-weight:700;padding:10px 18px;border-radius:999px}
@media(max-width:860px){.nav ul{display:none}}

/* HERO */
.hero{padding:96px 0 80px;text-align:center;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;inset:-40% -10% auto;height:560px;background:radial-gradient(closest-side,var(--sky-soft),transparent);z-index:-1}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:700;color:var(--sky-deep);background:var(--sky-soft);padding:8px 14px;border-radius:999px}
.eyebrow i{width:6px;height:6px;border-radius:50%;background:var(--sky)}
.hero h1{font-size:clamp(38px,5.6vw,64px);line-height:1.22;margin:26px 0 22px}
.hero h1 em{font-style:normal;color:var(--sky)}
.hero p.lead{font-size:clamp(17px,1.6vw,20px);color:var(--ink-2);line-height:1.7}
.hero-btns{display:flex;gap:12px;justify-content:center;margin-top:36px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;font-weight:700;font-size:16px;padding:16px 26px;border-radius:14px;transition:transform .15s,background .15s}
.btn:hover{transform:translateY(-2px)}
.btn-sky{background:var(--sky);color:#fff}
.btn-sky:hover{background:var(--sky-deep)}
.btn-line{background:#fff;border:1.5px solid var(--line);color:var(--ink)}
.hero-media{margin-top:64px}
.hero-media .pic{width:100%;height:520px;display:block}

/* SECTION */
section.sec{padding:120px 0}
section.gray{background:var(--bg-2)}
.sec-head{margin-bottom:56px}
.sec-head.center{text-align:center}
.tag{font-size:15px;font-weight:700;color:var(--sky-deep);margin-bottom:14px;display:block}
.sec-head h2{font-size:clamp(30px,3.6vw,44px);line-height:1.3}
.sec-head p{font-size:18px;color:var(--ink-3);margin-top:16px;line-height:1.65}

/* static picture */
.pic{position:relative;overflow:hidden;background:var(--bg-2)}
.pic img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transform-origin:50% 50%;display:block}
.pic-empty{display:grid;place-items:center;color:var(--ink-3);font-size:14px;border:1.5px dashed #C5CDD6}
/* placeholder text */
.ph{color:var(--ink-3);background:repeating-linear-gradient(90deg,transparent 0 6px,transparent 6px);border-bottom:1.5px dashed #C5CDD6;padding-bottom:2px}
[contenteditable]:focus{outline:2px solid var(--sky-mid);outline-offset:3px;border-radius:4px}

/* INSTRUCTOR */
.inst{display:grid;grid-template-columns:420px 1fr;gap:72px;align-items:start}
.inst .pic{width:100%;height:520px;display:block}
.inst-name{display:flex;align-items:baseline;gap:12px;margin-bottom:10px}
.inst-name h3{font-size:40px}
.inst-name span{font-size:18px;font-weight:600;color:var(--ink-3)}
.inst-quote{font-size:20px;line-height:1.6;color:var(--ink-2);font-weight:500;margin:20px 0 40px;padding-top:20px;border-top:1px solid var(--line)}
.career{display:grid;gap:28px}
.career-group h4{font-size:14px;font-weight:700;color:var(--sky-deep);letter-spacing:.02em;margin-bottom:12px}
.career-group ul{list-style:none;display:grid;gap:10px}
.career-group li{display:grid;grid-template-columns:92px 1fr;gap:16px;font-size:16.5px;line-height:1.5;padding:14px 0;border-bottom:1px solid var(--line)}
.career-group li b{font-weight:700;color:var(--ink);font-variant-numeric:tabular-nums}
.career-group li span{color:var(--ink-2);min-width:0}
.career-group li{word-break:keep-all}
@media(max-width:960px){.inst{grid-template-columns:1fr;gap:40px}.inst .pic{height:440px}}

