/* ===========================================================
   나비효과플랜 — Butterfly Effect Plan
   원본 아임웹 사이트 실측값 기반 재구축
   =========================================================== */

:root{
  --bg:#000;
  --fg:#fff;
  --gold:#F5D888;          /* 원본 실측 rgb(245,216,136) */
  --line:rgba(255,255,255,.35);

  --nav-x:clamp(12px,.8vw,16px);   /* 원본 좌측 10px */
  --content-x:clamp(20px,7.8vw,200px);
  --nav-top:74px;
  --nav-step:45px;

  --sans:'Montserrat','Pretendard Variable',Pretendard,-apple-system,'Apple SD Gothic Neo','Malgun Gothic',sans-serif;
  --serif:'Playfair Display',Georgia,serif;
  --ease:cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--fg);
  font-family:var(--sans);
  font-weight:400;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3{margin:0;font-weight:400}
p{margin:0}
:focus-visible{outline:2px solid var(--gold);outline-offset:3px}

.skip{position:absolute;left:-9999px;top:0;background:var(--gold);color:#000;padding:10px 16px;z-index:1000}
.skip:focus{left:8px;top:8px}

/* -----------------------------------------------------------
   외곽선 글자 — 원본 기법
   배경과 같은 검정으로 칠하고 흰 그림자를 네 방향으로 두른다.
   (-webkit-text-stroke 는 한글 획이 뭉쳐서 쓰지 않는다)
----------------------------------------------------------- */
.outline{
  color:#000;
  text-shadow:
    -1px -1px 0 #fff,
     1px -1px 0 #fff,
    -1px  1px 0 #fff,
     1px  1px 0 #fff;
}

/* ---------- 커서 추적 골드 원 ---------- */
.pointer{
  position:fixed;
  top:0;left:0;
  width:32px;height:32px;
  border-radius:50%;
  background:var(--gold);
  mix-blend-mode:difference;
  z-index:999999;
  pointer-events:none;
  transform:translate(-50%,-50%);
  opacity:0;
}
.pointer.on{opacity:1}
@media (hover:none),(prefers-reduced-motion:reduce){ .pointer{display:none} }

/* ---------- 좌측 고정 내비 ---------- */
.nav{
  position:fixed;
  top:var(--nav-top);
  left:var(--nav-x);
  z-index:50;
}
/* 원본: hover 시 ↗ 가 글자 왼쪽에 나타나며 텍스트를 22px 밀어낸다 */
.nav a{
  position:relative;
  display:block;
  height:var(--nav-step);
  font-size:17px;
  font-weight:400;
  line-height:27px;
  color:#fff;
  width:max-content;
  padding-left:0;
  transition:padding-left .3s var(--ease),color .3s var(--ease);
}
.nav a::before{
  content:'↗';
  position:absolute;
  left:0;top:0;
  line-height:27px;
  opacity:0;
  transform:translateX(-6px);
  transition:opacity .3s var(--ease),transform .3s var(--ease);
}
.nav a:hover,
.nav a.is-active{padding-left:22px}
.nav a:hover::before,
.nav a.is-active::before{opacity:1;transform:translateX(0)}

.nav__brand{font-weight:700}
.nav__item.is-active{color:rgba(255,255,255,.75)}

/* 우측 상단 마크 */
.mark{
  position:fixed;
  top:var(--nav-top);
  right:clamp(16px,1vw,25px);
  z-index:50;
  width:79px;
  transition:transform .5s var(--ease);
}
.mark:hover{transform:rotate(-8deg) scale(1.06)}

.navtoggle{display:none}

/* ---------- 페이지 공통 ---------- */
main{padding:0 var(--content-x)}
.page{min-height:100vh;display:flex;flex-direction:column;justify-content:center;padding:150px 0 120px}

.display{
  font-family:var(--serif);
  font-size:clamp(48px,5.4vw,120px);
  line-height:1;
  letter-spacing:-.01em;
}

/* JS 가 살아 있을 때만 숨긴다. JS 가 죽으면 본문이 그냥 보이도록(빈 화면 방지) */
.js .reveal{opacity:0;transform:translateY(26px);transition:opacity .9s var(--ease),transform .9s var(--ease)}
.js .reveal.in{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  .marquee__track,.logos__track,.ripple__core::before,.ripple__core::after,.cue{animation:none!important}
}

