/* ION Chemicals (이온화학) — site styles v1.0
   Brand system from the ION Brand Identity guide (Concept 01 · Aperture). */

@font-face{font-family:'Plex';src:url('fonts/IBMPlexSans.ttf') format('truetype');font-weight:100 700;font-style:normal;font-display:swap}
@font-face{font-family:'PlexM';src:url('fonts/IBMPlexMono-Regular.ttf') format('truetype');font-display:swap}
@font-face{font-family:'PlexKR';src:url('fonts/IBMPlexSansKR-Regular.ttf') format('truetype');font-weight:400;font-display:swap}
@font-face{font-family:'PlexKR';src:url('fonts/IBMPlexSansKR-Medium.ttf') format('truetype');font-weight:500;font-display:swap}
@font-face{font-family:'PlexKR';src:url('fonts/IBMPlexSansKR-SemiBold.ttf') format('truetype');font-weight:600;font-display:swap}
@font-face{font-family:'PlexKR';src:url('fonts/IBMPlexSansKR-Bold.ttf') format('truetype');font-weight:700;font-display:swap}

:root{
  --ion:#1B44FF; --deep:#080C1C; --cyan:#00D0C4; --violet:#7A4BFF;
  --titan:#8A94A6; --paper:#F6F7FB; --amber:#FFAE1A; --line:#DFE3EE;
  --ink:#25293A; --spectrum:linear-gradient(100deg,#00D0C4 0%,#1B44FF 46%,#7A4BFF 100%);
  --wrap:1180px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'PlexKR','Plex',sans-serif;color:var(--deep);background:var(--paper);
  line-height:1.7;-webkit-font-smoothing:antialiased;word-break:keep-all}
body.en{font-family:'Plex','PlexKR',sans-serif;line-height:1.62;word-break:normal}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px}

/* utility */
.mono{font-family:'PlexM',monospace;font-size:.72rem;letter-spacing:.14em;text-transform:uppercase}
.eyebrow{font-family:'PlexM',monospace;font-size:.72rem;letter-spacing:.16em;text-transform:uppercase;color:var(--ion);display:block;margin-bottom:14px}
.dim{color:var(--titan)}
.spectrum-edge{position:relative}
.spectrum-edge::before{content:"";position:absolute;left:0;top:0;bottom:0;width:5px;background:var(--spectrum)}
.center{text-align:center}

/* ---------- header ---------- */
header.site{position:sticky;top:0;z-index:60;background:rgba(8,12,28,.96);
  backdrop-filter:blur(8px);border-bottom:1px solid rgba(255,255,255,.08)}
.spectrum-top{height:4px;background:var(--spectrum)}
.nav{display:flex;align-items:center;gap:28px;height:66px}
.nav .logo img{height:26px;width:auto}
.nav ul{list-style:none;display:flex;align-items:center;gap:26px;margin-left:auto}
.nav a.navlink{color:rgba(246,247,251,.82);font-size:.92rem;font-weight:500;
  padding:6px 0;position:relative}
.nav a.navlink:hover,.nav a.navlink.active{color:#fff}
.nav a.navlink.active::after{content:"";position:absolute;left:0;right:0;bottom:-4px;height:2px;background:var(--ion)}

/* coatings dropdown */
.hasmenu{position:relative}
.hasmenu>button{background:none;border:0;cursor:pointer;color:rgba(246,247,251,.82);
  font:inherit;font-size:.92rem;font-weight:500;display:flex;align-items:center;gap:6px}
.hasmenu>button:hover{color:#fff}
.hasmenu .menu{position:absolute;top:calc(100% + 12px);left:50%;transform:translateX(-50%) translateY(6px);
  background:#0d1226;border:1px solid rgba(255,255,255,.1);border-radius:12px;padding:8px;
  min-width:300px;opacity:0;visibility:hidden;transition:.18s;box-shadow:0 24px 60px rgba(0,0,0,.5)}
.hasmenu:hover .menu,.hasmenu:focus-within .menu{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.hasmenu .menu a{display:block;padding:9px 12px;border-radius:8px;color:rgba(246,247,251,.8);font-size:.9rem}
.hasmenu .menu a:hover{background:rgba(27,68,255,.16);color:#fff}

