*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,Arial,"Noto Sans KR",sans-serif;color:#102a5c;background:#fff;line-height:1.6}.container{width:min(1180px,calc(100% - 44px));margin:auto}.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.97);border-bottom:1px solid #e6edf7;backdrop-filter:blur(12px)}.header-inner{height:80px;display:flex;align-items:center}.brand img{width:215px;display:block}.main-nav{margin-left:auto;display:flex;gap:36px}.main-nav a{font-size:14px;font-weight:700;color:#102a5c;text-decoration:none;transition:.2s}.main-nav a:hover{color:#1e40af}.menu-toggle{display:none;margin-left:auto;border:0;background:none;font-size:26px;color:#1e40af}.hero{position:relative;min-height:680px;background:#061d4d;overflow:hidden}.hero-image{position:absolute;inset:0;background-position:center;background-size:cover;background-repeat:no-repeat}.hero-shade{position:absolute;inset:0;background:linear-gradient(90deg,rgba(3,23,60,.96) 0%,rgba(7,37,86,.82) 36%,rgba(10,39,81,.28) 67%,rgba(4,26,66,.06) 100%)}.hero-inner{position:relative;z-index:2;min-height:680px;display:flex;align-items:center}.hero-copy{max-width:670px;color:#fff;padding:70px 0}.hero-kicker{letter-spacing:8px;font-size:14px;font-weight:800;color:#38bdf8;margin:0 0 18px}.hero h1{margin:0 0 26px;font-size:clamp(48px,6.2vw,82px);line-height:.98;letter-spacing:-3.5px;font-weight:800}.hero h1::after{content:".";color:#38bdf8}.hero-message{font-size:21px;color:#eef5ff;margin:0 0 36px}.hero-link{display:inline-block;color:#fff;text-decoration:none;border-bottom:1px solid rgba(255,255,255,.55);padding-bottom:5px;font-weight:700}.section{padding:100px 0}.section-light{background:#f7faff}.section-heading{max-width:720px;margin-bottom:44px}.eyebrow{font-size:12px;font-weight:800;letter-spacing:2.4px;color:#1e40af;margin:0 0 8px}.section h2{margin:0;font-size:46px;line-height:1.12;letter-spacing:-1.6px}.section-desc{font-size:17px;color:#69788f;margin-top:18px}.leader-card{background:#fff;border:1px solid #e2eaf5;border-radius:24px;padding:38px;box-shadow:0 16px 44px rgba(16,42,92,.08)}.leader-title{display:flex;gap:22px;align-items:center;margin-bottom:34px}.leader-mark{width:72px;height:72px;border-radius:20px;display:grid;place-items:center;background:linear-gradient(135deg,#1e40af,#38bdf8);color:#fff;font-size:22px;font-weight:800}.leader-title h3{margin:0 0 4px;font-size:29px}.leader-title p{margin:0;color:#69788f}.leader-highlights{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.leader-item{border-top:1px solid #e3eaf5;padding:20px 0}.leader-item span{color:#1e40af;font-size:13px;font-weight:800}.leader-item p{margin:7px 0 0;color:#33496d;font-size:16px}.company-strength{margin-top:26px;padding:24px 26px;border-radius:16px;background:#0e2b67;color:#fff;display:grid;gap:6px}.company-strength span{font-size:11px;letter-spacing:2px;color:#86dcfb;font-weight:800}.company-strength strong{font-size:18px}.strategy-section{background:#0d2c6b;color:#fff;position:relative;overflow:hidden}.strategy-section::after{content:"";position:absolute;width:520px;height:520px;border-radius:50%;right:-130px;top:-170px;background:radial-gradient(circle,rgba(56,189,248,.2),rgba(56,189,248,0) 70%)}.section-heading-light{position:relative;z-index:1}.eyebrow-light{color:#60d2f6}.strategy-section h2{font-size:56px}.strategy-quote{font-size:21px;color:#dfeaff;margin-top:18px}.strategy-grid{position:relative;z-index:1;display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.strategy-card{min-height:250px;border-radius:20px;padding:28px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.13);backdrop-filter:blur(8px)}.strategy-number{font-size:14px;color:#63d8fb;font-weight:800;margin-bottom:36px}.strategy-label{font-size:12px;letter-spacing:1.5px;color:#75ddfb;font-weight:800}.strategy-card h3{font-size:24px;margin:8px 0 14px}.strategy-card p{color:#d2dded;margin:0}.platform-section{background:#fff}.technology-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}.technology-card{border:1px solid #e2e9f4;border-radius:24px;padding:32px;display:flex;gap:24px;min-height:330px;box-shadow:0 14px 38px rgba(18,48,99,.06)}.tech-badge{width:72px;height:72px;flex:0 0 72px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(145deg,#1e40af,#38bdf8);color:#fff;font-weight:800}.tech-subtitle{margin:1px 0 6px;color:#38a9de;font-size:12px;font-weight:800;letter-spacing:1.2px;text-transform:uppercase}.technology-card h3{margin:0 0 25px;font-size:27px}.tech-points{display:grid;gap:18px}.tech-point{padding-top:18px;border-top:1px solid #e7edf6}.tech-point strong{color:#1e40af}.tech-point p{margin:5px 0 0;color:#66758c}.site-footer{background:#071b45;color:#b9c8df;padding:28px 0;font-size:13px}.footer-inner{display:flex;justify-content:space-between;gap:20px}

