/* ============================================================
   SANDTONE 샌드톤 — 공유 스타일시트
   피부톤에서 시작하는 선케어 · 실행DAY 데모 사이트
   ============================================================ */

:root{
  --canvas:#F4EFE5;
  --panel:#FBF8F1;
  --ink:#1C1611;
  --ink-soft:#2A231B;
  --clay:#9C4A21;
  --clay-deep:#7C3915;
  --clay-tint:#E9D9C9;
  --text:#26201A;
  --text-2:#6E6355;
  --line:#DDD3C2;
  --line-strong:#B3A791;
  --over:#FBF7EE;
  --over-dim:#D9CFBF;
  --tshadow:0 1px 2px rgba(10,7,4,.9),0 4px 16px rgba(10,7,4,.7),0 12px 48px rgba(10,7,4,.65);
  --e-out:cubic-bezier(.22,.61,.36,1);
  --serif:"Pretendard Variable",Pretendard,system-ui,-apple-system,sans-serif;
  --sans:"Pretendard Variable",Pretendard,system-ui,-apple-system,sans-serif;
  --pad:clamp(20px,5vw,72px);
  --maxw:1200px;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
html,body{overflow-x:clip}
body{
  background:var(--canvas);color:var(--text);
  font-family:var(--sans);font-weight:400;line-height:1.75;
  -webkit-font-smoothing:antialiased;letter-spacing:-.01em;
  word-break:keep-all;overflow-wrap:break-word;
}
img,video{display:block;max-width:100%}
button,input,textarea{font:inherit;color:inherit}
a{color:inherit}
:focus-visible{outline:2px solid var(--clay);outline-offset:3px;border-radius:2px}
::selection{background:var(--clay);color:#fff}

h1,h2,h3,.serif{font-family:var(--serif);font-weight:700;line-height:1.32;letter-spacing:-.02em;color:var(--ink)}
.on-dark h1,.on-dark h2,.on-dark h3{color:var(--over)}

.kicker{
  font-family:var(--sans);font-size:11px;font-weight:700;letter-spacing:.22em;
  text-transform:uppercase;color:var(--clay);display:block;margin-bottom:18px;
}
.kicker.kd{color:var(--over-dim)}
.lede{font-size:clamp(15px,1.5vw,17.5px);color:var(--text-2);line-height:1.9;max-width:56ch}
.wrap{max-width:var(--maxw);margin:0 auto;padding-left:var(--pad);padding-right:var(--pad)}
section{position:relative}

/* ── 스킵 링크 ── */
.skip{position:absolute;left:-9999px;top:0;z-index:300;background:var(--ink);color:var(--over);padding:12px 20px}
.skip:focus{left:0}

/* ── 내비게이션 ── */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:16px var(--pad);
  transition:background .45s var(--e-out),border-color .45s var(--e-out);
  border-bottom:1px solid transparent;
}
.nav.solid{background:rgba(244,239,229,.9);backdrop-filter:blur(14px) saturate(1.15);border-bottom-color:var(--line)}
.nav .brand{text-decoration:none;line-height:1.15;display:block}
.nav .brand b{font-family:var(--serif);font-weight:700;font-size:19px;letter-spacing:.14em;color:var(--ink)}
.nav .brand span{display:block;font-size:9.5px;letter-spacing:.3em;color:var(--text-2);margin-top:2px}
.nav.on-video:not(.solid) .brand b{color:var(--over);text-shadow:var(--tshadow)}
.nav.on-video:not(.solid) .brand span{color:var(--over-dim);text-shadow:var(--tshadow)}
.nav-links{display:flex;gap:clamp(18px,2.6vw,34px);list-style:none;align-items:center}
.nav-links a{
  text-decoration:none;font-size:14px;font-weight:500;color:var(--text);
  padding:6px 0;border-bottom:1.5px solid transparent;
  transition:border-color .3s var(--e-out),color .3s var(--e-out);
}
.nav-links a:hover{color:var(--clay)}
.nav-links a[aria-current="page"]{border-bottom-color:var(--clay);color:var(--clay);font-weight:600}
.nav.on-video:not(.solid) .nav-links a{color:var(--over);text-shadow:var(--tshadow)}
.nav.on-video:not(.solid) .nav-links a[aria-current="page"]{color:var(--over);border-bottom-color:var(--over)}

