/* VISION-PARTS — core.css
 * 시안 A(draft/index-a.html)의 인라인 CSS 에서 그대로 추출.
 * 규칙을 고치지 말 것. 수정이 필요하면 시안과 픽셀 diff 를 다시 돌릴 것.
 * 로드 순서: core -> components -> home|page
 */

:root{
  --navy-950:#060D1F;
  --navy-900:#0A1830;
  --navy-800:#0B1F3A;
  --navy-700:#12294C;
  --cyan:#00C2FF;
  --blue:#2E6BFF;
  --ink:#111827;
  --gray:#5b6472;
  --line:#e5e7eb;
  --bg-soft:#f5f7fb;
  --white:#ffffff;
  --radius:18px;
  --mono:'Cascadia Code',Consolas,'JetBrains Mono',ui-monospace,monospace;
  --shadow-lg:0 24px 60px rgba(6,13,31,.14);
  --grad-brand:linear-gradient(135deg,var(--cyan) 0%,var(--blue) 100%);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:'Pretendard',-apple-system,BlinkMacSystemFont,'Apple SD Gothic Neo','Noto Sans KR',sans-serif;color:var(--ink);background:var(--white);line-height:1.6;word-break:keep-all;overflow-x:hidden}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
ul{list-style:none}
button{font-family:inherit;cursor:pointer}
.container{width:min(1340px,92%);margin:0 auto}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);font-size:13px;letter-spacing:.22em;text-transform:uppercase;color:var(--cyan);font-weight:700}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--grad-brand);border-radius:2px}
.sec-title{font-size:clamp(26px,3.4vw,42px);font-weight:800;line-height:1.25;letter-spacing:-.02em;margin:14px 0 12px}
.sec-desc{font-size:clamp(15px,1.4vw,18px);color:var(--gray);max-width:720px}
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s ease}
.reveal.on{opacity:1;transform:none}
/* ---------- header ---------- */
.header{position:fixed;inset:0 0 auto 0;z-index:100;transition:background .35s ease,box-shadow .35s ease,backdrop-filter .35s ease;padding:0}
.header .container{display:flex;align-items:center;justify-content:space-between;height:82px}
.header.scrolled{background:rgba(6,13,31,.82);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);box-shadow:0 8px 30px rgba(6,13,31,.35)}
.logo{display:flex;align-items:center;gap:10px}
.logo svg{height:30px;width:auto}
.gnb{display:flex;align-items:center;gap:6px}
.gnb>li{position:relative}
.gnb>li>a{display:block;padding:12px 16px;color:#EAF2FF;font-weight:600;font-size:15.5px;border-radius:10px;transition:.25s}
.gnb>li>a:hover{color:var(--cyan)}
.gnb .sub{position:absolute;top:calc(100% + 6px);left:50%;transform:translateX(-50%) translateY(8px);background:rgba(10,24,48,.96);backdrop-filter:blur(12px);border:1px solid rgba(0,194,255,.18);border-radius:14px;padding:10px;min-width:210px;opacity:0;visibility:hidden;transition:.28s}
.gnb>li:hover .sub{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.gnb .sub a{display:block;padding:9px 14px;font-size:14.5px;color:#C9D8F0;border-radius:9px;white-space:nowrap}
.gnb .sub a:hover{background:rgba(0,194,255,.12);color:var(--cyan)}
.gnb .badge-soon{font-size:10px;font-family:var(--mono);color:var(--cyan);border:1px solid rgba(0,194,255,.4);border-radius:20px;padding:1px 7px;margin-left:6px;vertical-align:2px}
.head-cta{display:flex;align-items:center;gap:12px}
.head-tel{display:flex;align-items:center;gap:8px;color:#fff;font-family:var(--mono);font-weight:700;font-size:17px;letter-spacing:.02em}
.head-tel svg{width:17px;height:17px}
.btn-quote{background:var(--grad-brand);color:#fff;font-weight:700;font-size:15px;padding:12px 22px;border:none;border-radius:12px;box-shadow:0 8px 24px rgba(0,150,255,.35);transition:.25s}
.btn-quote:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(0,150,255,.5)}
.ham{display:none;background:none;border:none;width:44px;height:44px;position:relative}
.ham span{position:absolute;left:10px;right:10px;height:2px;background:#fff;border-radius:2px;transition:.3s}
.ham span:nth-child(1){top:15px}.ham span:nth-child(2){top:22px}.ham span:nth-child(3){top:29px}
