:root{
  --bg:#ffffff; --ink:#111827; --muted:#667085; --line:#e5e7eb;
  --soft:#f7f9fc; --brand:#5b5bd6; --brand2:#7c3aed; --dark:#0f172a;
  --max:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,"Noto Sans KR",system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:var(--bg);line-height:1.7}
a{color:inherit}
img{max-width:100%;display:block}
.container{width:min(var(--max),calc(100% - 40px));margin:0 auto}
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.nav{height:72px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{font-weight:850;font-size:24px;letter-spacing:-1px;text-decoration:none}
.brand span{font-weight:500;margin-left:3px}
.desktop-nav{display:flex;align-items:center;gap:24px}
.desktop-nav a{text-decoration:none;font-size:14px;font-weight:650;color:#374151}
.nav-cta{padding:10px 14px;border:1px solid var(--ink);border-radius:10px}
.menu-btn{display:none;background:none;border:0;font-size:24px}
.mobile-nav{display:none;padding:12px 20px 20px}
.mobile-nav a{display:block;text-decoration:none;padding:9px 0}
.mobile-nav.open{display:block}
.hero{padding:86px 0 66px;background:linear-gradient(180deg,#f8f9ff 0%,#fff 100%)}
.hero-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:60px;align-items:center}
.eyebrow{font-size:12px;font-weight:800;letter-spacing:.18em;color:var(--brand);margin-bottom:15px}
h1,h2,h3{letter-spacing:-.035em;line-height:1.2}
.hero h1{font-size:56px;margin:0}
.hero h1 span{color:var(--brand)}
.hero p{font-size:18px;color:var(--muted);max-width:760px}
.hero-card,.dark-panel{background:var(--dark);color:#fff;border-radius:22px;padding:28px;box-shadow:0 24px 70px rgba(15,23,42,.15)}
.hero-card ul{margin:0;padding-left:20px}
.hero-card li{margin:10px 0;color:#dbe3f0}
.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}
.btn{display:inline-flex;align-items:center;justify-content:center;text-decoration:none;border-radius:12px;padding:13px 20px;font-weight:750;border:1px solid transparent}
.btn.primary{background:var(--ink);color:#fff}
.btn.secondary{border-color:#d0d5dd;background:#fff;color:var(--ink)}
.section{padding:78px 0}
.section.alt{background:var(--soft)}
.section-head{max-width:760px;margin-bottom:34px}
.section h2{font-size:40px;margin:0 0 12px}
.section-head p,.lead{color:var(--muted);font-size:17px}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:26px}
.card h3{font-size:22px;margin:7px 0 8px}
.card p{color:var(--muted)}
.card .tag{display:inline-block;font-size:11px;font-weight:800;color:var(--brand);letter-spacing:.12em}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:start}
.checks{display:grid;gap:11px;margin-top:22px}
.checks div{font-weight:650}
.stat-row{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.stat{border:1px solid var(--line);border-radius:16px;padding:22px;background:#fff}
.stat strong{display:block;font-size:26px}
.stat span{font-size:13px;color:var(--muted)}
.project-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.project{border:1px solid var(--line);border-radius:16px;padding:24px}
.project small{color:var(--brand);font-weight:800}
.project h3{margin:6px 0}
.project p{color:var(--muted)}
.process{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.process>div{border-top:2px solid var(--ink);padding:18px 2px}
.process span{font-size:11px;font-weight:800;letter-spacing:.14em;color:var(--brand)}
.article{max-width:820px;margin:0 auto}
.article h1{font-size:46px;margin:0 0 20px}
.article h2{font-size:28px;margin-top:42px}
.article h3{font-size:22px;margin-top:28px}
.article p,.article li{color:#344054}
.article .meta{font-size:13px;color:#98a2b3;margin-bottom:24px}
.article .cta{margin:42px 0;background:var(--soft);border:1px solid var(--line);border-radius:16px;padding:24px}
.breadcrumb{font-size:13px;color:#98a2b3;margin-bottom:20px}
.service-hero{padding:64px 0 44px;background:linear-gradient(180deg,#f8f9ff 0%,#fff 100%)}
.service-hero h1{font-size:48px;margin:0 0 16px}
.service-hero p{font-size:18px;color:var(--muted);max-width:780px}
.faq{display:grid;gap:12px}
.faq details{border:1px solid var(--line);border-radius:14px;padding:16px 18px;background:#fff}
.faq summary{font-weight:750;cursor:pointer}
.contact-box{background:var(--dark);color:#fff;border-radius:20px;padding:30px}
.contact-box p{color:#cbd5e1}
footer{border-top:1px solid var(--line);padding:28px 0;margin-top:20px}
.footer-inner{display:flex;justify-content:space-between;gap:24px;align-items:flex-start}
.footer-links{display:flex;gap:18px;flex-wrap:wrap}
.footer-links a{text-decoration:none;color:var(--muted);font-size:13px}
.small{font-size:12px;color:#98a2b3}
@media(max-width:900px){
  .desktop-nav{display:none}.menu-btn{display:block}
  .hero-grid,.grid-2{grid-template-columns:1fr}
  .cards,.process,.stat-row{grid-template-columns:1fr 1fr}
  .hero h1{font-size:44px}.service-hero h1,.article h1{font-size:38px}
}
@media(max-width:640px){
  .container{width:min(var(--max),calc(100% - 28px))}
  .cards,.process,.stat-row,.project-grid{grid-template-columns:1fr}
  .hero h1{font-size:36px}.section h2{font-size:31px}.service-hero h1,.article h1{font-size:34px}
  .footer-inner{flex-direction:column}
}

