/* ============================================================
   T4L (티포엘) — Style 3 : Modern B2B Tech / Manufacturing
   Light, trustworthy corporate. Plus Jakarta Sans.
   ============================================================ */

:root{
  --white:#ffffff;
  --navy:#0b2545;
  --sky:#2e74ff;
  --sky-dark:#1f5fe0;
  --gray:#5b6473;
  --gray-light:#8a92a0;
  --bg-soft:#f5f7fb;
  --bg-soft-2:#eef2f9;
  --border:#e4e9f2;
  --shadow-sm:0 2px 10px rgba(11,37,69,.06);
  --shadow:0 14px 40px rgba(11,37,69,.10);
  --shadow-lg:0 24px 60px rgba(11,37,69,.16);
  --radius:16px;
  --radius-lg:22px;
  --radius-pill:999px;
  --maxw:1180px;
  --header-h:76px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --font:'Plus Jakarta Sans',system-ui,sans-serif;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:var(--header-h)}
body{
  font-family:var(--font);
  color:var(--navy);
  background:var(--white);
  line-height:1.65;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}

.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  font-family:var(--font);font-weight:600;font-size:.95rem;
  padding:.8rem 1.5rem;border-radius:var(--radius-pill);
  border:1.5px solid transparent;cursor:pointer;
  transition:transform .25s var(--ease),background .25s,box-shadow .25s,color .25s;
  white-space:nowrap;
}
.btn-primary{background:var(--sky);color:#fff;box-shadow:0 10px 24px rgba(46,116,255,.28)}
.btn-primary:hover{background:var(--sky-dark);transform:translateY(-2px);box-shadow:0 14px 30px rgba(46,116,255,.34)}
.btn-ghost{background:transparent;color:var(--navy);border-color:var(--border)}
.btn-ghost:hover{border-color:var(--sky);color:var(--sky);transform:translateY(-2px)}
.btn-pill{background:var(--sky);color:#fff;padding:.62rem 1.3rem;font-size:.88rem;box-shadow:0 8px 20px rgba(46,116,255,.25)}
.btn-pill:hover{background:var(--sky-dark);transform:translateY(-2px)}
.btn-block{width:100%;padding:1rem}

/* ---------- Header ---------- */
.site-header{
  position:fixed;top:0;left:0;width:100%;z-index:1000;
  height:var(--header-h);background:rgba(255,255,255,.92);
  backdrop-filter:saturate(160%) blur(10px);
  border-bottom:1px solid transparent;
  transition:box-shadow .3s,border-color .3s,background .3s;
}
.site-header.scrolled{box-shadow:var(--shadow-sm);border-bottom-color:var(--border)}
.header-inner{height:100%;display:flex;align-items:center;justify-content:space-between}
.brand-logo{height:44px;width:auto}
.nav{display:flex;align-items:center;gap:2rem}
.nav-link{
  font-weight:600;font-size:.95rem;color:var(--navy);position:relative;
  transition:color .2s;
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:-6px;width:0;height:2px;
  background:var(--sky);transition:width .25s var(--ease);border-radius:2px;
}
.nav-link:hover{color:var(--sky)}
.nav-link:hover::after{width:100%}
.nav-cta{margin-left:.5rem}

/* hamburger */
.hamburger{
  display:none;flex-direction:column;justify-content:center;gap:5px;
  width:44px;height:44px;background:transparent;border:none;cursor:pointer;
}
.hamburger span{display:block;width:24px;height:2px;background:var(--navy);border-radius:2px;transition:transform .3s var(--ease),opacity .3s}
.hamburger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.hamburger.open span:nth-child(2){opacity:0}
.hamburger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- Hero ---------- */
.hero{padding:calc(var(--header-h) + 64px) 0 64px;background:
  radial-gradient(1100px 520px at 88% -8%, rgba(46,116,255,.08), transparent 60%),
  var(--white);
}
.hero-grid{
  display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;
}
.eyebrow{
  display:inline-block;font-weight:700;font-size:.82rem;letter-spacing:.14em;
  text-transform:uppercase;color:var(--sky);margin-bottom:1.1rem;
}
.hero-title{
  font-size:clamp(2rem,4.2vw,3.1rem);font-weight:800;line-height:1.22;
  letter-spacing:-.02em;color:var(--navy);
  word-break:keep-all;overflow-wrap:break-word;
}
.hero-title .accent{color:var(--sky)}
.hero-lead{margin-top:1.4rem;color:var(--gray);font-size:1.08rem;max-width:42ch}