/* ---------- HOME ---------- */
.hero{
  position:relative;
  min-height:100vh;
  display:flex;
  flex-direction:column;
  justify-content:center;
  align-items:center;
  overflow:hidden;
  padding:0;
  /* main 의 좌우 여백만큼 되돌려 화면 전체 폭을 쓴다.
     그러지 않으면 overflow:hidden 이 여백선에서 배경 원을 잘라 세로 경계가 생긴다. */
  margin:0 calc(-1 * var(--content-x));
}
/* 배경의 거대한 원. 단색이면 경계가 칼같이 잘려 색이 갈라져 보이므로
   가장자리를 부드럽게 흐리게 처리한다. */
.hero__backdrop{
  position:absolute;
  left:62%;top:44%;
  width:118vw;aspect-ratio:1;
  border-radius:50%;
  background:radial-gradient(circle at center,
    #161616 0%,
    #161616 55%,
    rgba(19,19,19,.55) 78%,
    rgba(0,0,0,0) 100%);
  transform:translate(-50%,-50%);
  z-index:0;pointer-events:none;
}

/* 물웅덩이(파문) — 원본 .outer/.inner 구조 재현 */
.ripple{position:absolute;left:74%;top:34%;z-index:1;pointer-events:none}
.ripple__core{
  position:absolute;
  width:150px;height:150px;
  margin:-75px 0 0 -75px;
  border-radius:50%;
  background:rgba(255,255,255,.2);
}
.ripple__core::before,
.ripple__core::after{
  content:'';
  position:absolute;
  left:50%;top:50%;
  width:300px;height:300px;
  margin:-150px 0 0 -150px;
  border-radius:50%;
  background:#fff;
  opacity:0;                 /* 지연 구간에 흰 원이 통째로 노출되는 것 방지 */
  animation:bigger 4s linear infinite backwards;
}
.ripple__core::after{animation-delay:2s}
@keyframes bigger{
  from{transform:scale(.5);opacity:.43}
  to  {transform:scale(4);opacity:0}
}

.hero__body{
  position:relative;
  z-index:2;
  display:flex;
  align-items:flex-start;
  gap:0;
  margin-top:-6vh;
  animation:rise 1.1s var(--ease) both;
}
@keyframes rise{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:none}}

.hero__bfly{width:clamp(170px,22vw,326px);flex:none}
.hero__title{
  margin-top:.1em;
  font-size:clamp(21px,2.2vw,32px);
  font-weight:400;
  letter-spacing:-.01em;
  white-space:nowrap;
}

/* 마퀴 */
.marquee{
  position:absolute;
  left:0;bottom:clamp(60px,12vh,150px);
  width:100vw;
  overflow:hidden;
  z-index:2;
}
.marquee__track{display:flex;width:max-content;animation:slide 34s linear infinite}
.marquee__track span{
  flex:none;
  padding-right:.45em;
  font-size:clamp(42px,7.2vw,92px);
  font-weight:700;
  line-height:1.7;
}
@keyframes slide{from{transform:translateX(0)}to{transform:translateX(-50%)}}

/* ---------- ABOUT ---------- */
.about__head{
  font-size:clamp(24px,4.4vw,56px);
  font-weight:400;
  line-height:1.45;
  letter-spacing:-.02em;
}
.about__head strong{font-weight:700}
.rule{border:0;border-top:1px solid var(--line);margin:clamp(30px,5vh,58px) 0 clamp(20px,3vh,32px);transition-delay:.12s}
.about__note{font-size:clamp(14px,1.7vw,22px);font-weight:500;transition-delay:.2s}
.about__note b{font-weight:700}
.cue{
  position:absolute;
  left:50%;bottom:70px;
  font-size:30px;
  animation:bob 2.1s ease-in-out infinite;
}
@keyframes bob{0%,100%{transform:translateY(0);opacity:.5}50%{transform:translateY(12px);opacity:1}}

/* ---------- SERVICE ---------- */
.service .display{margin-bottom:clamp(34px,5vh,64px)}
.svc{
  /* 행 제목(큰 글자)과 채널 칩(작은 글자)의 시각적 중심을 맞춘다 */
  display:flex;flex-wrap:wrap;align-items:center;
  gap:20px 40px;
  padding:clamp(22px,3vh,34px) 0;
  border-top:1px solid var(--line);
}
.svc:last-of-type{border-bottom:1px solid var(--line)}
.svc__name{
  flex:0 0 clamp(200px,22vw,340px);
  display:flex;align-items:center;gap:14px;
  font-size:clamp(26px,3vw,44px);
  font-weight:400;
}
.svc__name i{font-style:normal;font-size:.62em}
.chips{flex:1 1 300px;display:flex;flex-wrap:wrap;align-items:center;gap:14px 26px;margin:0;padding:0;list-style:none}
.chips li{display:flex;align-items:center;gap:9px;font-size:clamp(14px,1.3vw,20px);font-weight:500;white-space:nowrap}
.chips img{width:28px;height:28px;object-fit:contain;flex:none}
.chips .chips__wide img{width:auto;height:28px}