/* SERVICE OVERVIEW */
.svc-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.svc-card{background:#fff;border:1px solid var(--line);border-radius:28px;padding:44px;display:flex;flex-direction:column;transition:box-shadow .2s,transform .2s}
.svc-card:hover{box-shadow:0 20px 50px -20px rgba(20,60,100,.18);transform:translateY(-4px)}
.svc-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:28px}
.svc-num{font-size:14px;font-weight:700;color:var(--ink-3)}
.chip{font-size:13px;font-weight:700;padding:6px 12px;border-radius:999px;background:var(--sky-soft);color:var(--sky-deep)}
.chip.new{background:var(--sky);color:#fff}
.svc-card h3{font-size:30px;line-height:1.3;margin-bottom:12px}
.svc-card .sub{font-size:17px;color:var(--ink-3);line-height:1.6}
.svc-list{list-style:none;margin:28px 0 36px;display:grid;gap:12px}
.svc-list li{display:flex;gap:10px;font-size:16px;color:var(--ink-2);font-weight:500}
.svc-list li::before{content:"";flex:none;width:20px;height:20px;border-radius:50%;background:var(--sky-soft) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Cpath d='M6 10.5l2.5 2.5L14 7.5' fill='none' stroke='%231386D1' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/20px no-repeat;margin-top:1px}
.price{margin-top:auto;display:flex;align-items:flex-end;justify-content:space-between;padding-top:28px;border-top:1px solid var(--line)}
.price small{display:block;font-size:14px;color:var(--ink-3);font-weight:600;margin-bottom:6px}
.price strong{font-size:34px;font-weight:800;letter-spacing:-0.03em}
.price strong span{font-size:18px;font-weight:700;color:var(--ink-2);margin-left:2px}
.price a{font-size:15px;font-weight:700;color:var(--sky-deep)}
.bonus{margin-top:14px;font-size:14px;font-weight:600;color:var(--sky-deep);background:var(--sky-soft);border-radius:12px;padding:10px 14px}
@media(max-width:860px){.svc-grid{grid-template-columns:1fr}.svc-card{padding:32px}}

/* SERVICE 1 */
.s1-top{display:flex;justify-content:space-between;align-items:flex-end;gap:40px;flex-wrap:wrap}
.thu{display:flex;align-items:center;gap:16px;background:var(--sky-soft);border-radius:20px;padding:18px 24px}
.thu .day{width:56px;height:56px;border-radius:16px;background:var(--sky);color:#fff;display:grid;place-items:center;font-size:22px;font-weight:800}
.thu b{display:block;font-size:18px}
.thu small{font-size:14px;color:var(--ink-2);font-weight:500}
.prog{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:64px}
.prog-item{background:#fff;border-radius:var(--r);padding:28px 24px;border:1px solid var(--line);min-height:200px;display:flex;flex-direction:column}
.prog-item .n{font-size:13px;font-weight:700;color:var(--sky);margin-bottom:auto}
.prog-item h4{font-size:20px;font-weight:700;margin:40px 0 8px}
.prog-item p{font-size:15px;color:var(--ink-3);line-height:1.6}
.gallery{display:grid;grid-template-columns:2fr 1fr 1fr;grid-template-rows:240px 240px;gap:16px;margin-bottom:64px}
.gallery .pic{width:100%;height:100%;display:block}
.gallery .g1{grid-row:span 2}
.gallery .g4{grid-column:span 2}
.sub-h{font-size:22px;font-weight:800;margin-bottom:20px;display:flex;align-items:center;gap:10px}
.info{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.info-card{background:#fff;border-radius:var(--r);padding:28px;border:1px solid var(--line)}
.info-card .ic{width:44px;height:44px;border-radius:12px;background:var(--sky-soft);display:grid;place-items:center;margin-bottom:20px}
.info-card .ic svg{width:22px;height:22px;stroke:var(--sky-deep);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.info-card small{font-size:14px;font-weight:700;color:var(--ink-3)}
.info-card p{font-size:18px;font-weight:600;margin-top:6px;line-height:1.55;min-height:56px}
@media(max-width:960px){.prog{grid-template-columns:1fr 1fr}.info{grid-template-columns:1fr}.gallery{grid-template-columns:1fr 1fr;grid-template-rows:200px 200px 200px}.gallery .g1{grid-row:auto;grid-column:span 2}.gallery .g4{grid-column:span 2}}