/* v5 additions */
.audience-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.audience-card{border:1px solid var(--line);border-radius:18px;padding:26px;background:#fff}
.audience-card h3{margin:6px 0 10px;font-size:23px}
.audience-card ul{padding-left:18px;color:#475467}
.tech-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
.tech-card{border:1px solid var(--line);border-radius:16px;padding:20px;background:#fff}
.tech-card h3{font-size:18px;margin:0 0 10px}
.tech-card p{font-size:14px;color:var(--muted);margin:0}
.tech-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.tech-tags span{font-size:12px;padding:6px 9px;border:1px solid #d0d5dd;border-radius:999px;background:#fff}
.callout{border-left:4px solid var(--brand);background:#f8f9ff;padding:20px 22px;border-radius:12px}
.flowline{display:grid;grid-template-columns:repeat(5,1fr);gap:10px;align-items:stretch}
.flowstep{border:1px solid var(--line);border-radius:14px;padding:18px;background:#fff}
.flowstep strong{display:block;color:var(--brand);font-size:12px;letter-spacing:.1em;margin-bottom:6px}
.badge-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}
.badge{padding:8px 10px;border-radius:10px;background:#f2f4f7;border:1px solid var(--line);font-size:13px;font-weight:650}
@media(max-width:900px){.tech-grid{grid-template-columns:1fr 1fr 1fr}.flowline{grid-template-columns:1fr 1fr}.audience-grid{grid-template-columns:1fr}}
@media(max-width:640px){.tech-grid{grid-template-columns:1fr}.flowline{grid-template-columns:1fr}}

/* v6 managed-service positioning */
.positioning-strip{background:#0f172a;color:#fff;padding:18px 0}
.positioning-strip .container{display:flex;justify-content:space-between;gap:24px;align-items:center}
.positioning-strip strong{font-size:18px}
.positioning-strip span{font-size:13px;color:#cbd5e1}
.service-priority{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:18px}
.priority-card{border:1px solid var(--line);border-radius:18px;padding:26px;background:#fff}
.priority-card.primary{border:2px solid var(--brand);background:#fafaff}
.priority-card .rank{font-size:11px;font-weight:800;letter-spacing:.14em;color:var(--brand)}
.recurring-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.recurring-card{border:1px solid var(--line);border-radius:18px;padding:24px;background:#fff}
.recurring-card h3{margin:0 0 8px}
.recurring-card p{color:var(--muted)}
.scope-list{display:grid;gap:10px;margin-top:14px}
.scope-list div{display:flex;gap:10px;align-items:flex-start;color:#475467}
.scope-list b{color:var(--brand)}
.not-si{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.not-si>div{border:1px solid var(--line);border-radius:16px;padding:24px}
.not-si .avoid{background:#fff7f7}
.not-si .focus{background:#f7fbff}
.kpi-row{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.kpi{border:1px solid var(--line);border-radius:14px;padding:20px;background:#fff}
.kpi strong{display:block;font-size:20px;margin-bottom:4px}
.kpi span{font-size:13px;color:var(--muted)}
@media(max-width:900px){.service-priority,.recurring-grid,.kpi-row{grid-template-columns:1fr 1fr}.not-si{grid-template-columns:1fr}}
@media(max-width:640px){.service-priority,.recurring-grid,.kpi-row{grid-template-columns:1fr}.positioning-strip .container{align-items:flex-start;flex-direction:column}}

