/* ============================================================
   든든(DEUNDEUN) — 흑백 SpaceX 디자인 시스템 (DESIGN-spacex.md)
   순수 흑백. 액센트색 금지. 색은 사진(이미지)이 담당.
   ============================================================ */

/* ---- Fonts (self-host, 런타임 외부 CDN 금지) ---- */
@font-face{
  font-family:"Pretendard";
  src:url("/assets/fonts/Pretendard-Regular.woff2") format("woff2");
  font-weight:400; font-style:normal; font-display:swap;
}
@font-face{
  font-family:"Pretendard";
  src:url("/assets/fonts/Pretendard-Bold.woff2") format("woff2");
  font-weight:700; font-style:normal; font-display:swap;
}
@font-face{
  font-family:"Inter";
  src:url("/assets/fonts/Inter-400.woff2") format("woff2");
  font-weight:400; font-style:normal; font-display:swap;
}
@font-face{
  font-family:"Inter";
  src:url("/assets/fonts/Inter-700.woff2") format("woff2");
  font-weight:700; font-style:normal; font-display:swap;
}

/* ---- Tokens ---- */
:root{
  --black:#000000;
  --black-soft:#0a0a0a;
  --white:#ffffff;
  --white-mute:#f0f0fa;
  --muted:#5a5a5f;
  --hairline:#3a3a3f;

  --font-ko:"Pretendard",-apple-system,BlinkMacSystemFont,"Apple SD Gothic Neo","Malgun Gothic",sans-serif;
  --font-lat:"Inter","Pretendard",Arial,sans-serif;

  --r-xs:4px; --r-sm:8px; --r-pill:32px;

  --maxw:1200px;
  --nav-h:64px;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--black);
  color:var(--white);
  font-family:var(--font-ko);
  font-size:16px;
  line-height:1.7;
  letter-spacing:.01em;
  word-break:keep-all;
  overflow-wrap:anywhere;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;cursor:pointer;}
:focus-visible{outline:2px solid var(--white);outline-offset:3px;}

/* ---- Latin micro-labels (uppercase + wide tracking) ---- */
.lat{font-family:var(--font-lat);}
.eyebrow{
  font-family:var(--font-lat);
  font-size:12px;font-weight:400;line-height:2;
  letter-spacing:.16em;text-transform:uppercase;
  color:var(--white-mute);
}
.eyebrow.mute{color:var(--muted);}

/* ---- Display typography (stairstep 80→60→48) ---- */
.display-xxl,.display-xl,.display-lg{
  font-family:var(--font-ko);
  font-weight:700;
  letter-spacing:-.01em; /* 한글 트래킹 완화(uppercase 금지) */
  margin:0;
}
.display-xxl{font-size:clamp(40px,7vw,80px);line-height:1.0;}
.display-xl{font-size:clamp(34px,5vw,60px);line-height:1.12;}
.display-lg{font-size:clamp(28px,4vw,48px);line-height:1.18;}
/* 라틴 디스플레이는 대문자+양수 트래킹 */
.display-xxl.lat,.display-xl.lat,.display-lg.lat{
  font-family:var(--font-lat);text-transform:uppercase;letter-spacing:.02em;
}

.lead{font-size:clamp(16px,1.4vw,19px);line-height:1.7;color:var(--white-mute);}
.muted{color:var(--muted);}