/* SERVICE 2 */
.s2{background:linear-gradient(180deg,#fff 0%,var(--sky-soft) 100%)}
/* 3D stage */
.stage3d{perspective:2200px;perspective-origin:50% 30%;margin:0 0 96px;padding:20px 0 40px}
.stage-inner{position:relative;transform-style:preserve-3d;transform:rotateX(14deg) rotateY(-16deg) rotateZ(3deg);transition:transform .9s cubic-bezier(.2,.7,.2,1);width:76%;margin-left:6%}
.stage3d:hover .stage-inner{transform:rotateX(8deg) rotateY(-9deg) rotateZ(1.5deg)}
.browser{background:#fff;border-radius:18px;box-shadow:-30px 60px 90px -30px rgba(19,90,150,.45),0 0 0 1px rgba(19,134,209,.1);overflow:hidden;transform:translateZ(0)}
.zoom{position:absolute;margin:0;background:#fff;border-radius:16px;padding:8px;box-shadow:-24px 40px 60px -18px rgba(15,70,120,.45),0 0 0 1px rgba(19,134,209,.12);transform-style:preserve-3d;transition:transform .9s cubic-bezier(.2,.7,.2,1)}
.zoom .pic{display:block;width:100%;border-radius:10px;overflow:hidden}
.zoom figcaption{position:absolute;top:-16px;left:16px;background:var(--ink);color:#fff;font-size:13px;font-weight:700;padding:7px 12px;border-radius:999px;display:flex;gap:8px;z-index:2;white-space:nowrap}
.zoom figcaption b{color:var(--sky)}
.zoom-btn{position:absolute;right:16px;bottom:16px;width:40px;height:40px;border-radius:12px;border:0;background:rgba(20,26,33,.78);color:#fff;display:grid;place-items:center;cursor:zoom-in;opacity:0;transition:opacity .2s;z-index:2}
.zoom:hover .zoom-btn{opacity:1}
.zoom-btn svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round}
.z1{width:40%;top:-6%;right:-26%;transform:translateZ(70px)}
.z1 .pic{height:220px}
.z2{width:36%;bottom:4%;right:-20%;transform:translateZ(110px)}
.z2 .pic{height:200px}
.z3{width:26%;bottom:-12%;left:-2%;transform:translateZ(150px)}
.z3 .pic{height:300px}
.stage3d:hover .z1{transform:translateZ(90px)}
.stage3d:hover .z2{transform:translateZ(140px)}
.stage3d:hover .z3{transform:translateZ(190px)}
/* lightbox */
.lb{position:fixed;inset:0;z-index:200;background:rgba(10,16,24,.82);backdrop-filter:blur(6px);display:none;align-items:center;justify-content:center;padding:40px;cursor:zoom-out}
.lb.open{display:flex}
.lb img{max-width:100%;max-height:100%;border-radius:12px;box-shadow:0 30px 80px rgba(0,0,0,.5);background:#fff}
.lb-close{position:absolute;top:20px;right:24px;color:#fff;font-size:30px;background:none;border:0;cursor:pointer}
@media(max-width:960px){
  .stage3d{perspective:none;padding:0}
  .stage-inner,.stage3d:hover .stage-inner{transform:none;width:100%;margin:0;display:grid;grid-template-columns:1fr 1fr;gap:28px 16px}
  .browser{grid-column:span 2}
  .zoom,.stage3d:hover .zoom{position:relative;inset:auto;width:auto;transform:none}
  .z3{grid-column:span 2}
  .z1 .pic,.z2 .pic,.z3 .pic{height:220px}
}
.browser-bar{height:44px;display:flex;align-items:center;gap:8px;padding:0 18px;border-bottom:1px solid var(--line);background:#FBFCFD}
.browser-bar i{width:11px;height:11px;border-radius:50%;background:#E3E7EC}
.browser-bar .url{margin-left:16px;flex:1;max-width:340px;height:26px;border-radius:8px;background:var(--bg-2);font-size:12px;color:var(--ink-3);display:flex;align-items:center;padding:0 12px;font-weight:500}
.browser .pic{width:100%;aspect-ratio:16/10;height:auto;display:block}
.feat{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.feat-item{background:#fff;border-radius:var(--r);padding:32px 26px;border:1px solid rgba(19,134,209,.12)}
.feat-item .k{font-size:13px;font-weight:700;color:var(--sky-deep);margin-bottom:22px;display:block}
.feat-item h4{font-size:21px;font-weight:800;line-height:1.35;margin-bottom:10px}
.feat-item p{font-size:15px;color:var(--ink-3);line-height:1.6}
.shots{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:16px}
.shots .pic{width:100%;height:300px;display:block}
@media(max-width:960px){.feat{grid-template-columns:1fr 1fr}}

