/* ===========================================================
   이조코퍼레이션 — Design tokens
   Navy/teal sourced directly from brand mark:
   navy #001959 · teal #51AF9F
   =========================================================== */
:root{
  --navy-brand: #001959;
  --bg-base:    #060B1A;
  --bg-mid:     #0A1638;
  --bg-card:    #0E1F47;
  --bg-card-hi: #11264F;

  --teal:        #51AF9F;
  --teal-bright: #7FE0CB;

  --ink-0: #EAF1F3;
  --ink-1: #AEC0D1;
  --ink-2: #6C7E94;

  --line:      rgba(234,241,243,0.09);
  --line-hi:   rgba(127,224,203,0.35);

  --font-display: 'IBM Plex Sans KR', 'Pretendard', sans-serif;
  --font-mono:    'IBM Plex Mono', 'SFMono-Regular', monospace;

  --max: 1140px;
  --ease: cubic-bezier(.22,1,.36,1);
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  *{ animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}

body{
  margin:0;
  background: var(--bg-base);
  color: var(--ink-0);
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img{ max-width:100%; display:block; }
a{ color: inherit; text-decoration: none; }
ul{ margin:0; padding:0; list-style:none; }
h1,h2,h3,p{ margin:0; }

.mono{ font-family: var(--font-mono); letter-spacing: 0.04em; }

::selection{ background: var(--teal); color: var(--bg-base); }

:focus-visible{
  outline: 2px solid var(--teal-bright);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link{
  position:absolute; left:-999px; top:auto;
  background: var(--teal); color:#04201c; padding:10px 16px; border-radius: 8px; z-index: 999;
}
.skip-link:focus{ left: 16px; top: 16px; }

/* ===== Background atmosphere ===== */
body{
  background-image:
    radial-gradient(ellipse 900px 500px at 15% 0%, rgba(81,175,159,0.10), transparent 60%),
    radial-gradient(ellipse 700px 600px at 100% 10%, rgba(0,25,89,0.55), transparent 55%),
    linear-gradient(180deg, var(--bg-base) 0%, var(--bg-mid) 45%, var(--bg-base) 100%);
  background-attachment: fixed;
}

/* ===========================================================
   Header
   =========================================================== */
.site-header{
  position: fixed; top:0; left:0; right:0; z-index: 100;
  border-bottom: 1px solid transparent;
  transition: background-color .35s var(--ease), border-color .35s var(--ease), backdrop-filter .35s var(--ease);
}
.site-header.is-scrolled{
  background: rgba(6,11,26,0.72);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom-color: var(--line);
}
.header-inner{
  max-width: var(--max); margin: 0 auto; padding: 0 24px;
  height: 76px; display:flex; align-items:center; justify-content: space-between;
  gap: 24px;
}
.brand{ display:flex; align-items:center; flex-shrink:0; }
.brand-logo{ height: 30px; width:auto; }

.main-nav{ display:flex; gap: 32px; font-size: 0.95rem; color: var(--ink-1); }
.main-nav a{ position:relative; padding: 6px 0; transition: color .25s; }
.main-nav a::after{
  content:''; position:absolute; left:0; right:100%; bottom:0; height:1px;
  background: var(--teal-bright); transition: right .3s var(--ease);
}
.main-nav a:hover{ color: var(--ink-0); }
.main-nav a:hover::after{ right:0; }

.nav-toggle{
  display:none; flex-direction:column; justify-content:center; gap:5px;
  width: 38px; height: 38px; background:none; border:none; cursor:pointer; padding:0;
}
.nav-toggle span{ width: 22px; height: 1.5px; background: var(--ink-0); transition: transform .3s, opacity .3s; }
.nav-toggle.is-open span:nth-child(1){ transform: translateY(6.5px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2){ opacity:0; }
.nav-toggle.is-open span:nth-child(3){ transform: translateY(-6.5px) rotate(-45deg); }