.container{max-width:var(--maxw);margin:0 auto;padding:0 24px;}

/* ============================================================
   NAV — 투명 오버레이 고정, 흰 uppercase
   ============================================================ */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  display:flex;align-items:center;justify-content:space-between;
  padding:18px 32px;min-height:var(--nav-h);
  background:transparent;
  transition:background .25s ease,border-color .25s ease;
  border-bottom:1px solid transparent;
}
.nav.scrolled{
  background:rgba(0,0,0,.72);
  backdrop-filter:saturate(140%) blur(8px);
  -webkit-backdrop-filter:saturate(140%) blur(8px);
  border-bottom:1px solid var(--hairline);
}
.brand{display:flex;flex-direction:column;line-height:1;gap:3px;}
.brand .wordmark{
  font-family:var(--font-lat);font-weight:700;font-size:18px;
  letter-spacing:.18em;text-transform:uppercase;color:var(--white);
}
.brand .tag{
  font-family:var(--font-lat);font-weight:400;font-size:9px;
  letter-spacing:.22em;text-transform:uppercase;color:var(--muted);
}
/* 회사 로고 — 다크 캔버스용 흰색-투명 버전(logo-white.png), 흑백 디자인 일관 */
.brand-logo{display:block;height:30px;width:auto;}
.footer .brand-logo{height:30px;}
.nav-links{display:flex;align-items:center;gap:28px;list-style:none;margin:0;padding:0;}
.nav-links a{
  font-family:var(--font-lat);font-size:12px;font-weight:400;
  letter-spacing:.14em;text-transform:uppercase;color:var(--white);
  padding:6px 0;position:relative;
}
.nav-links a:hover,.nav-links a.active{color:var(--white);}
.nav-links a.active::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;background:var(--white);
}
.nav-toggle{
  display:none;background:none;border:none;padding:8px;width:42px;height:42px;
}
.nav-toggle span{display:block;width:22px;height:1.5px;background:var(--white);margin:5px 0;transition:.25s;}

/* ---- 우측 클러스터 + 언어 전환 (지구본 + 드롭다운) ---- */
.nav-right{display:flex;align-items:center;gap:24px;}
.lang{position:relative;}
.lang-btn{display:inline-flex;align-items:center;gap:6px;background:none;border:1px solid var(--hairline);border-radius:var(--r-pill);color:var(--white);padding:6px 11px;font-family:var(--font-lat);font-size:11px;font-weight:700;letter-spacing:.1em;line-height:1;cursor:pointer;transition:border-color .2s ease;}
.lang-btn:hover{border-color:var(--white);}
.lang-btn svg{display:block;}
.lang-caret{font-size:8px;opacity:.75;}
.lang-menu{position:absolute;right:0;top:calc(100% + 10px);min-width:144px;list-style:none;margin:0;padding:6px;background:rgba(10,10,10,.98);border:1px solid var(--hairline);border-radius:var(--r-sm);opacity:0;transform:translateY(-6px);pointer-events:none;transition:.18s ease;}
.lang.open .lang-menu{opacity:1;transform:translateY(0);pointer-events:auto;}
.lang-menu a{display:block;padding:9px 12px;color:var(--white-mute);font-size:13px;text-decoration:none;border-radius:4px;letter-spacing:0;text-transform:none;}
.lang-menu a:hover{background:var(--hairline);color:var(--white);}
.lang-menu a.on{color:var(--white);font-weight:700;}
@media(max-width:768px){.nav-right{gap:10px;}}

@media(max-width:768px){
  .nav{padding:14px 20px;}
  .nav-toggle{display:block;}
  .nav-links{
    position:fixed;inset:var(--nav-h) 0 auto 0;flex-direction:column;gap:0;
    background:rgba(0,0,0,.96);border-bottom:1px solid var(--hairline);
    padding:8px 0;transform:translateY(-12px);opacity:0;pointer-events:none;
    transition:.22s ease;
  }
  .nav-links.open{transform:translateY(0);opacity:1;pointer-events:auto;}
  .nav-links li{width:100%;}
  .nav-links a{display:block;padding:16px 24px;border-bottom:1px solid var(--hairline);font-size:13px;}
  .nav-links li:last-child a{border-bottom:none;}
  .nav-links a.active::after{display:none;}
}

/* ============================================================
   CTA — 고스트 필 (투명 + 1px 흰 보더 + pill + uppercase)
   ============================================================ */
.btn-ghost{
  display:inline-flex;align-items:center;gap:10px;
  background:transparent;color:var(--white);
  border:1px solid var(--white);border-radius:var(--r-pill);
  padding:16px 28px;
  font-family:var(--font-lat);font-size:13px;font-weight:700;
  letter-spacing:.1em;text-transform:uppercase;
  transition:background .2s ease,color .2s ease;
}
.btn-ghost:hover{background:var(--white);color:var(--black);}
.btn-ghost .chev{font-size:15px;line-height:1;}
.link-underline{
  display:inline-flex;align-items:center;gap:8px;color:var(--white);
  font-family:var(--font-lat);font-size:13px;font-weight:400;letter-spacing:.08em;
  text-transform:uppercase;border-bottom:1px solid var(--white);padding-bottom:3px;
  transition:opacity .2s ease;
}
.link-underline:hover{opacity:.7;}

