:root{
  --bg:#0F1419;
  --panel:#1a1a2e;
  --panel2:#242842;
  --text:#E0E0E0;
  --muted:#a9b4d0;
  --line:rgba(255,215,0,.15);
  --brand:#FFD700;
  --brand2:#6B2C91;
  --ok:#00FF00;
  --warn:#FFD700;
  --bad:#ff6b6b;
  --shadow: 0 10px 30px rgba(0,0,0,.35);
  --radius:18px;
  --radius2:24px;
  --max:1100px;
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, "Noto Sans KR", Arial, sans-serif;
  background:
    radial-gradient(1100px 700px at 15% -10%, rgba(255,215,0,.08), transparent 65%),
    radial-gradient(900px 700px at 105% 0%, rgba(107,44,145,.06), transparent 60%),
    radial-gradient(900px 700px at 40% 110%, rgba(255,215,0,.05), transparent 60%),
    var(--bg);
  color:var(--text);
}
a{color:inherit;text-decoration:none}
.container{max-width:var(--max);margin:0 auto;padding:0 18px}
.nav{
  position:sticky; top:0; z-index:40;
  backdrop-filter: blur(12px);
  background: rgba(15,20,25,.85);
  border-bottom:1px solid var(--line);
}
.nav-inner{
  display:flex; align-items:center; justify-content:space-between;
  padding:14px 0;
  gap:12px;
}
.brand{
  display:flex; align-items:center; gap:10px; font-weight:800; letter-spacing:.2px;
}
.brand-logo{width:34px;height:34px;border-radius:10px;object-fit:cover;box-shadow:var(--shadow)}
.brand-title{font-weight:900;letter-spacing:-.02em; color:var(--brand)}
.nav-links{display:flex; gap:10px; flex-wrap:wrap; align-items:center; justify-content:flex-end}
.nav-links a{
  padding:10px 12px;
  border:1px solid transparent;
  border-radius:14px;
  color:var(--muted);
  font-weight:650;
  font-size:14px;
  transition: all 0.2s;
}
.nav-links a:hover{border-color:var(--brand); color:var(--brand); background:rgba(255,215,0,.05)}
.nav-links a.active{color:var(--brand); border-color:var(--brand); background:rgba(255,215,0,.10)}
.cta{
  display:inline-flex; align-items:center; justify-content:center;
  gap:10px;
  padding:12px 14px;
  border-radius:16px;
  border:1px solid var(--brand);
  background: linear-gradient(180deg, rgba(255,215,0,.15), rgba(255,215,0,.05));
  box-shadow: 0 4px 12px rgba(255,215,0,.15);
  font-weight:750;
  transition: all 0.2s;
  color:var(--text);
}
.cta:hover{background: linear-gradient(180deg, rgba(255,215,0,.20), rgba(255,215,0,.10)); box-shadow: 0 6px 16px rgba(255,215,0,.20)}
.cta.secondary{
  border-color:var(--muted);
  background: rgba(255,255,255,.08);
  box-shadow: 0 4px 12px rgba(0,0,0,.15);
  color:var(--text);
}
.cta.secondary:hover{background: rgba(255,255,255,.12); box-shadow: 0 6px 16px rgba(255,215,0,.12)}
.hero{padding:48px 0 18px}
.hero-grid{
  display:grid;
  grid-template-columns: 1.15fr .85fr;
  gap:22px;
  align-items:stretch;
}
.card{
  background: var(--panel);
  border:1px solid var(--line);
  border-radius:var(--radius2);
  box-shadow: var(--shadow);
  transition: all 0.3s;
}
.card:hover{box-shadow: 0 12px 40px rgba(255,215,0,.12); border-color:rgba(255,215,0,.25)}
.card .pad{padding:22px}
.kicker{color:var(--brand); font-weight:700; letter-spacing:.12em; text-transform:uppercase; font-size:12px}
.h1{margin:10px 0 10px; font-size:38px; line-height:1.08; letter-spacing:-.6px; color:var(--text)}
.lead{color:var(--muted); font-size:16px; line-height:1.7; margin:0}
.hero-actions{display:flex; gap:10px; margin-top:16px; flex-wrap:wrap}
.pills{display:flex; gap:10px; flex-wrap:wrap; margin-top:16px}
.pill{
  display:flex; gap:8px; align-items:center;
  padding:10px 12px; border-radius:999px;
  border:1px solid var(--line);
  color:var(--muted);
  background: rgba(255,215,0,.08);
  font-weight:650; font-size:13px;
  transition: all 0.2s;
}
.pill:hover{border-color:var(--brand); background:rgba(255,215,0,.12); color:var(--brand)}
.grid-3{display:grid; grid-template-columns:repeat(3,1fr); gap:14px}
.section{padding:26px 0}
.section-dark{background:rgba(26,42,74,.04)}
.section-title{font-size:22px; margin:0 0 10px; letter-spacing:-.3px; color:var(--brand)}
.section-desc{margin:0 0 16px; color:var(--muted); line-height:1.7}
.feature{
  border-radius:var(--radius);
  border:1px solid var(--line);
  background: var(--panel);
  padding:16px;
  transition: all 0.2s;
}
.feature:hover{border-color:var(--brand); box-shadow: 0 4px 12px rgba(255,215,0,.12)}
.feature h3{margin:0 0 6px; font-size:16px; color:var(--text)}
.feature p{margin:0; color:var(--muted); line-height:1.7; font-size:14px}
.feature-icon{font-size:28px; margin-bottom:10px}
.hr{height:1px;background:var(--line);margin:18px 0}
.notice{
  display:flex; gap:12px; align-items:flex-start;
  padding:14px 14px;
  border-radius:var(--radius);
  border:1px solid var(--line);
  background: var(--panel2);
  color:var(--muted);
  font-size:13px; line-height:1.6;
}
.notice.notice-info{
  border-color:rgba(255,215,0,.25);
  background:rgba(255,215,0,.08);
}
.notice.notice-warn{
  border-color:rgba(255,215,0,.25);
  background:rgba(255,215,0,.08);
}
.notice.notice-critical{
  border-color:rgba(255,107,107,.25);
  background:rgba(255,107,107,.08);
}
.notice strong{color:var(--brand)}
.icon{
  width:30px;height:30px;border-radius:12px;
  display:grid;place-items:center;
  background: rgba(255,215,0,.15);
  border:1px solid rgba(255,215,0,.25);
  flex:0 0 auto;
  color:var(--brand);
}
.small{font-size:12.5px;color:var(--muted);line-height:1.65}
.footer{padding:26px 0 40px; color:var(--muted); border-top:1px solid var(--line)}
.footer a{color:var(--brand); text-decoration:none; font-weight:700}
.footer a:hover{text-decoration:underline}