/* 모바일 메뉴 */
.menu-btn{
  display:none;background:none;border:0;cursor:pointer;padding:10px;margin-right:-10px;
  flex-direction:column;gap:5px;z-index:120;
}
.menu-btn i{display:block;width:22px;height:1.5px;background:var(--ink);transition:transform .4s var(--e-out),opacity .3s,background .3s}
.nav.on-video:not(.solid) .menu-btn i{background:var(--over)}
body.menu-open .menu-btn i{background:var(--over)}
body.menu-open .menu-btn i:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
body.menu-open .menu-btn i:nth-child(2){opacity:0}
body.menu-open .menu-btn i:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}
.mobile-menu{
  position:fixed;inset:0;z-index:110;background:var(--ink);color:var(--over);
  display:flex;flex-direction:column;justify-content:center;padding:0 var(--pad);
  opacity:0;visibility:hidden;transition:opacity .45s var(--e-out),visibility .45s;
}
body.menu-open .mobile-menu{opacity:1;visibility:visible}
.mobile-menu ul{list-style:none}
.mobile-menu a{
  display:block;text-decoration:none;font-family:var(--serif);font-weight:700;
  font-size:clamp(30px,8vw,44px);color:var(--over);padding:12px 0;line-height:1.25;
  border-bottom:1px solid rgba(217,207,191,.16);
  transform:translateY(18px);opacity:0;transition:transform .55s var(--e-out),opacity .55s var(--e-out);
}
.mobile-menu a[aria-current="page"]{color:var(--clay-tint)}
body.menu-open .mobile-menu a{transform:none;opacity:1}
body.menu-open .mobile-menu li:nth-child(1) a{transition-delay:.08s}
body.menu-open .mobile-menu li:nth-child(2) a{transition-delay:.14s}
body.menu-open .mobile-menu li:nth-child(3) a{transition-delay:.2s}
body.menu-open .mobile-menu li:nth-child(4) a{transition-delay:.26s}
body.menu-open .mobile-menu li:nth-child(5) a{transition-delay:.32s}
.mobile-menu .mm-foot{margin-top:34px;font-size:12px;letter-spacing:.2em;color:var(--over-dim)}
body.menu-open{overflow:hidden}
@media (max-width:820px){
  .nav-links{display:none}
  .menu-btn{display:flex}
}

/* ── 버튼 ── */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  text-decoration:none;text-align:center;cursor:pointer;
  background:var(--ink);color:var(--over);font-weight:600;font-size:14.5px;
  padding:14px 30px;border:1px solid var(--ink);border-radius:999px;
  transition:background .35s var(--e-out),transform .35s var(--e-out),box-shadow .35s var(--e-out),color .35s var(--e-out);
}
.btn:hover{background:var(--clay);border-color:var(--clay);transform:translateY(-2px);box-shadow:0 10px 26px rgba(156,74,33,.28)}
.btn:active{transform:translateY(0)}
.btn .arr{transition:transform .35s var(--e-out)}
.btn:hover .arr{transform:translateX(4px)}
.btn.ghost{background:transparent;color:var(--ink)}
.btn.ghost:hover{background:var(--ink);color:var(--over);box-shadow:none}
.btn.light{background:var(--over);color:var(--ink);border-color:var(--over)}
.btn.light:hover{background:var(--clay-tint);border-color:var(--clay-tint);color:var(--ink);box-shadow:none}
.btn.ghost-light{background:transparent;color:var(--over);border-color:rgba(251,247,238,.55)}
.btn.ghost-light:hover{background:rgba(251,247,238,.14);border-color:var(--over);box-shadow:none}
.btn.big{font-size:16px;padding:17px 36px}
@media (pointer:coarse){.btn{min-height:44px}}

/* ── 등장 안무 ── */
.rise{opacity:0;transform:translateY(28px);transition:opacity .9s var(--e-out),transform .9s var(--e-out)}
.rise.in{opacity:1;transform:none}
.rise.d1{transition-delay:.1s}.rise.d2{transition-delay:.2s}.rise.d3{transition-delay:.3s}
.hairline{width:100%;height:1px;background:var(--line);transform-origin:left center;transform:scaleX(0);transition:transform 1.3s var(--e-out)}
.in .hairline,.hairline.in{transform:scaleX(1)}