/* ============================================================
   FULL-BLEED PHOTO BANDS
   이미지를 어둡게 그레이딩(brightness ~.5) 후 흰 타이포
   ============================================================ */
.band{position:relative;overflow:hidden;}
.band-media{position:absolute;inset:0;z-index:0;}
.band-media img{
  width:100%;height:100%;object-fit:cover;
  filter:brightness(.5);
}
.band-inner{position:relative;z-index:2;}

/* 외부 공개도메인 이미지 출처 캡션 (이미지 하단 작게) */
.img-credit{
  position:absolute;right:10px;bottom:9px;z-index:4;
  font-family:var(--font-lat);font-size:10px;line-height:1;letter-spacing:.03em;
  color:rgba(255,255,255,.62);background:rgba(0,0,0,.42);
  padding:4px 8px;border-radius:3px;pointer-events:none;
}

/* HERO */
.hero{
  min-height:100vh;display:flex;align-items:flex-end;
  padding-bottom:72px;
}
.hero .band-inner{padding-top:calc(var(--nav-h) + 24px);width:100%;}
.hero h1{max-width:18ch;margin:18px 0 0;}
.hero .lead{max-width:54ch;margin:22px 0 0;}
.hero .cta-row{display:flex;align-items:center;gap:24px;flex-wrap:wrap;margin-top:34px;}

/* Generic page hero (shorter) */
.page-hero{min-height:62vh;display:flex;align-items:flex-end;padding-bottom:54px;}
.page-hero .band-inner{padding-top:calc(var(--nav-h) + 24px);width:100%;}
.page-hero h1{margin:14px 0 0;}
.page-hero .lead{max-width:60ch;margin:18px 0 0;}

/* ============================================================
   SECTIONS
   ============================================================ */
.section{padding:88px 0;background:var(--black);}
.section.soft{background:var(--black-soft);}
.section-head{margin-bottom:48px;max-width:62ch;}
.section-head h2{margin:14px 0 0;}
.section-head p{margin:16px 0 0;}

/* ---- Metrics (핵심지표) ---- */
.metrics{
  display:grid;grid-template-columns:repeat(4,1fr);gap:1px;
  background:var(--hairline);border:1px solid var(--hairline);
}
.metric{background:var(--black);padding:34px 24px;}
.metric .num{
  font-family:var(--font-lat);font-weight:700;
  font-size:clamp(34px,4vw,52px);line-height:1;letter-spacing:.01em;
  font-variant-numeric:tabular-nums;color:var(--white);
}
.metric .label{margin-top:12px;font-size:13px;color:var(--muted);}
@media(max-width:768px){.metrics{grid-template-columns:repeat(2,1fr);}}

/* ---- Card grid ---- */
.grid{display:grid;gap:1px;background:var(--hairline);border:1px solid var(--hairline);}
.grid.cols-3{display:flex;flex-wrap:wrap;}
.grid.cols-3>*{flex:1 1 calc(33.333% - 2px);}
.grid.cols-2{grid-template-columns:repeat(2,1fr);}
@media(max-width:960px){.grid.cols-3>*{flex-basis:calc(50% - 1px);}}
@media(max-width:600px){.grid.cols-3>*{flex-basis:100%;}.grid.cols-2{grid-template-columns:1fr;}}

/* 도메인 그리드: D1 상단 전체폭 배너 + 나머지(D2~D7) 2열 */
#domainGrid{display:grid;grid-template-columns:repeat(2,1fr);}
#domainGrid>:first-child{grid-column:1 / -1;min-height:360px;}
@media(max-width:600px){#domainGrid{grid-template-columns:1fr;}}

/* Plain card (no image) */
.card{
  background:var(--black-soft);border:1px solid var(--hairline);border-radius:var(--r-sm);
  padding:26px;transition:border-color .2s ease;
}
.card:hover{border-color:var(--muted);}

