:root{
  --accent:   #1967d2;
  --accent2:  #1557b0;
  --bg:       #ffffff;
  --bg2:      #f4f7fb;
  --card:     #ffffff;
  --text:     #1a1a2e;
  --muted:    #5a6a85;
  --line:     #e2e8f0;
  --navy:     #1a1a2e;
  --shadow:   0 4px 24px rgba(25,103,210,.10);
  --shadow2:  0 2px 10px rgba(0,0,0,.06);
  --radius:   14px;
  --max:      1100px;
}

*{box-sizing:border-box}
html,body{
  margin:0; padding:0;
  font-family: system-ui,-apple-system,Segoe UI,Roboto,'Apple SD Gothic Neo','Noto Sans KR',sans-serif;
  color: var(--text);
  background: var(--bg);
}
a{color:inherit; text-decoration:none}
a:hover{opacity:.85}
ul{margin:0; padding-left:1.2rem}
h1,h2,h3,h4{margin:0 0 .55rem; letter-spacing:-.02em; line-height:1.25}
p{margin:.2rem 0 0; line-height:1.7}

.container{width:min(var(--max), calc(100% - 2rem)); margin:0 auto}

.skip{position:absolute;left:-9999px;top:auto;width:1px;height:1px;overflow:hidden}
.skip:focus{left:1rem;top:1rem;width:auto;height:auto;padding:.6rem .8rem;background:#fff;color:#000;border-radius:.6rem;z-index:999}

/* ── NAV ── */
.nav-bar{
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav{
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .85rem 0;
}
.brand{display:flex; align-items:center}
.logo{
  height: 100px;
  width: auto;
  display: block;
  object-fit: contain;
}
.menu{
  display: flex;
  align-items: center;
  gap: .2rem;
}
.menu a{
  padding: .45rem .75rem;
  border-radius: 8px;
  font-size: .92rem;
  font-weight: 500;
  color: var(--text);
  transition: background .15s, color .15s;
}
.menu a:hover{background: var(--bg2); opacity:1}
.menu a.active{color: var(--accent)}

.hamburger{display:none; border:1px solid var(--line); background:#fff; border-radius:10px; padding:.5rem .55rem; cursor:pointer}
.hamburger span{display:block; width:20px; height:2px; background:var(--navy); margin:4px 0}

/* ── BTN ── */
.btn{
  display:inline-block;
  background: var(--accent);
  color: #fff !important;
  padding: .7rem 1.5rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: .93rem;
  border: none;
  cursor: pointer;
  transition: background .15s, box-shadow .15s;
}
.btn:hover{background: var(--accent2); box-shadow: var(--shadow); opacity:1}
.btn.ghost{
  background: transparent;
  color: var(--accent) !important;
  border: 1.5px solid var(--accent);
}
.btn.ghost:hover{background: rgba(25,103,210,.06); box-shadow:none}
.btn.small{padding: .42rem 1rem; font-size: .86rem}

/* ── HERO ── */
.hero-section{
  background: linear-gradient(135deg, #e8f0fe 0%, #f4f7fb 50%, #e3f2fd 100%);
  padding: 5rem 0 4.5rem;
  text-align: center;
}
.hero-inner{max-width: 760px}
.hero-label{
  font-size: .82rem;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: .75rem;
}
.hero-section h1{
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  color: var(--navy);
  margin-bottom: 1rem;
}
.hero-sub{
  font-size: 1.05rem;
  color: var(--muted);
  max-width: 560px;
  margin: 0 auto 2rem;
}
.cta{display:flex; gap:.75rem; flex-wrap:wrap; justify-content:center}

/* ── SECTION ── */
.section{padding: 5rem 0}
.section.alt{background: var(--bg2)}

.section-head{
  text-align: center;
  margin-bottom: 3rem;
}
.sec-label{
  display: inline-block;
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--accent);
  background: rgba(25,103,210,.08);
  padding: .25rem .75rem;
  border-radius: 99px;
  margin-bottom: .75rem;
}
.section-head h2{
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--navy);
  margin-bottom: .5rem;
}
.section-head p{
  font-size: .97rem;
  color: var(--muted);
  max-width: 560px;
  margin: 0 auto;
}

/* ── CARDS ── */
.cards{
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
}
.card{
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.75rem;
  box-shadow: var(--shadow2);
  transition: box-shadow .2s, border-color .2s, transform .2s;
}
.card:hover{
  box-shadow: var(--shadow);
  border-color: rgba(25,103,210,.25);
  transform: translateY(-2px);
}
.card h3{font-size: 1.05rem; font-weight: 700; color: var(--navy); margin-bottom: .5rem}
.card p{font-size: .9rem; color: var(--muted)}

.icon-wrap{
  width: 52px; height: 52px;
  background: rgba(25,103,210,.08);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  color: var(--accent);
}

.list{font-size: .88rem; color: var(--muted); margin-top: .75rem; line-height: 1.9}

.tiny{font-size: .8rem}
.muted{color: var(--muted)}

/* ── CALLOUT ── */
.callout{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  background: linear-gradient(135deg, rgba(25,103,210,.07), rgba(25,103,210,.03));
  border: 1px solid rgba(25,103,210,.18);
  border-radius: var(--radius);
  padding: 1.75rem 2rem;
  margin-top: 2.5rem;
}
.callout h3{font-size: 1.05rem; color: var(--navy)}
.callout p{font-size: .9rem; color: var(--muted)}

/* ── CONTACT ── */
.contact{
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 1.5rem;
}
.contact-row{
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: .6rem 0;
  border-bottom: 1px solid var(--line);
  font-size: .92rem;
}
.contact-row:last-of-type{border:none}
.label{font-weight: 600; min-width: 80px; color: var(--muted); font-size: .83rem}
.divider{height: 1px; background: var(--line); margin: 1.2rem 0}
.form label{display:flex; flex-direction:column; gap:.35rem; font-size:.88rem; font-weight:600; color:var(--text); margin-bottom:.9rem}
input,textarea{
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: .65rem .9rem;
  font-size: .92rem;
  color: var(--text);
  background: var(--bg2);
  outline: none;
  font-family: inherit;
  transition: border-color .15s;
}
input:focus,textarea:focus{border-color: var(--accent); background:#fff}
textarea{resize: vertical}

/* ── FOOTER ── */
.footer{margin-top: 2rem; padding-top: 1.5rem; border-top: 1px solid var(--line); text-align:center}
.footer p{font-size: .86rem; color: var(--muted)}

/* ── MOBILE MENU ── */
.mobile-menu{
  border-top: 1px solid var(--line);
  background: rgba(255,255,255,.98);
  display: grid;
  gap: .2rem;
  padding: .5rem 1rem .75rem;
}
.mobile-menu[hidden]{display: none}
.mobile-menu a{
  padding: .7rem .75rem;
  border-radius: 8px;
  font-size: .93rem;
  font-weight: 500;
  color: var(--navy);
  transition: background .15s;
}
.mobile-menu a:hover{background: var(--bg2); opacity:1}

/* ── RESPONSIVE ── */
@media (min-width: 901px){
  .mobile-menu{display:none !important}
}

@media (max-width: 900px){
  .menu{display:none}
  .hamburger{display:inline-block}
  .logo{height: 72px}
  .contact{grid-template-columns: 1fr}
  .callout{flex-direction: column; align-items: flex-start}
  .hero-section{padding: 3.5rem 0 3rem}
}

@media (max-width: 480px){
  .logo{height: 52px}
  .hero-section h1{font-size: 1.5rem}
  .cards{grid-template-columns: 1fr}
}