/* DEHEAT site — Tesla-style: full-screen panels, one message each, light spec sections.
   Every panel's darkness = that film's real tint level (opacity = 1 − VLT). */

:root{
  --ink:#060D18;          /* night glass */
  --navy:#0B1E33;
  --paper:#F5F6F8;        /* light section ground */
  --line:#DDE1E6;
  --mute:#5C6470;
  --sky-hot:#F2A65A;
  --sky-pale:#F6E3C7;
  --heat:#FF6A3D;         /* brand accent */
  --heat-dark:#D9481C;
  --white:#FFFFFF;
  --white-70:rgba(255,255,255,.72);
  --white-40:rgba(255,255,255,.42);
  --white-15:rgba(255,255,255,.15);
  --f-display:'Bricolage Grotesque','IBM Plex Sans KR',sans-serif;
  --f-body:'IBM Plex Sans KR','Apple SD Gothic Neo','Malgun Gothic',sans-serif;
  --f-mono:'IBM Plex Mono',ui-monospace,monospace;
  --gutter:max(20px,env(safe-area-inset-left,0px));
  --gutter-r:max(20px,env(safe-area-inset-right,0px));
  --maxw:1120px;
  color-scheme:light;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:120px}
html.snap{scroll-snap-type:y proximity}
body{margin:0;background:var(--ink);color:var(--white);font-family:var(--f-body);font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);z-index:60;background:var(--ink)}
:focus-visible{outline:2px solid var(--heat);outline-offset:3px}

/* ---------- nav ---------- */
.nav{position:fixed;top:env(safe-area-inset-top,0px);left:0;right:0;z-index:50;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding-block:16px;padding-left:var(--gutter);padding-right:var(--gutter-r);transition:background .3s,padding .3s}
.nav.solid{background:rgba(6,13,24,.86);backdrop-filter:blur(10px);padding-block:10px}
.logo{display:inline-flex;background:var(--white);padding:6px 12px;border-radius:4px;line-height:0;flex:none}
.logo img{height:20px;width:auto}
.nav-links{display:flex;gap:2px}
.nav-links a,.nav-cta,.menu-btn{font-size:14px;font-weight:500;padding:8px 14px;border-radius:6px;transition:background .2s;color:var(--white)}
.nav-links a:hover,.nav-cta:hover,.menu-btn:hover{background:var(--white-15)}
.nav-links a[aria-current="page"]{background:var(--white-15)}
.nav-right{display:flex;gap:4px;align-items:center}
.menu-btn{display:none;border:0;background:var(--white-15);font-family:inherit;cursor:pointer}
@media (max-width:860px){.nav-links{display:none}.menu-btn{display:inline-flex}}

.menu{position:fixed;inset:0;z-index:70;background:var(--ink);display:flex;flex-direction:column;
  padding-block:calc(20px + env(safe-area-inset-top,0px)) calc(28px + env(safe-area-inset-bottom,0px));padding-left:var(--gutter);padding-right:var(--gutter-r)}
.menu-close{align-self:flex-end;border:0;background:var(--white-15);color:var(--white);font:inherit;font-size:14px;padding:8px 14px;border-radius:6px;cursor:pointer}
.menu nav{display:flex;flex-direction:column;margin-top:24px}
.menu nav a{font-size:22px;font-weight:700;padding:14px 4px;border-bottom:1px solid var(--white-15)}
.menu .btn{margin-top:28px}