.btn-primary{display:inline-flex;align-items:center;gap:10px;background:var(--grad-brand);color:#fff;font-size:17px;font-weight:800;padding:17px 32px;border-radius:14px;border:none;box-shadow:0 14px 36px rgba(0,150,255,.4);transition:.25s}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 20px 44px rgba(0,150,255,.55)}
.btn-ghost{display:inline-flex;align-items:center;gap:10px;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.28);color:#fff;font-size:17px;font-weight:700;padding:17px 32px;border-radius:14px;backdrop-filter:blur(6px);transition:.25s}
.btn-ghost:hover{background:rgba(255,255,255,.16);border-color:rgba(255,255,255,.5)}
.hero-iso{display:flex;gap:12px;margin-top:46px;flex-wrap:wrap}
.iso-badge{display:flex;align-items:center;gap:9px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);border-radius:12px;padding:9px 16px;color:#D6E3F8;font-size:13.5px;font-weight:600}
.iso-badge svg{width:18px;height:18px;color:var(--cyan)}
.circuit-svg{position:absolute;right:-4%;bottom:-6%;width:56%;max-width:880px;opacity:.5;z-index:-1;pointer-events:none}
/* ---------- footer ---------- */
.footer{background:var(--navy-950);border-top:1px solid rgba(255,255,255,.07);padding:70px 0 40px;color:#8FA3C4}
.footer-slogan{font-size:clamp(19px,2vw,25px);color:#fff;font-weight:800;letter-spacing:-.01em}
.footer-slogan .accent{background:var(--grad-brand);-webkit-background-clip:text;background-clip:text;color:transparent}
.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:44px;margin-top:44px;padding-top:44px;border-top:1px solid rgba(255,255,255,.07)}
.footer h4{color:#fff;font-size:14.5px;font-weight:800;margin-bottom:16px}
.footer .f-info li{font-size:13.5px;line-height:2.05}
.footer .f-info b{color:#C9D8F0;font-weight:600}
.f-keywords{display:flex;flex-wrap:wrap;gap:7px}
.f-keywords a{font-size:12px;border:1px solid rgba(255,255,255,.13);border-radius:20px;padding:4px 12px;color:#8FA3C4;transition:.25s}
.f-keywords a:hover{color:var(--cyan);border-color:rgba(0,194,255,.5)}
.footer-bottom{margin-top:44px;padding-top:24px;border-top:1px solid rgba(255,255,255,.07);display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;font-size:12.3px;color:#5F7194}
.op-note{margin-top:14px;font-size:12.5px;color:#5F7194}
/* ---------- floating ---------- */
.floating{position:fixed;right:26px;bottom:26px;display:flex;flex-direction:column;gap:12px;z-index:90}
.fl-btn{width:58px;height:58px;border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:0 12px 30px rgba(6,13,31,.35);transition:.25s;position:relative}
.fl-btn:hover{transform:translateY(-4px) scale(1.05)}
.fl-kakao{background:#FAE100}
.fl-kakao svg{width:28px;height:28px}
.fl-tel{background:var(--grad-brand)}
.fl-tel svg{width:24px;height:24px;color:#fff}
.fl-btn .tip{position:absolute;right:calc(100% + 12px);top:50%;transform:translateY(-50%);background:var(--navy-900);color:#fff;font-size:12.5px;font-weight:700;padding:7px 13px;border-radius:9px;white-space:nowrap;opacity:0;visibility:hidden;transition:.25s}
.fl-btn:hover .tip{opacity:1;visibility:visible}
/* success modal */
.modal{position:fixed;inset:0;background:rgba(6,13,31,.7);backdrop-filter:blur(6px);display:none;align-items:center;justify-content:center;z-index:200}
.modal.show{display:flex}
.modal-card{background:#fff;border-radius:22px;padding:46px 52px;text-align:center;max-width:400px;width:90%}
.modal-card .m-ico{width:64px;height:64px;border-radius:50%;background:var(--grad-brand);display:flex;align-items:center;justify-content:center;margin:0 auto 20px}
.modal-card .m-ico svg{width:30px;height:30px;color:#fff}
.modal-card h3{font-size:20px;font-weight:800;margin-bottom:8px}
.modal-card p{font-size:14px;color:var(--gray);margin-bottom:24px}
.modal-card button{background:var(--navy-900);color:#fff;border:none;border-radius:12px;padding:13px 34px;font-size:15px;font-weight:700}