@media(max-width:900px){.main-nav{display:none}.main-nav.open{display:flex;position:absolute;top:80px;left:0;right:0;flex-direction:column;background:#fff;padding:24px 30px;border-bottom:1px solid #e5ebf5;gap:18px}.menu-toggle{display:block}.hero,.hero-inner{min-height:600px}.hero-shade{background:linear-gradient(90deg,rgba(3,23,60,.96),rgba(5,29,68,.62))}.leader-highlights,.strategy-grid,.technology-grid{grid-template-columns:1fr}.technology-card{min-height:auto}.section{padding:78px 0}}
@media(max-width:620px){.container{width:min(100% - 28px,1180px)}.header-inner{height:68px}.brand img{width:175px}.main-nav.open{top:68px}.hero,.hero-inner{min-height:560px}.hero-copy{padding:48px 0}.hero h1{font-size:48px;letter-spacing:-2px}.hero-message{font-size:18px}.section{padding:64px 0}.section h2,.strategy-section h2{font-size:37px}.leader-card{padding:24px}.leader-title{align-items:flex-start}.leader-highlights{grid-template-columns:1fr}.technology-card{padding:24px;flex-direction:column}.footer-inner{flex-direction:column}}


/* ===== Expanded Leadership Section ===== */
.leadership-heading{
  max-width:900px;
  margin-bottom:48px;
}
.leadership-intro-title{
  margin:28px 0 16px;
  font-size:28px;
  line-height:1.3;
  color:#16336f;
}
.leadership-intro-copy{
  display:grid;
  gap:14px;
}
.leadership-intro-copy p{
  margin:0;
  color:#5f6f88;
  font-size:17px;
  line-height:1.75;
}
.leadership-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:22px;
}
.leader-profile{
  background:#fff;
  border:1px solid #e2eaf5;
  border-radius:22px;
  padding:30px;
  box-shadow:0 14px 38px rgba(16,42,92,.07);
}
.leader-profile-top{
  display:flex;
  gap:16px;
  align-items:flex-start;
  padding-bottom:20px;
  margin-bottom:20px;
  border-bottom:1px solid #e7edf6;
}
.leader-avatar{
  width:46px;
  height:46px;
  flex:0 0 46px;
  border-radius:14px;
  display:grid;
  place-items:center;
  background:linear-gradient(135deg,#1e40af,#38bdf8);
  color:#fff;
  font-weight:800;
  font-size:13px;
  letter-spacing:1px;
}
.leader-profile h3{
  margin:0 0 7px;
  font-size:21px;
  line-height:1.3;
  color:#102a5c;
}
.leader-role{
  margin:0;
  color:#1e40af;
  font-size:13px;
  line-height:1.45;
  font-weight:800;
}
.leader-profile-body{
  display:grid;
  gap:14px;
}
.leader-profile-body p{
  margin:0;
  color:#627189;
  font-size:15px;
  line-height:1.7;
}

@media(max-width:1050px){
  .leadership-grid{grid-template-columns:1fr}
}
@media(max-width:620px){
  .leadership-intro-title{font-size:23px}
  .leadership-intro-copy p{font-size:16px}
  .leader-profile{padding:22px}
}


/* ===== Development Roadmap ===== */
.roadmap-section{
  background:#f8fbff;
}
.roadmap-card{
  background:#ffffff;
  border:1px solid #dfe8f4;
  border-radius:22px;
  padding:18px;
  box-shadow:0 16px 36px rgba(16,42,92,.06);
}
.roadmap-card img{
  display:block;
  width:100%;
  height:auto;
  border-radius:14px;
}


