@charset "utf-8";
/* ══════════════════════════════════════════════════════════
   흐름 관측소 — 무료 공익 학습 커뮤니티 랜딩
   청화백자(백자 유약 + 코발트 청화) 색조 / H5 고정 폭
   ══════════════════════════════════════════════════════════ */

:root{
  /* 유약 — PC 배경과 본문 배경이 완전히 동일한 한 가지 색 */
  --porcelain:#E9F2F4;
  --glaze:#F5FAFB;
  --glaze-hi:#FCFEFE;

  --ink:#16202B;
  --ink-2:#48596B;
  --ink-3:#7C8D9B;

  --cobalt:#24408E;
  --cobalt-2:#3054AE;
  --celadon:#8FB0A5;

  --hair:rgba(22,32,43,.10);
  --hair-c:rgba(36,64,142,.18);

  --col:462px;
  --pad:22px;

  --f-body:'Noto Sans KR','Apple SD Gothic Neo',sans-serif;
  --f-disp:'Hahmlet','Noto Sans KR',serif;
  --f-mono:'IBM Plex Mono',ui-monospace,monospace;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  padding-bottom:132px;
  background:var(--porcelain);
  color:var(--ink);
  font-family:var(--f-body);
  font-weight:400;
  font-size:14px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{display:block;max-width:100%;height:auto}
h1,h2,h3,p,figure,blockquote{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--cobalt);outline-offset:3px}

/* ── 고정 폭 컬럼 ───────────────────────────────── */
.frame{
  position:relative;
  max-width:var(--col);
  margin:0 auto;
  padding:0 var(--pad);
}
/* ── 상단 브랜드 바 ─────────────────────────────── */
.topbar{
  display:flex;align-items:center;gap:9px;
  padding:18px 0 14px;
  border-bottom:1px solid var(--hair);
}
.brandmark{
  width:26px;height:26px;flex:0 0 26px;border-radius:50%;
  display:grid;place-items:center;
  border:1px solid var(--hair-c);
  background:linear-gradient(180deg,#fff,#E4EEF3);
  color:var(--cobalt);font-size:10px;
}
.brandname{font-family:var(--f-disp);font-weight:600;font-size:15px;letter-spacing:-.01em}
.brandlatin{
  margin-left:auto;font-family:var(--f-mono);font-size:9px;font-weight:400;
  letter-spacing:.2em;color:var(--ink-3);
}

/* ── 공통 라벨 / 타이틀 ─────────────────────────── */
.eyebrow{
  display:flex;align-items:center;gap:8px;
  font-family:var(--f-mono);font-size:10px;font-weight:500;
  letter-spacing:.16em;text-transform:uppercase;color:var(--cobalt);
}
.eyebrow__dot{
  width:5px;height:5px;border-radius:50%;background:var(--cobalt);
  box-shadow:0 0 0 4px rgba(36,64,142,.12);
  animation:pulse 2.6s ease-in-out infinite;
}
.sec{padding-top:46px}
.sec__title{
  font-family:var(--f-disp);font-weight:500;font-size:23.5px;line-height:1.45;
  letter-spacing:-.015em;margin-top:11px;
}
.sec__lead{margin-top:9px;font-size:13.5px;line-height:1.85;color:var(--ink-3)}

/* ══════════ HERO ══════════ */
.hero{padding-top:26px}
.hero__title{
  margin-top:14px;
  font-family:var(--f-disp);font-weight:500;
  font-size:clamp(28px,8.4vw,36px);line-height:1.38;letter-spacing:-.02em;
}
.hero__title .l{display:block}
.hero__title .l:nth-child(2){padding-left:.6em}
.brushed{
  font-style:normal;color:var(--cobalt);
  background:linear-gradient(transparent 62%,rgba(36,64,142,.15) 62%,rgba(36,64,142,.15) 94%,transparent 94%);
}