@media (max-width: 720px){
  .nav-toggle{ display:flex; }
  .main-nav{
    position:absolute; top:76px; left:0; right:0;
    background: rgba(6,11,26,0.97); backdrop-filter: blur(14px);
    flex-direction:column; gap:0; border-bottom: 1px solid var(--line);
    max-height:0; overflow:hidden; transition: max-height .35s var(--ease);
  }
  .main-nav.is-open{ max-height: 220px; }
  .main-nav a{ padding: 18px 24px; border-top: 1px solid var(--line); }
}

/* ===========================================================
   Hero
   =========================================================== */
.hero{
  position:relative;
  padding: 168px 24px 0;
  overflow:hidden;
}
.hero-glow{
  position:absolute; inset:0; pointer-events:none; z-index:0;
  background:
    radial-gradient(560px 360px at 78% 18%, rgba(127,224,203,0.16), transparent 70%);
  filter: blur(10px);
}
.hero-inner{
  position:relative; z-index:1;
  max-width: var(--max); margin: 0 auto;
  padding-bottom: 96px;
}
.eyebrow{
  display:inline-flex; align-items:center; gap:8px;
  font-size: 0.78rem; color: var(--teal-bright);
  text-transform: uppercase;
  margin-bottom: 28px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}
.eyebrow .dot{ color: var(--ink-2); }

.hero-title{
  font-size: clamp(2.1rem, 5.4vw, 3.85rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.28;
  max-width: 900px;
  color: var(--ink-0);
}
.grad-text{
  background: linear-gradient(95deg, var(--teal-bright), var(--teal) 60%, #BFE9DF);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

.hero-sub{
  margin-top: 28px;
  max-width: 620px;
  font-size: 1.05rem;
  color: var(--ink-1);
  font-weight: 300;
  line-height: 1.8;
}

.hero-cta{ display:flex; gap:14px; margin-top: 44px; flex-wrap: wrap; }
.btn{
  display:inline-flex; align-items:center; justify-content:center;
  padding: 14px 28px; border-radius: 999px;
  font-size: 0.95rem; font-weight: 500;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), background .3s, border-color .3s;
}
.btn-primary{
  background: linear-gradient(95deg, var(--teal-bright), var(--teal));
  color: #04201c;
  box-shadow: 0 10px 30px -10px rgba(81,175,159,0.55);
}
.btn-primary:hover{ transform: translateY(-2px); box-shadow: 0 16px 36px -10px rgba(127,224,203,0.6); }
.btn-ghost{
  border: 1px solid var(--line);
  color: var(--ink-0);
}
.btn-ghost:hover{ border-color: var(--line-hi); background: rgba(255,255,255,0.03); transform: translateY(-2px); }

/* ----- Ticker (signature element) ----- */
.ticker{
  position: relative;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(255,255,255,0.015);
  overflow: hidden;
  padding: 16px 0;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}
.ticker-track{
  display:flex; align-items:center; gap: 22px; white-space:nowrap;
  width: max-content;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  color: var(--ink-1);
  animation: ticker-scroll 32s linear infinite;
}
.ticker-track .sep{ color: var(--teal); }
.ticker:hover .ticker-track{ animation-play-state: paused; }
@keyframes ticker-scroll{
  from{ transform: translateX(0); }
  to{ transform: translateX(-50%); }
}

/* ===========================================================
   Sections (shared)
   =========================================================== */
.section{ padding: 120px 24px; position:relative; }
.section-alt{ background: linear-gradient(180deg, transparent, rgba(0,25,89,0.18), transparent); }
.section-inner{ max-width: var(--max); margin:0 auto; }

.section .eyebrow{ border-bottom:none; padding-bottom:0; }
.section-title{
  font-size: clamp(1.7rem, 3.2vw, 2.4rem);
  font-weight: 700;
  margin-top: 12px;
  color: var(--ink-0);
}
.section-sub{
  margin-top: 14px;
  color: var(--ink-1);
  font-weight: 300;
  max-width: 560px;
  font-size: 1rem;
}