/* ===== Header / Logo hardening ===== */
.site-header{
  background:#ffffff;
  overflow:visible;
}
.header-inner{
  height:80px;
  display:flex;
  align-items:center;
}
.brand{
  display:flex;
  align-items:center;
  height:100%;
  flex:0 0 auto;
  overflow:hidden;
}
.brand img{
  display:block;
  width:auto !important;
  height:auto !important;
  max-width:260px !important;
  max-height:58px !important;
  object-fit:contain;
}
@media(max-width:620px){
  .header-inner{height:68px;}
  .brand img{
    max-width:205px !important;
    max-height:48px !important;
  }
}


/* ===== Hero image crop behavior =====
   Keep the TOP of the hero image visible.
   When the image must be cropped, crop primarily from the BOTTOM.
*/
.hero-image{
  background-size:cover;
  background-position:center top !important;
  background-repeat:no-repeat;
}

/* Tablet / mobile: also keep the subject and upper image area visible */
@media(max-width:900px){
  .hero-image{
    background-position:42% top !important;
  }
}
@media(max-width:620px){
  .hero-image{
    background-position:38% top !important;
  }
}


/* ===== Clean roadmap presentation =====
   No surrounding card/background/shadow. The roadmap image itself is the visual.
*/
.roadmap-card{
  background:transparent !important;
  border:0 !important;
  border-radius:0 !important;
  padding:0 !important;
  box-shadow:none !important;
  overflow:visible !important;
}
.roadmap-card img{
  width:100%;
  height:auto;
  border-radius:0 !important;
  display:block;
}


/* ===== Contact Us ===== */
.nav-contact{
  padding:9px 16px;
  border-radius:10px;
  background:#102a5c;
  color:#ffffff !important;
}
.nav-contact:hover{
  background:#1e40af;
  color:#ffffff !important;
}

.contact-section{
  background:#0b2558;
  color:#ffffff;
}
.contact-layout{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:72px;
  align-items:start;
}
.contact-section h2{
  color:#ffffff;
  margin:6px 0 16px;
}
.contact-intro{
  max-width:560px;
  margin:0;
  color:#cdd9eb;
  font-size:17px;
}
.contact-details{
  display:grid;
  gap:18px;
}
.contact-item{
  padding:24px 0;
  border-top:1px solid rgba(255,255,255,.18);
}
.contact-item:first-child{
  border-top:0;
  padding-top:0;
}
.contact-label{
  display:block;
  margin-bottom:6px;
  color:#69d4f4;
  font-size:12px;
  font-weight:800;
  letter-spacing:1.7px;
  text-transform:uppercase;
}
.contact-item a,
.contact-item p{
  margin:0;
  color:#ffffff;
  font-size:18px;
  line-height:1.6;
  text-decoration:none;
}
.contact-item a:hover{
  color:#69d4f4;
}

@media(max-width:900px){
  .nav-contact{
    display:inline-flex;
    width:max-content;
  }
  .contact-layout{
    grid-template-columns:1fr;
    gap:38px;
  }
}


/* ===== Header navigation alignment fix ===== */
.site-header{
  background:#ffffff;
}

.header-inner{
  height:88px;
  display:flex;
  align-items:center;
  gap:32px;
}

.brand{
  display:flex;
  align-items:center;
  height:100%;
  flex:0 0 auto;
}

.brand img{
  display:block;
  width:auto !important;
  height:auto !important;
  max-width:260px !important;
  max-height:58px !important;
  object-fit:contain;
}

.main-nav{
  margin-left:auto;
  display:flex;
  align-items:center;
  justify-content:flex-end;
  gap:38px;
  height:100%;
}

.main-nav a{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  height:44px;
  margin:0;
  padding:0;
  line-height:1;
  white-space:nowrap;
  font-size:14px;
  font-weight:700;
  color:#102a5c;
  text-decoration:none;
}

.main-nav .nav-contact{
  height:44px;
  padding:0 20px;
  margin-left:4px;
  border-radius:11px;
  background:#102a5c;
  color:#ffffff !important;
}

.main-nav .nav-contact:hover{
  background:#1e40af;
  color:#ffffff !important;
}

/* Tablet */
@media(max-width:1050px){
  .main-nav{
    gap:24px;
  }
  .main-nav a{
    font-size:13px;
  }
  .main-nav .nav-contact{
    padding:0 16px;
  }
}

/* Mobile */
@media(max-width:900px){
  .header-inner{
    height:72px;
  }

  .brand img{
    max-width:205px !important;
    max-height:48px !important;
  }

  .main-nav{
    height:auto;
  }

  .main-nav.open{
    top:72px;
    align-items:flex-start;
    justify-content:flex-start;
    gap:12px;
  }