/* 관측 명판 — 이 페이지의 시그니처 */
.plate{position:relative;margin-top:30px;padding-bottom:12px}
.plate__spill{
  position:absolute;left:-14px;right:-14px;top:8%;bottom:0;
  width:auto;height:92%;z-index:1;mix-blend-mode:multiply;pointer-events:none;
}
.plate__frame{
  position:relative;z-index:2;
  width:76%;margin-left:auto;
  aspect-ratio:4/5;
  border-radius:50% 50% 5% 5% / 38% 38% 4% 4%;
  border:1px solid rgba(255,255,255,.85);
  outline:1px solid var(--hair-c);outline-offset:7px;
  background:var(--glaze);
  box-shadow:0 24px 44px -30px rgba(22,32,43,.55);
  overflow:hidden;
}
.plate__photo{position:relative;width:100%;height:100%;overflow:hidden;border-radius:inherit}
.plate__photo img{width:100%;height:100%;object-fit:cover;object-position:50% 8%}
.plate__glaze{
  position:absolute;inset:0;pointer-events:none;
  background:
    linear-gradient(180deg,rgba(36,64,142,.10),rgba(36,64,142,0) 38%),
    radial-gradient(130% 46% at 50% 104%,var(--porcelain),rgba(233,242,244,0) 62%);
}
.seal{
  position:absolute;left:2px;top:64px;z-index:4;
  width:64px;height:64px;border-radius:50%;
  display:grid;place-items:center;
  background:var(--glaze-hi);
  border:1px solid var(--cobalt);
  box-shadow:0 0 0 3px rgba(233,242,244,.9),0 10px 20px -14px rgba(22,32,43,.6);
  transform:rotate(-8deg);
}
.seal__t{
  font-size:10px;font-weight:600;line-height:1.35;text-align:center;
  color:var(--cobalt);letter-spacing:-.02em;
}
.nameplate{
  position:absolute;left:0;bottom:0;z-index:4;
  padding:11px 15px 12px 16px;
  background:var(--glaze-hi);
  border:1px solid var(--hair);
  border-left:2px solid var(--cobalt);
  border-radius:4px 13px 13px 4px;
  box-shadow:0 14px 30px -22px rgba(22,32,43,.7);
}
.nameplate__k{display:block;font-family:var(--f-disp);font-weight:600;font-size:16.5px;letter-spacing:-.01em}
.nameplate__r{display:block;margin-top:4px;font-size:10.5px;color:var(--ink-3);letter-spacing:-.01em}

.hero__lead{margin-top:26px;font-size:14.5px;line-height:1.9;color:var(--ink-2)}
.hero__lead b{font-weight:600;color:var(--cobalt)}
.hero .btn{margin-top:22px}

.quote{
  margin-top:26px;padding:2px 0 2px 16px;
  border-left:1px solid var(--hair-c);
}
.quote p{font-family:var(--f-disp);font-weight:400;font-size:14.5px;line-height:1.85;color:var(--ink-2)}
.quote cite{
  display:block;margin-top:10px;font-style:normal;
  font-family:var(--f-mono);font-size:10px;letter-spacing:.14em;color:var(--ink-3);
}
.quote cite::before{content:"— "}

/* ══════════ 버튼 ══════════ */
.btn{
  position:relative;overflow:hidden;isolation:isolate;
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  width:100%;min-height:54px;padding:0 18px;
  border:0;border-radius:14px;cursor:pointer;
  font-size:15.5px;font-weight:600;letter-spacing:-.015em;line-height:1;
  transition:filter .18s ease,box-shadow .18s ease,background-color .18s ease,border-color .18s ease;
}
.btn i{font-size:13.5px}

/* 주 버튼 — 살짝 튀어오르는 움직임 + 지나가는 빛 */
.btn--primary{
  color:#F1F7FB;
  background:linear-gradient(178deg,var(--cobalt-2),#1E3878);
  box-shadow:0 14px 28px -16px rgba(30,56,120,.75),inset 0 1px 0 rgba(255,255,255,.22);
  animation:hop 3s cubic-bezier(.3,.7,.3,1) 1.2s infinite;
}
.btn--primary::after{
  content:"";position:absolute;top:-10%;left:-45%;width:36%;height:120%;
  background:linear-gradient(100deg,rgba(255,255,255,0),rgba(255,255,255,.4),rgba(255,255,255,0));
  transform:skewX(-18deg);pointer-events:none;
  animation:shine 3s ease-in-out 1.2s infinite;
}
.btn--primary:hover{filter:brightness(1.08);animation-play-state:paused}
.btn--primary:hover::after{animation-duration:1.1s}
.btn--primary:active{filter:brightness(.97)}