/* ---------- PORTFOLIO ---------- */
.portfolio{padding-top:clamp(70px,10vh,130px)}
.portfolio .display{margin-bottom:clamp(30px,4vh,52px)}
.logos{position:relative;width:100%;background:#fff;border-radius:14px;padding:26px 0;overflow:hidden;transition-delay:.1s}
.logos::before,.logos::after{content:'';position:absolute;top:0;bottom:0;width:70px;z-index:2;pointer-events:none}
.logos::before{left:0;background:linear-gradient(90deg,#fff,transparent)}
.logos::after{right:0;background:linear-gradient(270deg,#fff,transparent)}
/* gap 을 쓰면 두 벌의 폭이 gap 하나만큼 어긋나 -50% 지점에서 툭 끊긴다.
   각 항목의 margin-right 로 간격을 주어야 앞뒤 벌의 폭이 정확히 같아진다. */
.logos__track{display:flex;align-items:center;width:max-content;animation:slide 42s linear infinite}
.logos__track img{height:52px;width:auto;max-width:190px;margin-right:56px;object-fit:contain;flex:none;filter:grayscale(1);opacity:.72;transition:filter .4s var(--ease),opacity .4s var(--ease)}
.logos__track img:hover{filter:none;opacity:1}

/* ---------- COLUMN (목록) ---------- */
.column .display{margin-bottom:clamp(34px,5vh,64px)}
.col-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(300px,1fr));
  gap:clamp(28px,3vw,52px) clamp(24px,2.4vw,40px);
}
.col-card{display:block;transition:transform .4s var(--ease)}
.col-card:hover{transform:translateY(-6px)}
.col-card__thumb{
  width:100%;aspect-ratio:4/3;
  object-fit:cover;
  background:#111;
  border-radius:8px;
}
.col-card__title{
  margin-top:18px;
  font-size:clamp(15px,1.2vw,18px);
  font-weight:700;
  line-height:1.45;
}
.col-card__excerpt{
  margin-top:10px;
  font-size:clamp(12px,.95vw,14px);
  line-height:1.65;
  color:rgba(255,255,255,.62);
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.col-card__date{margin-top:12px;font-size:12px;color:rgba(255,255,255,.42)}
.col-empty{margin-top:40px;color:rgba(255,255,255,.5);font-size:15px}

/* ---------- 글 본문 / 약관 공통 ---------- */
.doc{max-width:820px}
.doc__meta{margin-top:18px;font-size:13px;color:rgba(255,255,255,.45)}
.doc__thumb{width:100%;margin:38px 0 12px;border-radius:10px}
.doc__body{margin-top:34px;font-size:clamp(15px,1.1vw,17px);line-height:1.9;color:rgba(255,255,255,.88)}
.doc__body h2{margin:44px 0 14px;font-size:clamp(19px,1.6vw,24px);font-weight:700;line-height:1.4}
.doc__body h3{margin:32px 0 10px;font-size:clamp(16px,1.3vw,19px);font-weight:700}
.doc__body p{margin:0 0 20px}
.doc__body ul,.doc__body ol{margin:0 0 20px;padding-left:22px}
.doc__body li{margin-bottom:8px}
.doc__body strong{font-weight:700;color:#fff}
.doc__body a{color:var(--gold);text-decoration:underline;text-underline-offset:3px}
.doc__body table{width:100%;border-collapse:collapse;margin:0 0 24px;font-size:14px}
.doc__body th,.doc__body td{border:1px solid rgba(255,255,255,.2);padding:10px 12px;text-align:left;vertical-align:top}
.doc__body th{background:rgba(255,255,255,.06);font-weight:600;white-space:nowrap}
.doc__back{display:inline-block;margin-top:56px;font-size:14px;color:rgba(255,255,255,.7)}
.doc__back:hover{color:var(--gold)}

/* ---------- CONTACT ---------- */
/* 원본 실측: 본문 좌측 200/2560=7.8%, 폼 좌측 52.5vw, 폼 폭 36.4vw
   absolute 로 띄우면 부모 높이에 잡히지 않아 푸터와 겹치므로 그리드로 배치한다. */
.contact{
  display:grid;
  grid-template-columns:calc(52.5vw - var(--content-x)) 36.4vw;
  align-items:start;
}
.contact__intro p{margin-top:26px;font-size:clamp(14px,1.7vw,22px);font-weight:500;line-height:1.2}