/* ---------- full-screen panel ---------- */
.panel{position:relative;min-height:100svh;scroll-snap-align:start;display:flex;flex-direction:column;justify-content:space-between;
  text-align:center;overflow:hidden;isolation:isolate;
  padding-block:max(16vh,110px) 7vh;padding-left:var(--gutter);padding-right:var(--gutter-r)}
.panel.short{min-height:68svh;justify-content:flex-end;gap:28px;padding-block:140px 64px}
.scene{position:absolute;inset:0;z-index:-2;
  background:
    radial-gradient(circle at var(--sun-x,70%) var(--sun-y,38%),#FFF6E0 0,#FFD9A0 6%,rgba(255,170,90,.55) 18%,transparent 46%),
    linear-gradient(180deg,#7FA8C9 0%,var(--sky-pale) 52%,var(--sky-hot) 78%,#3B2A22 100%)}
.scene::after{content:"";position:absolute;left:0;right:0;bottom:0;height:34%;
  background:
    linear-gradient(90deg,transparent 0 3%,#1A1F28 3% 9%,transparent 9% 11%,#232A35 11% 15%,transparent 15% 22%,#1A1F28 22% 30%,transparent 30% 33%,#202733 33% 37%,transparent 37% 58%,#1D232E 58% 66%,transparent 66% 69%,#262D39 69% 76%,transparent 76% 80%,#1A1F28 80% 90%,transparent 90% 93%,#222935 93% 98%,transparent 98%) bottom/100% 72% no-repeat,
    linear-gradient(90deg,#222935 0 6%,transparent 6% 12%,#1D232E 12% 19%,transparent 19% 40%,#252C38 40% 52%,transparent 52% 84%,#1D232E 84% 100%) bottom/100% 100% no-repeat}
.tint{position:absolute;inset:0;z-index:-1;background:var(--ink);opacity:var(--tint,.5);transition:opacity .6s ease}
.mullion{position:absolute;inset:0;z-index:-1;pointer-events:none;
  background:linear-gradient(90deg,transparent calc(50% - 1px),rgba(255,255,255,.08) calc(50% - 1px) calc(50% + 1px),transparent calc(50% + 1px))}
.panel.plain{background:var(--navy);justify-content:center;gap:28px}

.eyebrow{font-family:var(--f-mono);font-size:12px;letter-spacing:.22em;text-transform:uppercase;color:var(--white-70)}
h1,h2,h3{font-family:var(--f-display);font-weight:800;letter-spacing:-.02em;margin:0;text-wrap:balance}
.panel h1{font-size:clamp(40px,7vw,84px);line-height:1.05;margin-top:10px}
.panel h2{font-size:clamp(36px,5.6vw,64px);line-height:1.05;margin-top:10px}
.sub{margin:14px auto 0;font-size:clamp(15px,1.6vw,18px);color:var(--white-70);max-width:36ch;line-height:1.6}
.heat{color:var(--heat)}

.bottom{display:flex;flex-direction:column;align-items:center;gap:26px}
.stats{display:flex;justify-content:center;gap:clamp(20px,5vw,64px);flex-wrap:wrap}
.stat b{display:block;font-family:var(--f-display);font-weight:600;font-size:clamp(26px,3.4vw,38px);font-variant-numeric:tabular-nums;letter-spacing:-.01em;line-height:1.2}
.stat span{font-size:12.5px;color:var(--white-70)}
.ctas{display:flex;gap:14px;flex-wrap:wrap;justify-content:center;width:100%}
.btn{display:inline-flex;align-items:center;justify-content:center;min-width:220px;padding:13px 24px;border-radius:6px;font-size:14px;font-weight:500;border:0;font-family:inherit;cursor:pointer;transition:background .2s,color .2s}
.btn-solid{background:var(--white);color:var(--ink)}
.btn-solid:hover{background:#E6E8EB}
.btn-ghost{background:rgba(255,255,255,.12);backdrop-filter:blur(6px);color:var(--white)}
.btn-ghost:hover{background:rgba(255,255,255,.22)}
.btn-ink{background:var(--ink);color:var(--white)}
.btn-ink:hover{background:var(--navy)}
.btn-line{background:transparent;color:var(--ink);box-shadow:inset 0 0 0 1.5px var(--ink)}
.btn-line:hover{background:var(--ink);color:var(--white)}
@media (max-width:520px){.btn{min-width:0;flex:1 1 100%}}

.chips{display:inline-flex;gap:6px;padding:5px;border-radius:999px;background:rgba(255,255,255,.1);backdrop-filter:blur(6px)}
.chip{border:0;background:transparent;color:var(--white-70);font-family:var(--f-mono);font-size:13px;padding:8px 16px;border-radius:999px;cursor:pointer}
.chip[aria-pressed="true"]{background:var(--white);color:var(--ink)}
.src{font-size:11px;color:var(--white-40);margin:0}
.scroll-hint{font-family:var(--f-mono);font-size:11px;letter-spacing:.2em;color:var(--white-40)}
.scroll-hint::after{content:"";display:block;width:1px;height:28px;margin:10px auto 0;background:var(--white-40)}
.on-light{color:var(--ink)}
.on-light .sub,.on-light .eyebrow{color:rgba(6,13,24,.7)}