.langtoggle{display:flex;border:1px solid rgba(255,255,255,.18);border-radius:999px;overflow:hidden;margin-left:6px}
.langbtn{background:none;border:0;cursor:pointer;color:rgba(246,247,251,.6);font-family:'PlexM',monospace;
  font-size:.68rem;letter-spacing:.08em;padding:6px 11px}
.langbtn[aria-pressed="true"]{background:var(--ion);color:#fff}
.navtoggle{display:none;background:none;border:0;cursor:pointer;flex-direction:column;gap:5px;padding:6px;margin-left:auto}
.navtoggle span{width:22px;height:2px;background:#fff;display:block}

/* ---------- hero ---------- */
.hero{background:var(--deep);color:var(--paper);position:relative;overflow:hidden;min-height:min(88vh,760px);
  display:flex;align-items:center}
.hero-slides{position:absolute;inset:0;z-index:0}
.hero-slide{position:absolute;inset:0;background:#0d1226 center/cover no-repeat;
  opacity:0;transform:scale(1.04);transition:opacity 1.6s ease,transform 7s ease;
  will-change:opacity,transform}
.hero-slide.is-active{opacity:1;transform:scale(1)}
.hero-veil{position:absolute;inset:0;z-index:1;pointer-events:none;
  background:
    linear-gradient(105deg,rgba(8,12,28,.88) 0%,rgba(8,12,28,.72) 42%,rgba(8,12,28,.45) 100%),
    linear-gradient(180deg,rgba(8,12,28,.35) 0%,rgba(8,12,28,.15) 40%,rgba(8,12,28,.55) 100%)}
.hero .wrap{position:relative;z-index:2;padding:96px 24px 104px;width:100%}
.hero h1{font-size:clamp(2.1rem,4.6vw,3.7rem);line-height:1.14;font-weight:700;letter-spacing:-.02em;max-width:15ch;
  text-shadow:0 2px 24px rgba(0,0,0,.35)}
.hero p.lead{margin-top:22px;font-size:1.12rem;color:rgba(246,247,251,.78);max-width:56ch}
.hero .cta-row{margin-top:34px;display:flex;gap:14px;flex-wrap:wrap}
.hero-kr{margin-top:20px;font-family:'PlexM',monospace;font-size:.72rem;letter-spacing:.14em;
  color:rgba(246,247,251,.45);text-transform:uppercase}
@media (prefers-reduced-motion:reduce){
  .hero-slide{transition:opacity .4s ease;transform:none}
  .hero-slide.is-active{transform:none}
}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:9px;font-weight:600;font-size:.95rem;
  padding:13px 24px;border-radius:999px;cursor:pointer;border:1px solid transparent;transition:.16s}
.btn-primary{background:var(--ion);color:#fff}
.btn-primary:hover{background:#0f34e0;transform:translateY(-1px)}
.btn-ghost{border-color:rgba(255,255,255,.28);color:#fff}
.btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.06)}
.btn-dark{background:var(--deep);color:#fff}
.btn-dark:hover{background:#141a33}

/* ---------- sections ---------- */
section{padding:76px 0}
section.tight{padding:52px 0}
.sec-head{max-width:60ch}
.sec-head h2{font-size:clamp(1.7rem,3vw,2.5rem);line-height:1.18;font-weight:700;letter-spacing:-.018em}
.sec-head p{margin-top:16px;color:var(--ink);font-size:1.05rem}
.intro-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:center}