.hero-tabs{display:flex;gap:.5rem;margin-top:2rem;flex-wrap:wrap}
.hero-tab{
  font-family:var(--font);font-weight:600;font-size:.9rem;
  padding:.55rem 1.1rem;border-radius:var(--radius-pill);
  border:1.5px solid var(--border);background:var(--white);color:var(--gray);
  cursor:pointer;transition:all .25s var(--ease);
}
.hero-tab.is-active{background:var(--navy);color:#fff;border-color:var(--navy)}
.hero-tab:hover:not(.is-active){border-color:var(--sky);color:var(--sky)}
.hero-panels{margin-top:1rem;min-height:3.4em}
.hero-panel{
  display:none;color:var(--navy);font-weight:500;font-size:1.05rem;
  padding-left:1rem;border-left:3px solid var(--sky);
}
.hero-panel.is-active{display:block;animation:fadeSlide .45s var(--ease)}
@keyframes fadeSlide{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}

.hero-actions{display:flex;gap:.9rem;margin-top:2.2rem;flex-wrap:wrap}

.hero-visual{position:relative}
.hero-image-card{
  border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-lg);
  position:relative;aspect-ratio:4/3.4;
}
.hero-image-card::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(11,37,69,.05),rgba(11,37,69,.28));
}
.hero-image-card img{width:100%;height:100%;object-fit:cover}

/* ---------- Stats ---------- */
.stats{
  display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:64px;
}
.stat-card{
  background:var(--bg-soft);border:1px solid var(--border);
  border-radius:var(--radius);padding:1.8rem 1.6rem;text-align:center;
  transition:transform .3s var(--ease),box-shadow .3s;
}
.stat-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.stat-num{font-size:clamp(2.2rem,4vw,2.9rem);font-weight:800;color:var(--sky);line-height:1;letter-spacing:-.02em}
.stat-label{margin-top:.6rem;color:var(--gray);font-weight:600;font-size:.95rem}

/* ---------- Sections ---------- */
.section{padding:96px 0}
.section-head{margin-bottom:48px;max-width:680px}
.section-head--sub{margin-top:72px}
.section-tag{
  display:inline-block;font-weight:700;font-size:.78rem;letter-spacing:.16em;
  text-transform:uppercase;color:var(--sky);margin-bottom:.9rem;
}
.section-title{font-size:clamp(1.7rem,3.2vw,2.4rem);font-weight:800;letter-spacing:-.02em;color:var(--navy)}
.section-subtitle{font-size:clamp(1.4rem,2.6vw,1.9rem);font-weight:700;color:var(--navy)}
.section-head--light .section-title,.section-head--light .section-tag{color:#fff}
.section-head--light .section-tag{color:#9ec0ff}

/* ---------- About ---------- */
.about{background:var(--white)}
.about-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}
.about-text p{color:var(--gray);font-size:1.05rem;line-height:1.9}
.about-figure{border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow)}
.about-figure img{width:100%;aspect-ratio:4/3;object-fit:cover}

/* Tech grid */
.tech-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.tech-card{
  background:var(--white);border:1px solid var(--border);border-radius:var(--radius);
  padding:1.6rem;display:flex;gap:1rem;align-items:flex-start;
  transition:transform .3s var(--ease),box-shadow .3s,border-color .3s;
}
.tech-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:transparent}
.tech-icon{
  flex:0 0 46px;width:46px;height:46px;border-radius:12px;
  background:rgba(46,116,255,.10);color:var(--sky);
  display:grid;place-items:center;
}
.tech-icon svg{width:24px;height:24px}
.tech-card p{color:var(--navy);font-weight:600;font-size:.98rem;line-height:1.5}

/* ---------- History ---------- */
.history{position:relative;background:var(--navy);color:#fff;overflow:hidden}
.history-bg{
  position:absolute;inset:0;background-size:cover;background-position:center;
  opacity:.16;filter:saturate(.7);
}
.history .container{position:relative;z-index:1}
.timeline{position:relative;border-left:2px solid rgba(255,255,255,.18);margin-left:8px;padding-left:8px}
.tl-item{display:grid;grid-template-columns:120px 1fr;gap:24px;padding:0 0 38px 28px;position:relative}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{
  content:"";position:absolute;left:-9px;top:6px;width:16px;height:16px;
  border-radius:50%;background:var(--sky);box-shadow:0 0 0 5px rgba(46,116,255,.22);
}
.tl-year{font-size:1.7rem;font-weight:800;color:#9ec0ff;letter-spacing:-.02em}
.tl-body ul li{
  position:relative;padding-left:1.1rem;margin-bottom:.55rem;
  color:rgba(255,255,255,.86);font-size:1rem;line-height:1.6;
}
.tl-body ul li::before{content:"";position:absolute;left:0;top:.65em;width:6px;height:6px;border-radius:50%;background:var(--sky)}