/* ---------- sticky tabs (sub pages) ---------- */
.tabs{position:sticky;top:calc(env(safe-area-inset-top,0px) + 56px);z-index:40;background:rgba(245,246,248,.94);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);
  display:flex;justify-content:center;gap:4px;overflow-x:auto;padding-block:8px;padding-left:var(--gutter);padding-right:var(--gutter-r);scrollbar-width:none}
.tabs::-webkit-scrollbar{display:none}
.tabs a{flex:none;color:var(--mute);font-size:14px;font-weight:500;padding:8px 14px;border-radius:6px;white-space:nowrap}
.tabs a:hover{background:#E7EAEE;color:var(--ink)}

/* ---------- light content section ---------- */
.sec{background:var(--paper);color:var(--ink);padding-block:clamp(64px,10vw,120px);padding-left:var(--gutter);padding-right:var(--gutter-r)}
.sec.white{background:var(--white)}
.sec.dark{background:var(--ink);color:var(--white)}
.wrap{max-width:var(--maxw);margin:0 auto}
.sec-head{text-align:center;max-width:640px;margin:0 auto clamp(36px,5vw,56px)}
.sec-head .eyebrow{color:var(--heat-dark)}
.sec.dark .sec-head .eyebrow{color:var(--heat)}
.sec-head h2{font-size:clamp(28px,4vw,44px);line-height:1.15;margin-top:10px}
.sec-head p{color:var(--mute);margin:14px 0 0}
.sec.dark .sec-head p{color:var(--white-70)}

/* spec grid — label above big value */
.specs{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:28px 24px;text-align:center}
.specs div{min-width:0}
.specs b{display:block;font-family:var(--f-display);font-weight:600;font-size:clamp(26px,3.2vw,34px);font-variant-numeric:tabular-nums;line-height:1.2}
.specs span{font-size:13px;color:var(--mute)}
.sec.dark .specs span{color:var(--white-70)}

.table-wrap{overflow-x:auto;border-top:2px solid var(--ink)}
.sec.dark .table-wrap{border-top-color:var(--white)}
table.data{width:100%;border-collapse:collapse;font-size:14px;min-width:560px}
table.data th,table.data td{padding:14px 12px;border-bottom:1px solid var(--line);text-align:right;font-variant-numeric:tabular-nums}
table.data th:first-child,table.data td:first-child{text-align:left}
table.data thead th{font-family:var(--f-mono);font-size:12px;letter-spacing:.06em;color:var(--mute);font-weight:500}
table.data tbody th{font-weight:500}
table.data td{font-weight:600}
table.data.left td,table.data.left th{text-align:left}
.sec.dark table.data th,.sec.dark table.data td{border-bottom-color:rgba(255,255,255,.14)}
.sec.dark table.data thead th{color:var(--white-70)}
.note{font-size:12.5px;color:var(--mute);margin-top:14px;line-height:1.7}
.sec.dark .note{color:var(--white-40)}

.badge{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:500;color:var(--heat-dark);border:1px solid currentColor;border-radius:999px;padding:6px 14px}
.cert{display:flex;flex-direction:column;align-items:center;gap:6px;margin:40px auto 0;max-width:560px;text-align:center}
.cert small{font-size:12px;color:var(--mute);line-height:1.7}

/* grids */
.grid{display:grid;gap:1px;background:var(--line);border:1px solid var(--line)}
.grid.c2{grid-template-columns:repeat(2,1fr)}
.grid.c3{grid-template-columns:repeat(3,1fr)}
.grid > *{background:var(--white);padding:28px 24px;min-width:0}
.sec.white .grid > *{background:var(--paper)}
.grid h3{font-size:19px;margin-top:6px}
.grid p{color:var(--mute);font-size:14.5px;margin:8px 0 0}
.grid .k{font-family:var(--f-mono);font-size:12px;color:var(--heat-dark);letter-spacing:.1em}
.grid .tag{display:inline-block;margin-top:14px;font-size:13px;font-weight:600}
@media (max-width:860px){.grid.c3{grid-template-columns:repeat(2,1fr)}}
@media (max-width:560px){.grid.c2,.grid.c3{grid-template-columns:1fr}}