/* flagship cards */
.flagship{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin-top:8px}
.fcard{background:var(--deep);color:var(--paper);border-radius:16px;overflow:hidden;position:relative}
.fcard .ph{aspect-ratio:16/10;background:#0d1226 center/cover no-repeat}
.fcard .ph.ph-logo{
  aspect-ratio:auto;
  min-height:120px;
  background:#fff;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:28px 32px;
}
.fcard .ph.ph-logo img{
  width:100%;
  height:auto;
  max-height:72px;
  object-fit:contain;
  object-position:center;
  display:block;
}
.fcard .body{padding:22px 24px 26px}
.fcard h3{font-size:1.22rem;font-weight:600}
.fcard p{margin-top:8px;color:rgba(246,247,251,.66);font-size:.95rem}

/* coating category grid */
.cat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.cat{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;transition:.18s;display:flex;flex-direction:column}
.cat:hover{transform:translateY(-3px);box-shadow:0 18px 40px rgba(8,12,28,.09);border-color:#c9d0e6}
.cat .ph{aspect-ratio:16/9;background:#e9edf6 center/cover no-repeat}
.cat .body{padding:18px 20px 20px;flex:1;display:flex;flex-direction:column}
.cat .k{font-family:'PlexM',monospace;font-size:.66rem;letter-spacing:.12em;color:var(--ion);text-transform:uppercase}
.cat h3{font-size:1.08rem;font-weight:600;margin-top:7px}
.cat p{font-size:.9rem;color:var(--ink);margin-top:7px;flex:1}
.cat .go{margin-top:14px;font-size:.85rem;font-weight:600;color:var(--ion)}

/* ---------- CTA banner ---------- */
.cta{background:var(--deep);color:var(--paper);position:relative;overflow:hidden}
.cta::after{content:"";position:absolute;left:0;right:0;bottom:0;height:6px;background:var(--spectrum)}
.cta .wrap{padding:74px 24px;position:relative;z-index:2;text-align:center}
.cta h2{font-size:clamp(1.8rem,3.4vw,2.7rem);font-weight:700;letter-spacing:-.02em;max-width:20ch;margin:0 auto}
.cta p{margin:18px auto 0;max-width:56ch;color:rgba(246,247,251,.7)}
.cta .btn{margin-top:30px}

/* ---------- interior page ---------- */
.page-hero{background:var(--deep);color:var(--paper);position:relative;overflow:hidden}
.page-hero .ph{position:absolute;inset:0;background:#0d1226 center/cover no-repeat;opacity:.4}
.page-hero .wrap{position:relative;z-index:2;padding:82px 24px}
.page-hero h1{font-size:clamp(1.9rem,4vw,3rem);font-weight:700;letter-spacing:-.02em;max-width:18ch}
.page-hero p{margin-top:16px;color:rgba(246,247,251,.72);max-width:56ch;font-size:1.05rem}
.page-hero::after{content:"";position:absolute;left:0;right:0;bottom:0;height:5px;background:var(--spectrum);z-index:3}

.prose{max-width:74ch}
.prose h2{font-size:1.6rem;font-weight:700;letter-spacing:-.01em;margin:38px 0 14px}
.prose h3{font-size:1.2rem;font-weight:600;margin:28px 0 10px}
.prose p{margin:12px 0;color:var(--ink)}
.prose ul{margin:14px 0 14px 2px;list-style:none}
.prose ul li{position:relative;padding-left:26px;margin:9px 0;color:var(--ink)}
.prose ul li::before{content:"";position:absolute;left:2px;top:.62em;width:9px;height:9px;border-radius:50%;
  border:2.5px solid var(--ion)}
.two{display:grid;grid-template-columns:1.15fr .85fr;gap:52px;align-items:start}
.sidecard{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px 24px;position:relative}
.sidecard.spectrum-edge{padding-left:28px}
.sidecard h3{font-size:1.05rem;font-weight:600;margin-bottom:10px}
.sidecard .fig{width:100%;aspect-ratio:4/3;border-radius:10px;background:#e9edf6 center/cover no-repeat;margin-bottom:16px}