.form{
  width:100%;
  background:#fff;color:#111;
  border-radius:12px;
  padding:clamp(24px,2.4vw,44px);
  transition-delay:.1s;
}
.f{display:block;margin-bottom:26px;border:0;padding:0;min-width:0}
.f__label{display:block;font-size:14px;font-weight:600;color:#333;margin-bottom:8px}
.f__label i{font-style:normal;color:#e0335a}
.f__label a{color:#666;text-decoration:underline}

.form input[type=text],.form input[type=email],.form input[type=tel],.form textarea{
  width:100%;border:0;border-bottom:1px solid #ccc;background:transparent;
  padding:8px 2px;font:inherit;font-size:15px;color:#111;
  transition:border-color .3s var(--ease);
}
.form textarea{resize:vertical;border:1px solid #ddd;border-radius:6px;padding:10px}
.form input:focus,.form textarea:focus{outline:none;border-color:var(--gold)}

.f__tel{display:flex;align-items:center;gap:8px}
.f__tel input{width:88px;text-align:center}
.f__tel em{font-style:normal;color:#aaa}

.cb{display:flex;align-items:center;gap:9px;margin:9px 0;font-size:15px;cursor:pointer}
.cb input{appearance:none;width:19px;height:19px;flex:none;border:1.5px solid #bbb;border-radius:4px;cursor:pointer;position:relative;transition:all .2s var(--ease)}
.cb input:checked{background:var(--gold);border-color:var(--gold)}
.cb input:checked::after{content:'';position:absolute;left:6px;top:2px;width:5px;height:10px;border:solid #333;border-width:0 2px 2px 0;transform:rotate(45deg)}
.cb--etc .inline{width:auto;flex:1 1 140px;font-size:14px}

.btn{
  width:100%;height:46px;
  border:0;border-radius:30px;
  background:var(--gold);color:#000;
  font:inherit;font-size:18px;font-weight:600;
  cursor:pointer;
  transition:filter .3s var(--ease),transform .2s var(--ease);
}
.btn:hover{filter:brightness(1.07)}
.btn:active{transform:scale(.985)}
.btn[disabled]{opacity:.55;cursor:progress}
.form__msg{margin:0 0 14px;font-size:14px;font-weight:600;min-height:1.2em}
.form__msg.err{color:#d12b52}
.form__msg.ok{color:#1a8f4a}

/* ---------- FOOTER ---------- */
.foot{padding:clamp(40px,6vh,70px) var(--content-x) 110px;text-align:center;font-size:12px;line-height:2;color:rgba(255,255,255,.72)}
.foot__brand{font-size:13px;font-weight:700;color:#fff;margin-bottom:14px}
.foot__links{margin-top:10px}
.foot__links a{margin:0 6px;text-decoration:underline;text-underline-offset:3px}
.foot__biz{margin-top:14px;color:rgba(255,255,255,.5)}

.copyright{position:fixed;left:var(--nav-x);bottom:26px;z-index:40;font-size:15px;font-weight:700;pointer-events:none}

/* ---------- 반응형 ---------- */
@media (max-width:1024px){
  .navtoggle{
    display:flex;position:fixed;top:20px;left:var(--nav-x);z-index:60;
    width:40px;height:40px;flex-direction:column;justify-content:center;gap:7px;
    background:none;border:0;padding:0;cursor:pointer;
  }
  .navtoggle span{display:block;width:26px;height:2px;background:#fff;transition:transform .35s var(--ease)}
  .navtoggle[aria-expanded=true] span:first-child{transform:translateY(4.5px) rotate(45deg)}
  .navtoggle[aria-expanded=true] span:last-child{transform:translateY(-4.5px) rotate(-45deg)}

  .nav{
    top:0;left:0;width:100%;height:100dvh;
    padding:96px var(--content-x) 0;
    background:rgba(0,0,0,.97);
    opacity:0;visibility:hidden;
    transition:opacity .35s var(--ease),visibility .35s;
  }
  .nav.open{opacity:1;visibility:visible}
  .nav a{font-size:24px;height:52px;line-height:36px}

  .hero__body{flex-direction:column;align-items:flex-start;gap:14px;margin-left:0}
  .hero__title{white-space:normal}
  .ripple{left:78%;top:26%}

  .contact{display:block}
  .form{width:100%;margin-top:40px}
  .cue{left:auto;right:0}
}

@media (max-width:640px){
  .hero__bfly{width:150px}
  .svc__name{flex:1 1 100%}
  .chips{gap:12px 18px}
  .logos__track{gap:34px}
  .logos__track img{height:40px}
  .copyright{font-size:12px;bottom:18px}
  .f__tel input{width:auto;min-width:0;flex:1}
  .ripple{display:none}
}