/* Photo card (domain / featured / capability) */
.photo-card{
  position:relative;display:flex;flex-direction:column;justify-content:flex-end;
  min-height:300px;background:var(--black-soft);overflow:hidden;
  border:1px solid var(--hairline);text-decoration:none;color:var(--white);
  transition:border-color .2s ease;
}
.photo-card:hover{border-color:var(--white);}
.photo-card .pc-media{position:absolute;inset:0;z-index:0;}
.photo-card .pc-media img{width:100%;height:100%;object-fit:cover;filter:brightness(.46);transition:filter .3s ease,transform .4s ease;}
.photo-card:hover .pc-media img{filter:brightness(.58);transform:scale(1.03);}
.photo-card .pc-canvas{position:absolute;inset:0;z-index:0;background:var(--black-soft);}
.photo-card .pc-body{position:relative;z-index:2;padding:26px;}
.photo-card .pc-code{display:block;font-family:var(--font-lat);font-size:12px;font-weight:700;letter-spacing:.16em;color:var(--white-mute);}
.photo-card .pc-title{display:block;font-size:21px;font-weight:700;line-height:1.3;margin:8px 0 0;}
.photo-card .pc-desc{display:block;font-size:14px;color:var(--white-mute);margin:10px 0 0;line-height:1.6;}
.photo-card .pc-arrow{display:block;margin-top:18px;font-family:var(--font-lat);font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--white);}

/* ---- Capability flow (설계→해석→제작→구축→시험평가) ---- */
.flow{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-bottom:54px;}
.flow .step{
  border:1px solid var(--hairline);border-radius:var(--r-pill);
  padding:12px 22px;font-size:14px;color:var(--white);background:var(--black-soft);
}
.flow .arrow{color:var(--muted);font-family:var(--font-lat);}

/* ---- Client chips ---- */
.chips{display:flex;flex-wrap:wrap;gap:12px;}
.chip{
  border:1px solid var(--hairline);border-radius:var(--r-pill);
  padding:12px 22px;font-size:14px;color:var(--white-mute);background:var(--black-soft);
}

/* ============================================================
   PROJECTS — 탭 + 필터 + 카드
   ============================================================ */
.tabs{
  display:flex;flex-wrap:wrap;gap:0;border-bottom:1px solid var(--hairline);
  margin-bottom:28px;
}
.tab{
  background:transparent;border:none;color:var(--muted);
  padding:14px 18px;font-size:13px;letter-spacing:.02em;
  border-bottom:2px solid transparent;margin-bottom:-1px;transition:.2s;
  white-space:nowrap;
}
.tab .tcode{font-family:var(--font-lat);font-weight:700;letter-spacing:.1em;margin-right:7px;}
.tab:hover{color:var(--white);}
.tab.active{color:var(--white);border-bottom-color:var(--white);}

.filters{
  display:flex;flex-wrap:wrap;gap:18px;align-items:flex-end;
  padding:22px 0 26px;border-bottom:1px solid var(--hairline);margin-bottom:30px;
}
.filter{display:flex;flex-direction:column;gap:7px;}
.filter label{
  font-family:var(--font-lat);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);
}
.filter select{
  background:var(--black-soft);color:var(--white);
  border:1px solid var(--hairline);border-radius:var(--r-xs);
  padding:11px 14px;font-family:var(--font-ko);font-size:14px;min-width:160px;
}
.filter select:hover{border-color:var(--muted);}
.result-count{margin-left:auto;font-size:13px;color:var(--muted);align-self:flex-end;}

.proj-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--hairline);border:1px solid var(--hairline);}
@media(max-width:960px){.proj-grid{grid-template-columns:repeat(2,1fr);}}
@media(max-width:600px){.proj-grid{grid-template-columns:1fr;}}
/* 진행 중 사업: 항목 수(2)에 맞춰 2열 — 빈 셀(회색 박스) 방지 */
#ongoing{grid-template-columns:repeat(2,1fr);}
@media(max-width:600px){#ongoing{grid-template-columns:1fr;}}