.btn--ghost{
  margin-top:20px;
  color:var(--cobalt);background:var(--glaze-hi);
  border:1px solid var(--hair-c);
  box-shadow:0 8px 20px -18px rgba(22,32,43,.6);
}
.btn--ghost::after{
  content:"";position:absolute;top:-10%;left:-45%;width:34%;height:120%;
  background:linear-gradient(100deg,rgba(36,64,142,0),rgba(36,64,142,.09),rgba(36,64,142,0));
  transform:skewX(-18deg);pointer-events:none;opacity:0;
}
.btn--ghost:hover{background:#fff;border-color:var(--cobalt)}
.btn--ghost:hover::after{opacity:1;animation:shine 1.2s ease-in-out}

/* ══════════ 추상 그림 밴드 ══════════ */
/* 흐름 선 밴드 — 배경색에 녹여 넣는다 */
.band{
  margin-left:calc(var(--pad) * -1);
  margin-right:calc(var(--pad) * -1);
  height:148px;overflow:hidden;
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 14%,#000 86%,transparent);
          mask-image:linear-gradient(90deg,transparent,#000 14%,#000 86%,transparent);
}
.band img{width:100%;height:100%;object-fit:cover;object-position:50% 62%;mix-blend-mode:multiply}

/* 3단계 장면 — 인물이 들어간 사진이므로 액자로 처리 */
.ridge{
  position:relative;margin-top:22px;
  aspect-ratio:16/9;overflow:hidden;
  border-radius:16px;
  border:1px solid rgba(255,255,255,.85);
  box-shadow:0 20px 40px -30px rgba(22,32,43,.65);
}
.ridge img{width:100%;height:100%;object-fit:cover;object-position:50% 50%}
.ridge::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(200deg,rgba(233,242,244,.22),rgba(233,242,244,0) 42%);
}

/* ══════════ 무료 제공 카드 ══════════ */
.cards{margin-top:22px;display:grid;gap:12px}
.card{
  position:relative;
  padding:18px 18px 19px 68px;
  background:var(--glaze);
  border:1px solid rgba(255,255,255,.9);
  border-radius:16px;
  box-shadow:0 1px 1px rgba(22,32,43,.03),0 18px 34px -30px rgba(22,32,43,.7);
  transition:transform .2s ease,box-shadow .2s ease;
}
.card:hover{transform:translateY(-2px);box-shadow:0 1px 1px rgba(22,32,43,.03),0 22px 38px -28px rgba(22,32,43,.7)}
.card__ico{
  position:absolute;left:18px;top:18px;
  width:38px;height:38px;border-radius:11px;
  display:grid;place-items:center;
  color:var(--cobalt);font-size:15px;
  background:linear-gradient(180deg,#fff,#E4EDF4);
  border:1px solid var(--hair-c);
}
.card__t{font-size:15px;font-weight:600;line-height:1.5;letter-spacing:-.02em}
.card__d{margin-top:7px;font-size:13px;line-height:1.8;color:var(--ink-2)}

/* ══════════ 3단계 과정 ══════════ */
.steps{position:relative;margin-top:20px}
.steps::before{
  content:"";position:absolute;left:21px;top:30px;bottom:38px;width:1px;
  background:linear-gradient(to bottom,var(--hair-c),rgba(143,176,165,.55));
}
.step{display:grid;grid-template-columns:44px 1fr;gap:15px;padding:12px 0}
.step__n{
  position:relative;z-index:1;
  width:44px;height:44px;border-radius:50%;
  display:grid;place-items:center;
  background:var(--glaze-hi);border:1px solid var(--hair-c);
  font-family:var(--f-mono);font-size:11.5px;font-weight:500;color:var(--cobalt);
  letter-spacing:.02em;
}
.step__b{padding-top:2px}
.step__t{font-family:var(--f-disp);font-weight:500;font-size:17px;letter-spacing:-.015em;line-height:1.4}
.step__t span{display:block;margin-top:3px;font-family:var(--f-body);font-size:12.5px;font-weight:400;color:var(--ink-3)}
.step__d{margin-top:9px;font-size:13px;line-height:1.85;color:var(--ink-2)}