/* ── 마퀴 ── */
.marquee{
  overflow:hidden;border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  padding:20px 0;background:var(--panel);
}
.marquee .track{display:flex;gap:0;width:max-content;animation:marq 34s linear infinite}
.marquee span{
  font-family:var(--serif);font-weight:600;font-size:clamp(15px,1.7vw,19px);
  color:var(--text-2);white-space:nowrap;padding:0 1.4em;display:flex;align-items:center;gap:2.8em;
}
.marquee span::after{content:"";width:5px;height:5px;border-radius:50%;background:var(--clay);opacity:.55}
@keyframes marq{to{transform:translateX(-50%)}}

/* ── 브레드크럼 ── */
.crumb{font-size:12.5px;color:var(--text-2);letter-spacing:.02em}
.crumb ol{list-style:none;display:flex;gap:8px;flex-wrap:wrap}
.crumb li+li::before{content:"/";margin-right:8px;color:var(--line-strong)}
.crumb a{color:inherit;text-decoration:none}
.crumb a:hover{color:var(--clay)}

/* ── 페이지 히어로 (서브 페이지 공통) ── */
.page-hero{padding:calc(84px + clamp(48px,9vh,110px)) 0 clamp(40px,6vh,70px)}
.page-hero h1{font-size:clamp(34px,5.4vw,58px);max-width:17ch;margin-top:20px}
.page-hero .lede{margin-top:24px}

/* ── 에디토리얼 글 목록 (이야기) ── */
.post-list{border-top:1px solid var(--line)}
.post-item{border-bottom:1px solid var(--line)}
.post-item a{
  display:grid;grid-template-columns:120px 1fr auto;gap:clamp(18px,3.4vw,52px);
  align-items:baseline;text-decoration:none;padding:clamp(24px,3.6vw,40px) 0;
  transition:padding-left .4s var(--e-out);
}
.post-item time{font-size:12px;letter-spacing:.14em;color:var(--text-2)}
.post-item h3{font-size:clamp(19px,2.5vw,27px);transition:color .35s var(--e-out)}
.post-item p{margin-top:8px;font-size:14.5px;color:var(--text-2);max-width:52ch}
.post-item .tag{font-size:11px;font-weight:700;letter-spacing:.18em;color:var(--clay);white-space:nowrap}
.post-item a:hover{padding-left:14px}
.post-item a:hover h3{color:var(--clay)}
@media (max-width:720px){
  .post-item a{grid-template-columns:1fr;gap:8px}
  .post-item .tag{order:-1}
}

/* ── 아티클 본문 ── */
.article-head{padding:calc(84px + clamp(44px,8vh,96px)) 0 clamp(34px,5vh,54px)}
.article-head h1{font-size:clamp(30px,4.6vw,50px);max-width:19ch;margin-top:22px}
.article-head .meta{margin-top:26px;display:flex;gap:22px;flex-wrap:wrap;font-size:13px;color:var(--text-2)}
.article-head .meta b{color:var(--text);font-weight:600}
.prose{max-width:70ch;font-size:clamp(15.5px,1.35vw,17px);line-height:2}
.prose>*+*{margin-top:1.5em}
.prose h2{font-size:clamp(22px,2.6vw,29px);margin-top:2.4em;line-height:1.45}
.prose h3{font-size:clamp(18px,2vw,22px);margin-top:2em}
.prose strong{font-weight:700;color:var(--ink)}
.prose a{color:var(--clay);text-decoration-thickness:1px;text-underline-offset:3px}
.prose ul,.prose ol{padding-left:1.3em}
.prose li+li{margin-top:.5em}
.prose blockquote{
  border-left:2px solid var(--clay);padding:6px 0 6px 24px;
  font-family:var(--serif);font-size:1.12em;color:var(--ink-soft);font-weight:600;line-height:1.75;
}
.prose .note{font-size:.86em;color:var(--text-2);border-top:1px solid var(--line);padding-top:1.2em}
.prose figure img{border-radius:14px}
.prose figcaption{margin-top:10px;font-size:12.5px;color:var(--text-2)}
.article-foot{margin-top:clamp(50px,8vh,80px);padding-top:30px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap;align-items:center}
.article-foot .back{text-decoration:none;font-weight:600;font-size:14.5px;color:var(--clay)}