/* v7 balanced positioning */
.balance-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.balance-card{border:1px solid var(--line);border-radius:18px;padding:24px;background:#fff}
.balance-card h3{margin:8px 0 8px;font-size:21px}
.balance-card p{color:var(--muted)}
.balance-card .tag{display:inline-block;font-size:11px;font-weight:800;color:var(--brand);letter-spacing:.12em}
.dual-path{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.dual-path>div{border:1px solid var(--line);border-radius:18px;padding:26px;background:#fff}
.dual-path h3{margin-top:0}
.path-steps{display:grid;gap:10px;margin-top:18px}
.path-steps div{padding:12px 14px;border-radius:10px;background:#f8fafc;border:1px solid var(--line)}
@media(max-width:900px){.balance-grid{grid-template-columns:1fr 1fr}.dual-path{grid-template-columns:1fr}}
@media(max-width:640px){.balance-grid{grid-template-columns:1fr}}

.btn{transition:transform .15s ease,box-shadow .15s ease,background .15s ease}
.btn:hover{transform:translateY(-1px);box-shadow:0 8px 24px rgba(15,23,42,.08)}
.btn:focus-visible,a:focus-visible,button:focus-visible{outline:3px solid rgba(91,91,214,.28);outline-offset:3px}
.contact-box .btn.secondary{background:#fff;color:#111827;border-color:#fff}

.contact-form{display:grid;gap:18px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-field{display:grid;gap:7px}.form-field.full{grid-column:1/-1}.form-field label{font-size:13px;font-weight:750;color:#344054}
.form-field input,.form-field select,.form-field textarea{width:100%;border:1px solid #d0d5dd;border-radius:12px;background:#fff;color:#111827;padding:12px 14px;font:inherit;outline:none}
.form-field textarea{min-height:150px;resize:vertical}.form-field input:focus,.form-field select:focus,.form-field textarea:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(91,91,214,.10)}
.form-help{font-size:12px;color:#98a2b3}.checkbox-row{display:flex;gap:10px;align-items:flex-start;font-size:13px;color:#475467}.checkbox-row input{margin-top:4px}
.form-status{display:none;border-radius:12px;padding:13px 15px;font-size:14px}.form-status.show{display:block}.form-status.ok{background:#ecfdf3;border:1px solid #abefc6;color:#067647}.form-status.error{background:#fef3f2;border:1px solid #fecdca;color:#b42318}
.honeypot{position:absolute!important;left:-9999px!important;width:1px!important;height:1px!important;overflow:hidden!important}.contact-side{display:grid;gap:18px}.info-box{border:1px solid var(--line);border-radius:16px;padding:22px;background:#fff}.info-box h3{margin:0 0 8px}
@media(max-width:800px){.form-grid{grid-template-columns:1fr}.form-field.full{grid-column:auto}}

/* v10 form polish */
.form-field select{
  appearance:none;
  -webkit-appearance:none;
  -moz-appearance:none;
  padding-right:44px;
  background-image:
    linear-gradient(45deg, transparent 50%, #667085 50%),
    linear-gradient(135deg, #667085 50%, transparent 50%);
  background-position:
    calc(100% - 20px) calc(50% - 2px),
    calc(100% - 15px) calc(50% - 2px);
  background-size:5px 5px,5px 5px;
  background-repeat:no-repeat;
}
.checkbox-row{
  display:inline-flex;
  width:auto;
  max-width:100%;
  align-items:flex-start;
}
.checkbox-row input[type="checkbox"]{
  flex:0 0 18px;
  width:18px;
  height:18px;
  min-width:18px;
  margin:1px 0 0 0;
  padding:0;
  accent-color:var(--brand);
}