/* ---------- Services ---------- */
.services{background:var(--bg-soft)}
.services-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.service-card{
  background:var(--white);border-radius:var(--radius-lg);overflow:hidden;
  border:1px solid var(--border);box-shadow:var(--shadow-sm);
  display:flex;flex-direction:column;
  transition:transform .35s var(--ease),box-shadow .35s;
}
.service-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.service-media{
  height:200px;background:var(--bg-soft-2);
  display:grid;place-items:center;overflow:hidden;padding:18px;
}
.service-media img{max-height:100%;width:auto;object-fit:contain;transition:transform .4s var(--ease)}
.service-card:hover .service-media img{transform:scale(1.05)}
.service-body{padding:1.7rem 1.6rem 2rem;position:relative}
.service-no{
  font-size:.85rem;font-weight:800;color:var(--sky);letter-spacing:.1em;
}
.service-name{font-size:1.3rem;font-weight:700;color:var(--navy);margin:.4rem 0 .7rem}
.service-body p{color:var(--gray);font-size:.98rem;line-height:1.7}

/* ---------- Contact ---------- */
.contact{background:var(--white)}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
.contact-list{margin-bottom:28px}
.contact-list li{
  display:flex;gap:1rem;align-items:baseline;padding:1rem 0;
  border-bottom:1px solid var(--border);
}
.ci-label{
  flex:0 0 70px;font-weight:700;font-size:.78rem;letter-spacing:.1em;
  text-transform:uppercase;color:var(--sky);
}
.contact-list a,.contact-list span:not(.ci-label){color:var(--navy);font-weight:500}
.contact-list a:hover{color:var(--sky)}
.contact-map{border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);border:1px solid var(--border)}
.contact-map iframe{width:100%;height:280px;border:0;display:block;filter:grayscale(.1)}

.contact-form{
  background:var(--bg-soft);border:1px solid var(--border);
  border-radius:var(--radius-lg);padding:2rem;box-shadow:var(--shadow-sm);
}
.field{margin-bottom:1.2rem}
.field label{
  display:block;font-weight:700;font-size:.76rem;letter-spacing:.1em;
  text-transform:uppercase;color:var(--gray);margin-bottom:.5rem;
}
.field input,.field textarea{
  width:100%;font-family:var(--font);font-size:.98rem;color:var(--navy);
  background:var(--white);border:1.5px solid var(--border);border-radius:12px;
  padding:.85rem 1rem;transition:border-color .2s,box-shadow .2s;resize:vertical;
}
.field input::placeholder,.field textarea::placeholder{color:var(--gray-light)}
.field input:focus,.field textarea:focus{
  outline:none;border-color:var(--sky);box-shadow:0 0 0 3px rgba(46,116,255,.15);
}

/* ---------- Footer ---------- */
.site-footer{background:var(--navy);color:rgba(255,255,255,.8);padding:56px 0 40px}
.footer-inner{display:flex;justify-content:space-between;gap:32px;flex-wrap:wrap}
.footer-logo{height:40px;width:auto;background:#fff;padding:8px 12px;border-radius:10px}
.footer-slogan{margin-top:.9rem;color:#9ec0ff;font-weight:600;letter-spacing:.02em}
.footer-meta{text-align:right;font-size:.92rem;line-height:1.9}
.footer-copy{margin-top:.8rem;color:rgba(255,255,255,.55);font-size:.86rem}

/* ---------- Reveal (JS-driven; fallback visible) ---------- */
.reveal{opacity:1}
.js-anim .reveal{opacity:0}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width:980px){
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero-visual{order:-1}
  .hero-image-card{aspect-ratio:16/9;max-height:340px}
  .about-grid{grid-template-columns:1fr;gap:32px}
  .tech-grid{grid-template-columns:repeat(2,1fr)}
  .services-grid{grid-template-columns:1fr;max-width:480px;margin:0 auto}
  .contact-grid{grid-template-columns:1fr;gap:32px}
}

@media (max-width:720px){
  .nav{
    position:fixed;top:var(--header-h);right:0;
    width:min(78%,320px);height:calc(100vh - var(--header-h));
    flex-direction:column;align-items:flex-start;gap:1.4rem;
    background:#fff;padding:2rem;box-shadow:-12px 0 40px rgba(11,37,69,.12);
    transform:translateX(110%);transition:transform .35s var(--ease);
  }
  .nav.open{transform:translateX(0)}
  .nav-cta{margin-left:0;width:100%;justify-content:center}
  .hamburger{display:flex}
  .section{padding:72px 0}
  .stats{grid-template-columns:1fr;gap:14px;margin-top:48px}
  .tech-grid{grid-template-columns:1fr}
  .tl-item{grid-template-columns:1fr;gap:8px}
  .footer-inner{flex-direction:column}
  .footer-meta{text-align:left}
}

@media (max-width:420px){
  .container{padding:0 18px}
  .contact-form{padding:1.5rem}
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .js-anim .reveal{opacity:1!important;transform:none!important}
}