/* PRICING */
.plans{display:grid;grid-template-columns:1fr 1fr;gap:24px;max-width:920px;margin:0 auto}
.plan{border-radius:28px;padding:44px;border:1px solid var(--line);background:#fff;position:relative}
.plan.best{background:var(--ink);color:#fff;border-color:var(--ink)}
.plan.best .muted{color:#A9B4C2}
.plan .badge{position:absolute;top:-14px;left:44px;background:var(--sky);color:#fff;font-size:13px;font-weight:700;padding:7px 14px;border-radius:999px}
.plan h3{font-size:22px;margin-bottom:6px}
.plan .muted{font-size:15px;color:var(--ink-3)}
.plan .amt{font-size:46px;font-weight:800;letter-spacing:-0.04em;margin:28px 0 4px}
.plan .amt span{font-size:18px;font-weight:600;opacity:.7;margin-left:4px}
.plan ul{list-style:none;margin:28px 0 36px;display:grid;gap:12px;font-size:16px}
.plan li{display:flex;gap:10px}
.plan li::before{content:"✓";color:var(--sky);font-weight:800}
.plan .btn{width:100%;justify-content:center}
.plan.best .btn{background:var(--sky);color:#fff}
@media(max-width:760px){.plans{grid-template-columns:1fr}}

/* FOOTER */
footer{border-top:1px solid var(--line);padding:48px 0;color:var(--ink-3);font-size:14px;line-height:1.8}
footer .wrap{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap}
footer b{color:var(--ink);font-size:16px}

/* FLOATING CTA */
.float{position:fixed;left:50%;bottom:20px;transform:translateX(-50%);z-index:100;display:flex;gap:8px;padding:8px;background:rgba(255,255,255,.92);backdrop-filter:blur(16px);border-radius:20px;box-shadow:0 16px 40px -12px rgba(20,40,70,.28),0 0 0 1px rgba(20,40,70,.06);width:min(560px,calc(100% - 32px))}
.float a{flex:1;display:flex;align-items:center;justify-content:center;gap:8px;height:56px;border-radius:14px;font-weight:700;font-size:16px;transition:background .15s}
.float .f1{background:var(--sky);color:#fff}
.float .f1:hover{background:var(--sky-deep)}
.float .f2{background:var(--ink);color:#fff}
.float .f2:hover{background:#2A3441}
.float svg{width:18px;height:18px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.float small{font-size:12px;font-weight:600;opacity:.75}
@media(max-width:480px){.float small{display:none}}
.f-txt{display:flex;flex-direction:column;align-items:flex-start;line-height:1.2}
.tel-num{display:none;font-style:normal;font-variant-numeric:tabular-nums;letter-spacing:0}
@media (hover:hover) and (pointer:fine){
  .tel-num{display:inline}
  .float{width:min(620px,calc(100% - 32px))}
  .float a{height:62px}
  .float .tel-num{font-size:14px;font-weight:600;opacity:.85;margin-top:3px}
  .nav-cta .tel-num,.plan .btn .tel-num{margin-left:10px;padding-left:10px;border-left:1px solid currentColor;border-left-color:rgba(127,127,127,.45);font-weight:600}
}
.copied-tip{position:fixed;left:50%;bottom:104px;transform:translateX(-50%);background:#141A21;color:#fff;font-size:14px;font-weight:600;padding:10px 16px;border-radius:999px;z-index:300;opacity:0;transition:opacity .2s;pointer-events:none}

.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}