/* process steps */
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:0;counter-reset:s}
.steps div{padding:0 12px;text-align:center;position:relative}
.steps div::before{counter-increment:s;content:counter(s,decimal-leading-zero);display:block;font-family:var(--f-mono);font-size:12px;color:var(--heat-dark);margin-bottom:10px}
.steps b{display:block;font-size:16px}
.steps span{font-size:13px;color:var(--mute)}
.steps.c4{grid-template-columns:repeat(4,1fr)}
@media (max-width:760px){.steps,.steps.c4{grid-template-columns:repeat(2,1fr);gap:28px 0}}

/* FAQ */
.faq{max-width:780px;margin:0 auto;border-top:2px solid var(--ink)}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{list-style:none;cursor:pointer;padding:20px 40px 20px 4px;font-weight:500;position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:8px;top:16px;font-size:22px;font-weight:400;color:var(--mute)}
.faq details[open] summary::after{content:"−"}
.faq details p{margin:0;padding:0 4px 22px;color:var(--mute);font-size:15px}

/* forms */
.form-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:clamp(32px,6vw,72px);align-items:start}
@media (max-width:860px){.form-layout{grid-template-columns:1fr}}
.info-list{display:flex;flex-direction:column;gap:18px;margin-top:8px}
.info-list div{display:flex;flex-direction:column;gap:2px}
.info-list dt{font-family:var(--f-mono);font-size:12px;color:var(--mute);letter-spacing:.08em}
.info-list dd{margin:0;font-size:17px;font-weight:500;user-select:all}
.form{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form .full{grid-column:1/-1}
.field{display:flex;flex-direction:column;gap:6px;min-width:0}
.field label{font-size:13px;font-weight:500}
.field input,.field select,.field textarea{width:100%;font:inherit;font-size:15px;color:var(--ink);background:var(--white);border:1px solid var(--line);border-radius:6px;padding:12px 14px;transition:border-color .2s}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--ink)}
.field textarea{min-height:120px;resize:vertical}
.form .hint{grid-column:1/-1;font-size:12.5px;color:var(--mute);margin:0}
.form .hp{display:none}
.form .btn{grid-column:1/-1;width:100%}
.agree{grid-column:1/-1;display:flex;gap:10px;align-items:flex-start;font-size:13.5px;color:var(--mute)}
.agree input{margin-top:4px}
.agree a{text-decoration:underline}
@media (max-width:560px){.form{grid-template-columns:1fr}}

/* legal */
.legal-body{max-width:780px;margin:0 auto}
.legal-body h2{font-size:20px;margin:44px 0 12px;font-family:var(--f-body);font-weight:700;letter-spacing:0}
.legal-body h3{font-size:16px;margin:24px 0 8px;font-family:var(--f-body);font-weight:700;letter-spacing:0}
.legal-body p,.legal-body li{color:#36404C;font-size:15px}
.legal-body ul,.legal-body ol{padding-left:20px}
.legal-body table{width:100%;border-collapse:collapse;font-size:14px;margin:12px 0}
.legal-body th,.legal-body td{border:1px solid var(--line);padding:10px;text-align:left;vertical-align:top}
.legal-body th{background:var(--paper)}
.legal-body .toc{background:var(--paper);padding:20px 24px;border-radius:6px}
.legal-body .toc a{text-decoration:underline}
.legal-body .notice-box{border-left:3px solid var(--heat);background:var(--paper);padding:16px 20px;margin:20px 0}
.legal-body .updated{font-size:13px;color:var(--mute)}
.table-scroll{overflow-x:auto}