/* ══════════ 학습 환경 ══════════ */
.envcard{
  position:relative;overflow:hidden;
  margin-top:22px;padding:22px 20px 24px;
  background:var(--glaze);
  border:1px solid rgba(255,255,255,.9);
  border-radius:18px;
  box-shadow:0 1px 1px rgba(22,32,43,.03),0 20px 36px -30px rgba(22,32,43,.7);
}
.envcard__art{
  position:absolute;right:-14%;top:-16%;width:62%;
  opacity:.3;mix-blend-mode:multiply;pointer-events:none;
  -webkit-mask-image:radial-gradient(70% 70% at 78% 22%,#000,rgba(0,0,0,0));
          mask-image:radial-gradient(70% 70% at 78% 22%,#000,rgba(0,0,0,0));
}
.checks{position:relative;z-index:1;display:grid;gap:11px}
.checks li{
  display:grid;grid-template-columns:20px 1fr;gap:11px;align-items:start;
  font-size:13.5px;line-height:1.7;color:var(--ink-2);letter-spacing:-.01em;
}
.checks i{
  width:20px;height:20px;margin-top:1px;border-radius:6px;
  display:grid;place-items:center;font-size:8.5px;
  color:#33604F;background:rgba(143,176,165,.3);
}
.envcard .btn--ghost{position:relative;z-index:1}

.notice{
  margin-top:22px;padding:14px 15px;
  border:1px dashed var(--hair);border-radius:12px;
  background:rgba(255,255,255,.4);
  font-size:11.5px;line-height:1.9;color:var(--ink-3);
}

/* ══════════ 푸터 ══════════ */
.foot{margin-top:38px;padding:22px 0 32px;border-top:1px solid var(--hair)}
.foot__p{font-size:11.5px;line-height:1.85;color:var(--ink-3)}
.foot__nav{display:flex;flex-wrap:wrap;gap:8px;margin:15px 0 16px}
.lnk{
  display:inline-flex;align-items:center;gap:7px;
  padding:9px 14px;border-radius:999px;cursor:pointer;
  background:rgba(255,255,255,.55);border:1px solid var(--hair);
  font-size:11.5px;font-weight:500;color:var(--ink-2);letter-spacing:-.01em;
  transition:background-color .18s ease,border-color .18s ease;
}
.lnk i{font-size:10px;color:var(--cobalt)}
.lnk:hover{background:#fff;border-color:var(--hair-c)}
.foot__c{font-family:var(--f-mono);font-size:9.5px;letter-spacing:.12em;color:var(--ink-3)}

/* ══════════ 하단 고정 CTA ══════════ */
.dock{
  position:fixed;left:0;right:0;bottom:0;z-index:60;
  display:flex;justify-content:center;
  padding:30px var(--pad) calc(14px + env(safe-area-inset-bottom));
  pointer-events:none;
  background:linear-gradient(to top,var(--porcelain) 46%,rgba(233,242,244,.94) 70%,rgba(233,242,244,0));
}
.dock__in{width:100%;max-width:calc(var(--col) - var(--pad) * 2);pointer-events:auto}
.dock__note{
  display:flex;align-items:center;justify-content:center;gap:7px;
  margin-bottom:9px;font-size:10.5px;font-weight:500;color:var(--ink-3);letter-spacing:-.01em;
}
.dock__note i{font-size:10px;color:var(--cobalt)}
.btn--dock{
  min-height:52px;
  box-shadow:0 16px 30px -14px rgba(30,56,120,.7),inset 0 1px 0 rgba(255,255,255,.24);
  animation:hop 3s cubic-bezier(.3,.7,.3,1) 1.2s infinite,glow 3s ease-in-out 1.2s infinite;
}