/* ---------- responsive ---------- */
@media (max-width:1100px){
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:768px){
  .gnb,.head-tel{display:none}
  .ham{display:block}
  .header .container{height:68px}
  .gnb.open{display:flex;position:fixed;inset:68px 0 auto 0;background:rgba(6,13,31,.97);backdrop-filter:blur(16px);flex-direction:column;padding:18px 6%;gap:2px;border-bottom:1px solid rgba(0,194,255,.2)}
  .gnb.open>li>a{padding:14px 10px;font-size:16px}
  .gnb.open .sub{position:static;transform:none;opacity:1;visibility:visible;background:transparent;border:none;padding:0 0 6px 18px;min-width:0}
  .btn-primary,.btn-ghost{justify-content:center;width:100%}
  .footer-grid{grid-template-columns:1fr;gap:30px}
  .floating{right:16px;bottom:16px}
  .fl-btn{width:52px;height:52px}
}

/* ---------- 운영 보강 (시안 외형 불변) ---------- */

/* 스킵 링크 — 포커스 전까지 화면 변화 없음 */
.skip{position:absolute;left:-9999px}
.skip:focus{left:16px;top:16px;z-index:300;background:var(--navy-900);color:#fff;padding:12px 18px;border-radius:10px;border:1px solid var(--cyan)}

/* fixed 헤더(82px)에 섹션 제목이 가리지 않도록 앵커 착지점 보정 */
section[id],div[id]{scroll-margin-top:96px}

/* 현재 페이지 표시 (빌드 시 .on 주입) */
.gnb>li>a{position:relative}
.gnb>li>a.on,.gnb>li>a.on-parent{color:var(--cyan)}
.gnb>li>a.on::after{content:"";position:absolute;left:16px;right:16px;bottom:7px;height:2px;background:var(--grad-brand);border-radius:2px}
.gnb .sub a.on{background:rgba(0,194,255,.12);color:var(--cyan)}

/* 햄버거 열림 상태 — 시안은 열려도 X 로 안 바뀌었다 */
.ham[aria-expanded="true"] span:nth-child(1){top:22px;transform:rotate(45deg)}
.ham[aria-expanded="true"] span:nth-child(2){opacity:0}
.ham[aria-expanded="true"] span:nth-child(3){top:22px;transform:rotate(-45deg)}

/* iOS 홈 인디케이터와 겹침 회피 (데스크톱에서는 env=0 이라 26px 그대로) */
.floating{bottom:calc(26px + env(safe-area-inset-bottom))}

@media (hover:none){
  /* 터치 기기는 hover 가 없어 드롭다운에 접근할 수 없었다 */
  .gnb>li:focus-within .sub{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
}
@media (max-width:768px){
  .gnb>li>a.on::after{display:none}
  /* GNB 6 + 서브 6 = 12항목이 뷰포트를 넘으면 스크롤이 안 됐다 */
  .gnb.open{max-height:calc(100dvh - 68px);overflow-y:auto;overscroll-behavior:contain;-webkit-overflow-scrolling:touch}
  .floating{bottom:calc(16px + env(safe-area-inset-bottom))}
}