/* ── 인용 밴드 ── */
.quote-band{background:var(--ink);color:var(--over);padding:clamp(72px,11vh,130px) 0}
.quote-band blockquote{
  font-family:var(--serif);font-weight:600;font-size:clamp(21px,3.2vw,34px);
  line-height:1.65;max-width:26ch;color:var(--over);
}
.quote-band cite{display:block;margin-top:28px;font-style:normal;font-size:13px;letter-spacing:.16em;color:var(--over-dim)}
.quote-band .qmark{font-family:var(--serif);font-size:74px;line-height:.6;color:var(--clay-tint);opacity:.5;display:block;margin-bottom:26px}

/* ── FAQ ── */
.faq-list{border-top:1px solid var(--line)}
.faq-list details{border-bottom:1px solid var(--line)}
.faq-list summary{
  list-style:none;cursor:pointer;padding:24px 44px 24px 0;position:relative;
  font-family:var(--serif);font-weight:700;font-size:clamp(16.5px,1.9vw,21px);color:var(--ink);
  transition:color .3s var(--e-out);
}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary:hover{color:var(--clay)}
.faq-list summary::after{
  content:"";position:absolute;right:8px;top:50%;width:12px;height:12px;
  border-right:1.5px solid var(--clay);border-bottom:1.5px solid var(--clay);
  transform:translateY(-70%) rotate(45deg);transition:transform .4s var(--e-out);
}
.faq-list details[open] summary::after{transform:translateY(-20%) rotate(-135deg)}
.faq-list .ans{padding:0 0 28px;color:var(--text-2);font-size:15px;line-height:1.95;max-width:64ch}

/* ── 스크럽 스테이지 (스크롤이 영상을 돌린다) ── */
.scrub{position:relative;z-index:2}
.scrub-stage{position:sticky;top:0;height:100vh;height:100svh;overflow:hidden;background:#171008}
.scrub-stage .sp,.scrub-stage video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.scrub-stage .sp{background-size:cover;background-position:center;transition:opacity .8s var(--e-out)}
.scrub-stage video{opacity:0;transition:opacity .8s var(--e-out);will-change:transform;transform:translateZ(0)}
.scrub-stage.sv-ready video{opacity:1}
.scrub-stage.sv-ready .sp{opacity:0}
.scrub-stage.sv-failed video{display:none}
.scrub-stage .s-wash{
  position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(90deg,
    rgba(14,9,4,.88) 0%,rgba(14,9,4,.82) 18%,rgba(14,9,4,.66) 30%,
    rgba(14,9,4,.44) 40%,rgba(14,9,4,.2) 52%,rgba(14,9,4,.05) 62%,rgba(14,9,4,0) 72%);
}
.scrub-stage .s-vign{
  position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(10,7,3,.5) 0%,rgba(10,7,3,0) 24%,rgba(10,7,3,0) 72%,rgba(10,7,3,.45) 100%);
}
.sband{
  /* 히어로 영상의 제품이 좌측에 서 있어 텍스트는 우측 여백에 둔다 */
  position:absolute;right:var(--pad);top:50%;transform:translateY(-50%);
  width:min(480px,36vw);opacity:0;color:var(--over);text-shadow:var(--tshadow);z-index:3;pointer-events:none;
}
.sband.sb-left{right:auto;left:var(--pad)}  /* 마지막 비트 — 영상의 손이 우측에 등장 */
.sband .kicker{margin-bottom:14px}
.sband h1,.sband h2{font-size:clamp(27px,3.2vw,44px);color:var(--over);line-height:1.4}
.sband p{margin-top:18px;font-size:clamp(13.5px,1.15vw,16px);color:var(--over-dim);line-height:1.85;max-width:30ch}
.sband .row{margin-top:30px;display:flex;gap:10px;flex-wrap:wrap}
.sband a{pointer-events:auto;text-shadow:none}
.sband .ln{
  --kc:clamp(0,(var(--k,0) - var(--th,0))*3,1);
  display:block;opacity:var(--kc);transform:translateY(calc((1 - var(--kc))*26px));
}
.sband .row.ln{display:flex}
.scrub .cue{
  position:absolute;left:50%;bottom:26px;transform:translateX(-50%);z-index:4;
  font-size:10px;letter-spacing:.26em;color:var(--over-dim);
  display:flex;flex-direction:column;align-items:center;gap:9px;
  opacity:var(--cue,1);transition:opacity .5s var(--e-out);text-shadow:var(--tshadow);
}
.scrub .cue .bar{width:1px;height:34px;background:linear-gradient(180deg,rgba(251,247,238,.85),rgba(251,247,238,0));animation:cuepulse 2.6s var(--e-out) -.5s infinite}
@keyframes cuepulse{0%,100%{transform:scaleY(.5);opacity:.5}50%{transform:scaleY(1);opacity:1}}