/* ══════════ 약관 모달 ══════════ */
.modal[hidden]{display:none}
.modal{position:fixed;inset:0;z-index:200;display:flex;align-items:flex-end;justify-content:center}
.modal__bd{position:absolute;inset:0;background:rgba(17,27,37,.44);backdrop-filter:blur(3px);animation:fade .24s ease}
.modal__box{
  position:relative;display:flex;flex-direction:column;
  width:100%;max-width:var(--col);max-height:86vh;
  background:var(--glaze-hi);
  border-radius:20px 20px 0 0;
  box-shadow:0 -20px 60px -24px rgba(17,27,37,.5);
  overflow:hidden;animation:rise .3s cubic-bezier(.2,.8,.2,1);
}
.modal__hd{
  display:flex;align-items:center;gap:10px;
  padding:18px 18px 15px;border-bottom:1px solid var(--hair);
}
.modal__hd h2{
  display:flex;align-items:center;gap:9px;
  font-family:var(--f-disp);font-weight:600;font-size:16px;letter-spacing:-.01em;
}
.modal__hd h2 i{font-size:13px;color:var(--cobalt)}
.modal__x{
  margin-left:auto;width:34px;height:34px;flex:0 0 34px;
  border-radius:10px;border:1px solid var(--hair);
  background:transparent;color:var(--ink-2);font-size:13px;cursor:pointer;
}
.modal__x:hover{background:var(--porcelain)}
.modal__bt{overflow-y:auto;padding:18px 18px 28px;-webkit-overflow-scrolling:touch}
.modal__bt h3{margin:20px 0 7px;font-size:12.5px;font-weight:600;color:var(--cobalt);letter-spacing:-.01em}
.modal__bt h3:first-child{margin-top:0}
.modal__bt p{font-size:12.8px;line-height:1.95;color:var(--ink-2)}
body.locked{overflow:hidden}

@media (min-width:760px){
  .modal{align-items:center}
  .modal__box{border-radius:20px;max-height:80vh;box-shadow:0 30px 70px -30px rgba(17,27,37,.5)}
}

/* ══════════ 모션 ══════════ */
@keyframes pulse{0%,100%{box-shadow:0 0 0 4px rgba(36,64,142,.12)}50%{box-shadow:0 0 0 7px rgba(36,64,142,.04)}}
@keyframes fade{from{opacity:0}to{opacity:1}}
@keyframes rise{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:none}}
@keyframes draw{to{stroke-dashoffset:0}}
@keyframes hop{0%,70%,100%{transform:translateY(0)}78%{transform:translateY(-4px)}86%{transform:translateY(0)}92%{transform:translateY(-1.5px)}}
@keyframes shine{0%{left:-45%}44%{left:118%}100%{left:118%}}
@keyframes glow{
  0%,58%,100%{box-shadow:0 16px 30px -14px rgba(30,56,120,.7),0 0 0 0 rgba(36,64,142,0),inset 0 1px 0 rgba(255,255,255,.24)}
  80%{box-shadow:0 20px 38px -14px rgba(30,56,120,.86),0 0 0 7px rgba(36,64,142,.08),inset 0 1px 0 rgba(255,255,255,.3)}
}
@keyframes plateIn{from{opacity:0;transform:translateY(20px) scale(.985)}to{opacity:1;transform:none}}
@keyframes sealIn{from{opacity:0;transform:rotate(6deg) scale(.86)}to{opacity:1;transform:rotate(-8deg) scale(1)}}

.plate__spill .dr{stroke-dasharray:760;stroke-dashoffset:760;animation:draw 2s cubic-bezier(.25,.7,.2,1) .25s forwards}
.plate__spill .dr:nth-child(2){animation-delay:.45s}
.plate__spill .dr:nth-child(3){animation-delay:.65s}
.plate__dots{opacity:0;animation:fade .8s ease 1.5s forwards}
.plate__frame{animation:plateIn .9s cubic-bezier(.2,.8,.2,1) both}
.seal{animation:sealIn .7s cubic-bezier(.2,.9,.2,1) .8s both}
.nameplate{animation:rise .7s cubic-bezier(.2,.8,.2,1) .95s both}

.rv{opacity:0;transform:translateY(16px)}
.rv.in{opacity:1;transform:none;transition:opacity .8s ease,transform .8s cubic-bezier(.2,.8,.2,1)}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms !important;animation-delay:0s !important;transition-duration:.01ms !important}
  .btn--primary::after,.btn--ghost::after{display:none}
  .plate__spill .dr{stroke-dashoffset:0}
  .plate__dots{opacity:.5}
  .rv{opacity:1;transform:none}
}