  .main-nav.open a{
    height:auto;
    min-height:42px;
    justify-content:flex-start;
    width:100%;
    padding:0 4px;
  }

  .main-nav.open .nav-contact{
    width:auto;
    min-height:42px;
    padding:0 18px;
    justify-content:center;
    margin:6px 0 0;
  }
}


/* ======================================================
   FINAL RESPONSIVE OPTIMIZATION
   Desktop / Tablet / Mobile
   ====================================================== */

html{
  -webkit-text-size-adjust:100%;
}

body{
  overflow-x:hidden;
}

/* Safer responsive container */
.container{
  width:min(1180px, calc(100% - 48px));
}

/* Header */
.site-header{
  width:100%;
}

.header-inner{
  min-height:88px;
}

.menu-toggle{
  flex:0 0 auto;
}

/* Hero */
.hero,
.hero-inner{
  min-height:clamp(520px, 64vw, 680px);
}

.hero-copy{
  width:min(660px, 58vw);
}

.hero h1{
  font-size:clamp(46px, 5.4vw, 78px);
  overflow-wrap:normal;
  word-break:normal;
}

.hero-message{
  max-width:620px;
}

/* Leadership */
.leadership-grid{
  align-items:stretch;
}

.leader-profile{
  height:100%;
}

/* Strategy / technology */
.strategy-grid,
.technology-grid{
  align-items:stretch;
}

/* Roadmap desktop */
.roadmap-card{
  width:100%;
}

.roadmap-card img{
  width:100%;
  height:auto;
  max-width:none;
}

/* Contact */
.contact-item p{
  overflow-wrap:anywhere;
}

/* -------- Tablet landscape / small desktop -------- */
@media (max-width:1100px){
  .container{
    width:min(100% - 40px, 1040px);
  }

  .header-inner{
    gap:22px;
  }

  .main-nav{
    gap:20px;
  }

  .main-nav a{
    font-size:13px;
  }

  .brand img{
    max-width:220px !important;
  }

  .hero-copy{
    width:min(610px, 62vw);
  }

  .hero h1{
    font-size:clamp(44px, 5.5vw, 68px);
  }

  .leadership-grid{
    grid-template-columns:1fr;
  }

  .strategy-grid{
    grid-template-columns:repeat(3, 1fr);
  }
}

/* -------- iPad portrait / tablets -------- */
@media (max-width:900px){
  .container{
    width:min(100% - 32px, 820px);
  }

  .header-inner{
    min-height:72px;
    height:72px;
  }

  .brand img{
    max-width:200px !important;
    max-height:46px !important;
  }

  .menu-toggle{
    display:block;
    font-size:28px;
  }

  .main-nav{
    display:none;
  }

  .main-nav.open{
    position:absolute;
    top:72px;
    left:0;
    right:0;
    z-index:120;
    display:flex;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:12px 20px 20px;
    background:#fff;
    border-bottom:1px solid #e4eaf4;
    box-shadow:0 12px 26px rgba(16,42,92,.08);
  }

  .main-nav.open a{
    width:100%;
    min-height:48px;
    justify-content:flex-start;
    padding:0 10px;
    border-bottom:1px solid #edf1f6;
    font-size:15px;
  }

  .main-nav.open a:last-child{
    border-bottom:0;
  }

  .main-nav.open .nav-contact{
    width:100%;
    margin:12px 0 0;
    justify-content:center;
  }

  .hero,
  .hero-inner{
    min-height:600px;
  }

  .hero-image{
    background-position:40% top !important;
  }

  .hero-shade{
    background:linear-gradient(
      90deg,
      rgba(3,23,60,.95) 0%,
      rgba(4,28,67,.78) 50%,
      rgba(5,30,68,.28) 100%
    );
  }

  .hero-copy{
    width:min(600px, 78vw);
    padding:60px 0;
  }

  .hero h1{
    font-size:clamp(46px, 8vw, 64px);
  }

  .section{
    padding:76px 0;
  }

  .section h2,
  .strategy-section h2{
    font-size:clamp(36px, 6vw, 48px);
  }

  .strategy-grid,
  .technology-grid,
  .contact-layout{
    grid-template-columns:1fr;
  }

  .strategy-card{
    min-height:auto;
  }

  .technology-card{
    min-height:auto;
  }

  /* Dense roadmap: preserve readability with contained horizontal scroll */
  .roadmap-card{
    overflow-x:auto !important;
    overflow-y:hidden !important;
    -webkit-overflow-scrolling:touch;
    scrollbar-width:thin;
    padding-bottom:8px !important;
  }