/* spec table */
.spec-table{width:100%;border-collapse:collapse;margin:20px 0;font-size:.92rem}
.spec-table th,.spec-table td{text-align:left;padding:12px 14px;border-bottom:1px solid var(--line);vertical-align:top}
.spec-table thead th{font-family:'PlexM',monospace;font-size:.68rem;letter-spacing:.1em;text-transform:uppercase;
  color:var(--titan);background:#fff}
.spec-table td:first-child{font-family:'PlexM',monospace;color:var(--ion);white-space:nowrap}
.spec-table tbody tr:hover{background:#fff}
.notice{background:#EEF1FF;border:1px dashed #b9c4ff;border-radius:12px;padding:16px 18px;margin:20px 0;font-size:.92rem;color:#2a3566}
.notice .mono{color:var(--ion);display:block;margin-bottom:6px}

/* ---------- contact ---------- */
.contact-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:52px;align-items:start}
.info-row{display:flex;gap:14px;padding:16px 0;border-bottom:1px solid var(--line)}
.info-row .k{font-family:'PlexM',monospace;font-size:.68rem;letter-spacing:.1em;text-transform:uppercase;
  color:var(--titan);min-width:92px;padding-top:3px}
.info-row .v{font-size:1rem}
form.cf{background:#fff;border:1px solid var(--line);border-radius:16px;padding:28px}
.field{margin-bottom:18px}
.field label{display:block;font-size:.82rem;font-weight:600;margin-bottom:7px}
.field input,.field textarea{width:100%;border:1px solid var(--line);border-radius:9px;padding:12px 14px;
  font:inherit;font-size:.95rem;background:var(--paper);color:var(--deep)}
.field input:focus,.field textarea:focus{outline:2px solid var(--ion);outline-offset:0;border-color:transparent}
.field textarea{min-height:130px;resize:vertical}

/* ---------- footer ---------- */
footer.site{background:var(--deep);color:rgba(246,247,251,.7);padding:60px 0 34px;position:relative}
footer.site .spectrum-top{position:absolute;left:0;right:0;top:0}
.f-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px}
footer.site img.flogo{height:30px;width:auto;margin-bottom:16px}
footer.site h4{font-family:'PlexM',monospace;font-size:.7rem;letter-spacing:.12em;text-transform:uppercase;
  color:rgba(246,247,251,.5);margin-bottom:14px}
footer.site ul{list-style:none}
footer.site ul li{margin:8px 0}
footer.site ul li a:hover{color:#fff}
footer.site .addr{font-size:.92rem;line-height:1.8}
.f-bottom{margin-top:44px;padding-top:20px;border-top:1px solid rgba(255,255,255,.1);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:.8rem;color:rgba(246,247,251,.45)}

/* ---------- responsive ---------- */
@media(max-width:900px){
  .intro-grid,.two,.contact-grid{grid-template-columns:1fr;gap:32px}
  .flagship{grid-template-columns:1fr}
  .cat-grid{grid-template-columns:1fr 1fr}
  .f-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:720px){
  .nav ul{position:fixed;inset:66px 0 auto 0;background:#0d1226;flex-direction:column;
    align-items:flex-start;gap:0;padding:10px 24px 20px;margin:0;display:none;border-bottom:1px solid rgba(255,255,255,.1)}
  body.navopen .nav ul{display:flex}
  .nav ul li{width:100%;border-bottom:1px solid rgba(255,255,255,.06)}
  .nav a.navlink{display:block;padding:13px 0;width:100%}
  .hasmenu{width:100%}
  .hasmenu>button{padding:13px 0;width:100%}
  .hasmenu .menu{position:static;transform:none;opacity:1;visibility:visible;box-shadow:none;
    background:transparent;border:0;min-width:0;padding:0 0 8px 10px}
  .hasmenu .menu a{color:rgba(246,247,251,.7)}
  .navtoggle{display:flex;order:3}
  .langtoggle{order:2}
  .nav .logo{order:1}
  .cat-grid,.f-grid{grid-template-columns:1fr}
}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}