/* ----- reveal-on-scroll -----
   Content is visible by default (progressive enhancement).
   JS adds .reveal-armed only when it can also guarantee the
   reveal will fire, so a JS failure never hides content. */
.reveal{
  opacity: 1; transform: none;
  transition: opacity .7s var(--ease), transform .7s var(--ease);
}
.reveal.reveal-armed{ opacity: 0; transform: translateY(22px); }

/* ===========================================================
   Services
   =========================================================== */
.card-grid{
  margin-top: 56px;
  display:grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.card{
  position: relative;
  padding: 36px 32px 32px;
  border-radius: 18px;
  background: linear-gradient(160deg, var(--bg-card), var(--bg-mid));
  border: 1px solid var(--line);
  transition: transform .4s var(--ease), border-color .4s var(--ease), background .4s var(--ease);
}
.card::before{
  content:'';
  position:absolute; top:0; left: 32px; right: 32px; height:2px;
  background: linear-gradient(90deg, var(--teal-bright), transparent);
  opacity: .55;
}
.card:hover{
  transform: translateY(-6px);
  border-color: var(--line-hi);
  background: linear-gradient(160deg, var(--bg-card-hi), var(--bg-mid));
}
.card-tag{ font-size: 0.74rem; color: var(--teal-bright); margin-bottom: 16px; }
.card h3{ font-size: 1.28rem; font-weight: 600; color: var(--ink-0); margin-bottom: 20px; }
.card ul{ display:flex; flex-direction:column; gap: 12px; }
.card li{
  position:relative; padding-left: 18px;
  color: var(--ink-1); font-size: 0.94rem; font-weight: 300; line-height:1.6;
}
.card li::before{
  content:''; position:absolute; left:0; top:9px;
  width:6px; height:1.5px; background: var(--teal);
}

@media (max-width: 760px){
  .card-grid{ grid-template-columns: 1fr; }
}

/* ===========================================================
   Process timeline
   =========================================================== */
.timeline{ margin-top: 64px; position:relative; }
.timeline::before{
  content:'';
  position:absolute; left: 27px; top: 8px; bottom: 8px; width:1px;
  background: linear-gradient(180deg, var(--teal-bright), rgba(81,175,159,0.08));
}
.timeline-step{
  position:relative;
  display:flex; gap: 28px;
  padding-bottom: 52px;
}
.timeline-step:last-child{ padding-bottom: 0; }
.timeline-num{
  position:relative; z-index:1; flex-shrink:0;
  width: 56px; height: 56px;
  display:flex; align-items:center; justify-content:center;
  border-radius:50%;
  background: var(--bg-base);
  border: 1px solid var(--line-hi);
  color: var(--teal-bright);
  font-size: 0.95rem;
}
.timeline-body{ padding-top: 12px; }
.timeline-body h3{ font-size: 1.15rem; font-weight: 600; margin-bottom: 8px; color: var(--ink-0); }
.timeline-body p{ color: var(--ink-1); font-weight: 300; font-size: 0.95rem; }

/* ===========================================================
   Footer
   =========================================================== */
.site-footer{
  border-top: 1px solid var(--line);
  padding: 64px 24px 48px;
  text-align:center;
}
.footer-inner{ max-width: 480px; margin: 0 auto; }
.footer-mark{ width: 40px; height:auto; margin: 0 auto 20px; opacity: .9; }
.footer-name{ font-size: 1rem; color: var(--ink-0); font-weight: 600; }
.footer-name .mono{ color: var(--ink-2); font-weight: 400; font-size: 0.82rem; margin-left: 6px; }
.footer-desc{ margin-top: 12px; color: var(--ink-2); font-size: 0.85rem; font-weight:300; line-height:1.7; }
.footer-copy{ margin-top: 24px; color: var(--ink-2); font-size: 0.74rem; }