/* ---------- footer ---------- */
footer{scroll-snap-align:end;background:var(--ink);color:var(--white-40);font-size:12.5px;line-height:1.9;text-align:center;
  padding-block:44px calc(40px + env(safe-area-inset-bottom,0px));padding-left:var(--gutter);padding-right:var(--gutter-r)}
footer nav{display:flex;gap:6px 18px;justify-content:center;flex-wrap:wrap;margin-bottom:14px;font-size:13px}
footer nav a:hover{color:var(--white)}

/* motion */
.reveal{transition:opacity .8s ease,transform .8s ease}
.js .reveal:not(.in){opacity:.001;transform:translateY(14px)}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.tint,.reveal{transition:none}.js .reveal:not(.in){opacity:1;transform:none}}
.steps.nonum div::before{display:none}
[hidden]{display:none!important}
.menu .btn{flex:none}
.specs{grid-template-columns:repeat(3,1fr)}
.specs.c4{grid-template-columns:repeat(4,1fr)}
@media (max-width:640px){.specs,.specs.c4{grid-template-columns:repeat(2,1fr)}}
.greeting p{color:var(--white-70);font-size:16.5px;line-height:1.85;margin:0 0 18px;max-width:62ch}
.greeting .sign{margin-top:32px;color:var(--white);font-size:15px}
.greeting .sign b{font-family:var(--f-display);font-size:20px;margin-left:8px}

/* ---------- 시공사례 ---------- */
.filters{display:flex;flex-wrap:wrap;justify-content:center;gap:6px;margin-bottom:32px}
.filter{border:1px solid var(--line);background:var(--white);color:var(--mute);font:inherit;font-size:14px;padding:8px 16px;border-radius:999px;cursor:pointer}
.filter[aria-pressed="true"]{background:var(--ink);border-color:var(--ink);color:var(--white)}
.cases{display:grid;grid-template-columns:repeat(2,1fr);gap:32px 24px}
.case{min-width:0}
.case-img{position:relative;aspect-ratio:4/3;max-width:100%;overflow:hidden;border-radius:4px;background:var(--paper)}
.case-img img{width:100%;height:100%;object-fit:cover}
.case-before{position:absolute;inset:0;clip-path:inset(0 50% 0 0);transition:clip-path .5s ease}
.case-img:hover .case-before{clip-path:inset(0 100% 0 0)}
.case-ba{position:absolute;left:12px;bottom:12px;font-family:var(--f-mono);font-size:11px;letter-spacing:.1em;color:var(--white);background:rgba(6,13,24,.7);padding:4px 8px;border-radius:3px}
.case-body{padding-top:16px}
.case-body .k{font-family:var(--f-mono);font-size:12px;color:var(--heat-dark);letter-spacing:.1em}
.case-body h3{font-size:20px;margin-top:4px}
.case-meta{font-size:13px;color:var(--mute);margin:6px 0 0}
.case-body p{font-size:15px;color:#36404C;margin:10px 0 0}
.case-body details{margin-top:10px;font-size:14px}
.case-body summary{cursor:pointer;font-weight:500}
.case-body .tag{display:inline-block;margin-top:12px;font-size:14px;font-weight:600;color:var(--heat-dark)}
.empty{grid-column:1/-1;text-align:center;color:var(--mute);padding:40px 0;margin:0}
.posts{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.post{display:flex;flex-direction:column;background:var(--white);border-radius:4px;overflow:hidden;min-width:0;transition:transform .25s}
.post:hover{transform:translateY(-3px)}
.post img,.post-noimg{width:100%;aspect-ratio:16/10;object-fit:cover;background:var(--line)}
.post-body{padding:16px 18px 20px}
.post-date{font-family:var(--f-mono);font-size:12px;color:var(--mute)}
.post h3{font-size:16px;line-height:1.4;margin-top:6px;font-family:var(--f-body);font-weight:700;letter-spacing:0}
.post p{font-size:13.5px;color:var(--mute);margin:8px 0 0;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
@media (max-width:860px){.posts{grid-template-columns:repeat(2,1fr)}}
@media (max-width:560px){.cases,.posts{grid-template-columns:1fr}}
.grid p.hook{color:var(--ink);font-weight:700;font-size:15.5px;margin-top:10px}