.proj{background:var(--black-soft);padding:26px;display:flex;flex-direction:column;gap:14px;transition:border-color .2s;border:1px solid transparent;}
.proj:hover{border-color:var(--hairline);}
.proj-top{display:flex;align-items:center;justify-content:space-between;gap:12px;}
.proj .doms{font-family:var(--font-lat);font-size:11px;font-weight:700;letter-spacing:.12em;color:var(--muted);}
.proj h3{font-size:17px;font-weight:700;line-height:1.4;margin:0;}
.proj .summary{font-size:14px;color:var(--white-mute);line-height:1.6;margin:0;flex:1;}
.proj-meta{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-top:4px;}
.badge{
  font-family:var(--font-lat);font-size:11px;letter-spacing:.08em;text-transform:uppercase;
  padding:5px 11px;border-radius:var(--r-pill);border:1px solid var(--hairline);
}
.badge.ongoing{color:var(--black);background:var(--white);border-color:var(--white);font-weight:700;}
.badge.done{color:var(--muted);}
.badge.type{color:var(--white-mute);}
.proj .period{font-family:var(--font-lat);font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums;}
.proj .client{font-size:13px;color:var(--muted);}

.empty{
  grid-column:1/-1;background:var(--black-soft);border:1px dashed var(--hairline);
  padding:64px 24px;text-align:center;color:var(--muted);font-size:15px;
}

/* ============================================================
   ABOUT — timeline / info
   ============================================================ */
.info-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--hairline);border:1px solid var(--hairline);}
.info-grid .info:last-child{grid-column:1 / -1;}
@media(max-width:600px){.info-grid{grid-template-columns:1fr;}}
.info{background:var(--black);padding:26px;}
.info .k{font-family:var(--font-lat);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);}
.info .v{margin-top:8px;font-size:16px;color:var(--white);}

.timeline{list-style:none;margin:0;padding:0;border-left:1px solid var(--hairline);}
.timeline li{position:relative;padding:0 0 34px 28px;}
.timeline li:last-child{padding-bottom:0;}
.timeline li::before{content:"";position:absolute;left:-5px;top:6px;width:9px;height:9px;border-radius:50%;background:var(--white);}
.timeline .date{font-family:var(--font-lat);font-size:13px;font-weight:700;letter-spacing:.06em;color:var(--white);font-variant-numeric:tabular-nums;}
.timeline .text{margin-top:6px;font-size:15px;color:var(--white-mute);}

/* ============================================================
   CONTACT
   ============================================================ */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;}
@media(max-width:768px){.contact-grid{grid-template-columns:1fr;}}
.contact-list{list-style:none;margin:0;padding:0;}
.contact-list li{padding:20px 0;border-bottom:1px solid var(--hairline);}
.contact-list li:first-child{padding-top:0;}
.contact-list .k{font-family:var(--font-lat);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);}
.contact-list .v{margin-top:8px;font-size:17px;color:var(--white);}
.contact-list .v a:hover{border-bottom:1px solid var(--white);}

.form label{display:block;font-family:var(--font-lat);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin:0 0 8px;}
.form .field{margin-bottom:20px;}
.form input,.form textarea{
  width:100%;background:var(--black-soft);color:var(--white);
  border:1px solid var(--hairline);border-radius:var(--r-xs);
  padding:13px 15px;font-family:var(--font-ko);font-size:15px;
}
.form input:focus,.form textarea:focus{border-color:var(--white);outline:none;}
.form textarea{min-height:140px;resize:vertical;}

/* ============================================================
   FOOTER — 다크 + 마이크로캡
   ============================================================ */
.footer{background:var(--black);border-top:1px solid var(--hairline);padding:56px 0 40px;}
.footer-top{display:flex;justify-content:space-between;gap:40px;flex-wrap:wrap;margin-bottom:40px;}
.footer .brand .wordmark{font-size:16px;}
.footer-cols{display:flex;gap:64px;flex-wrap:wrap;}
.footer-col h4{font-family:var(--font-lat);font-size:11px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:var(--muted);margin:0 0 14px;}
.footer-col ul{list-style:none;margin:0;padding:0;}
.footer-col li{margin-bottom:10px;}
.footer-col a,.footer-col span{font-size:13px;color:var(--white-mute);}
.footer-col a:hover{color:var(--white);}
.footer-bottom{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-top:26px;border-top:1px solid var(--hairline);}
.footer-bottom span{font-size:12px;color:var(--muted);font-family:var(--font-lat);letter-spacing:.04em;}

/* ---- utility ---- */
.mt-s{margin-top:18px;}.mt-m{margin-top:34px;}.mt-l{margin-top:54px;}
.center{text-align:center;}
.divider{height:1px;background:var(--hairline);border:none;margin:0;}
[hidden]{display:none !important;}