  .roadmap-card img{
    width:1000px !important;
    max-width:none !important;
    height:auto;
  }
}

/* -------- Phones -------- */
@media (max-width:620px){
  .container{
    width:calc(100% - 28px);
  }

  .header-inner{
    min-height:68px;
    height:68px;
  }

  .brand img{
    max-width:176px !important;
    max-height:43px !important;
  }

  .main-nav.open{
    top:68px;
  }

  .hero,
  .hero-inner{
    min-height:560px;
  }

  .hero-image{
    background-position:31% top !important;
  }

  .hero-shade{
    background:linear-gradient(
      90deg,
      rgba(3,23,60,.96) 0%,
      rgba(3,25,62,.86) 52%,
      rgba(3,25,62,.42) 100%
    );
  }

  .hero-copy{
    width:100%;
    max-width:520px;
    padding:48px 0;
  }

  .hero-kicker{
    letter-spacing:6px;
  }

  .hero h1{
    max-width:94%;
    font-size:clamp(40px, 12vw, 54px);
    line-height:1.01;
    letter-spacing:-2px;
  }

  .hero-message{
    max-width:92%;
    font-size:17px;
  }

  .hero-link{
    font-size:15px;
  }

  .section{
    padding:60px 0;
  }

  .section-heading{
    margin-bottom:32px;
  }

  .section h2,
  .strategy-section h2{
    font-size:34px;
    letter-spacing:-1px;
  }

  .leadership-intro-title{
    font-size:22px;
  }

  .leadership-intro-copy p{
    font-size:15px;
  }

  .leader-profile{
    padding:22px;
  }

  .leader-profile-top{
    flex-direction:column;
  }

  .leader-profile h3{
    font-size:20px;
  }

  .strategy-card{
    padding:24px;
  }

  .technology-card{
    padding:22px;
    flex-direction:column;
  }

  .tech-badge{
    width:58px;
    height:58px;
    flex-basis:58px;
  }

  .technology-card h3{
    font-size:23px;
  }

  .roadmap-card img{
    width:900px !important;
  }

  .contact-section h2{
    font-size:34px;
  }

  .contact-item a,
  .contact-item p{
    font-size:16px;
  }

  .footer-inner{
    flex-direction:column;
    gap:8px;
  }
}

/* -------- Very small phones -------- */
@media (max-width:380px){
  .container{
    width:calc(100% - 22px);
  }

  .brand img{
    max-width:158px !important;
  }

  .hero h1{
    font-size:39px;
  }

  .hero-message{
    font-size:16px;
  }

  .roadmap-card img{
    width:820px !important;
  }
}


/* ======================================================
   LIGHT THEME LOCK
   Prevent OS/browser dark mode from visually corrupting
   the SPETRA logo and header.
   ====================================================== */

:root{
  color-scheme: light only;
}

html,
body{
  background:#ffffff !important;
  color:#102a5c;
  color-scheme:light only;
}

.site-header,
.header-inner{
  background:#ffffff !important;
  color-scheme:light only;
}

/* Keep a guaranteed white backing behind the dark navy PNG logo. */
.brand{
  background:#ffffff !important;
  padding:4px 8px;
  border-radius:8px;
  forced-color-adjust:none;
  -webkit-print-color-adjust:exact;
  print-color-adjust:exact;
}

.brand img{
  opacity:1 !important;
  filter:none !important;
  mix-blend-mode:normal !important;
  forced-color-adjust:none;
}

/* Explicit dark-mode override: SPETRA site intentionally keeps its
   corporate light header and designed section colors. */
@media (prefers-color-scheme: dark){
  html,
  body{
    background:#ffffff !important;
    color:#102a5c !important;
  }

  .site-header,
  .header-inner,
  .main-nav.open{
    background:#ffffff !important;
  }

  .main-nav a{
    color:#102a5c !important;
  }

  .main-nav .nav-contact{
    background:#102a5c !important;
    color:#ffffff !important;
  }

  .brand{
    background:#ffffff !important;
  }

  .section-light,
  .platform-section,
  .roadmap-section{
    background:#ffffff !important;
  }

  .leader-profile,
  .technology-card{
    background:#ffffff !important;
    color:#102a5c !important;
  }

  .leader-profile-body p,
  .leadership-intro-copy p,
  .section-desc,
  .tech-point p{
    color:#627189 !important;
  }
}