/* 스크럽 정지 대체 — 휴대폰·세로·모션 축소에서는 일반 섹션으로 접는다 */
@media (max-width:820px),(orientation:portrait) and (pointer:coarse),(prefers-reduced-motion:reduce){
  .scrub{height:auto !important}
  .scrub-stage{position:relative;height:auto;background:var(--ink)}
  .scrub-stage .sp{position:relative;height:56svh;min-height:300px}
  .scrub-stage video,.scrub-stage .s-wash,.scrub-stage .s-vign,.scrub .cue{display:none}
  .sband{
    position:relative;left:auto;right:auto;top:auto;transform:none;width:auto;
    opacity:1 !important;padding:34px var(--pad) 0;text-shadow:none;
  }
  .sband:last-of-type{padding-bottom:48px}
  .sband .ln{opacity:1;transform:none}
  .sband p{max-width:none}
  .sband+.sband{border-top:1px solid rgba(217,207,191,.16);margin-top:32px}
}

/* ── 폼 ── */
form.card-form{background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:clamp(26px,3.6vw,40px)}
.field{margin-bottom:20px}
.field label{display:block;font-size:11px;font-weight:700;letter-spacing:.18em;color:var(--text-2);margin-bottom:9px;text-transform:uppercase}
.field input,.field textarea{
  width:100%;background:var(--canvas);border:1px solid var(--line);border-radius:10px;
  padding:13px 16px;font-size:15px;transition:border-color .3s var(--e-out),box-shadow .3s var(--e-out);
}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--clay);box-shadow:0 0 0 3px rgba(156,74,33,.14)}
.field textarea{min-height:110px;resize:vertical}
form.card-form .btn{width:100%}
.formnote{margin-top:14px;font-size:12.5px;color:var(--text-2);text-align:center}
.sent{
  margin-top:0;padding:0 18px;border-radius:12px;background:var(--clay-tint);
  border:1px solid var(--clay);font-size:14px;line-height:1.7;
  opacity:0;max-height:0;overflow:hidden;
  transition:opacity .6s var(--e-out),max-height .6s var(--e-out),padding .6s var(--e-out),margin-top .6s var(--e-out);
}
.sent.on{opacity:1;max-height:180px;padding:16px 18px;margin-top:18px}
.sent b{display:block;font-family:var(--serif);margin-bottom:4px}

/* ── 푸터 ── */
footer{background:var(--ink);color:#9A8F7E;padding:clamp(60px,9vh,96px) 0 44px;font-size:13.5px}
footer .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:clamp(28px,5vw,64px)}
footer .fbrand b{font-family:var(--serif);font-weight:700;font-size:22px;letter-spacing:.14em;color:var(--over);display:block}
footer .fbrand span{display:block;font-size:10px;letter-spacing:.3em;color:var(--over-dim);margin-top:5px}
footer .fbrand p{margin-top:20px;line-height:1.9;max-width:34ch}
footer h4{font-size:11px;font-weight:700;letter-spacing:.2em;color:var(--over-dim);margin-bottom:18px;text-transform:uppercase}
footer ul{list-style:none}
footer li+li{margin-top:10px}
footer a{color:#C9BFAE;text-decoration:none;transition:color .3s var(--e-out)}
footer a:hover{color:var(--over)}
footer .note{
  margin-top:clamp(44px,7vh,64px);padding-top:26px;border-top:1px solid rgba(217,207,191,.14);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:12px;line-height:1.8;
}
@media (max-width:720px){footer .cols{grid-template-columns:1fr;gap:36px}}

/* ── 모션 축소 ── */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;animation-iteration-count:1 !important;
    transition-duration:.001ms !important;transition-delay:0s !important;
  }
  html{scroll-behavior:auto}
  .rise{opacity:1;transform:none}
  .hairline{transform:scaleX(1)}
  .marquee .track{animation:none}
}