/* Steps */
.steps{display:grid; gap:14px; margin:20px 0}
.step{
  display:flex; gap:16px;
  padding:16px;
  border-radius:var(--radius);
  border:1px solid var(--line);
  background:var(--panel);
  align-items:flex-start;
  transition: all 0.2s;
}
.step:hover{border-color:var(--brand); box-shadow: 0 4px 12px rgba(255,215,0,.12)}
.step-number{
  width:40px; height:40px;
  border-radius:50%;
  background:linear-gradient(135deg, var(--brand), var(--brand2));
  display:grid; place-items:center;
  font-weight:900; color:#0F1419;
  flex-shrink:0;
  font-size:18px;
  box-shadow: 0 4px 12px rgba(255,215,0,.25);
}
.step-content h3{margin:0 0 6px; font-size:15px; color:var(--text)}
.step-content p{margin:0; color:var(--muted); font-size:14px; line-height:1.6}

/* FAQ */
.faq-list{display:grid; gap:14px}
.faq-item{
  padding:16px;
  border-radius:var(--radius);
  border:1px solid var(--line);
  background:var(--panel);
  transition: all 0.2s;
}
.faq-item:hover{border-color:var(--brand); box-shadow: 0 4px 12px rgba(255,215,0,.12)}
.faq-item h3{margin:0 0 8px; font-size:15px; color:var(--brand)}
.faq-item p{margin:0; color:var(--muted); font-size:14px; line-height:1.6}

/* Warning list */
.warning-list{display:grid; gap:14px}
.warning-item{
  padding:16px;
  border-radius:var(--radius);
  border:1px solid rgba(255,107,107,.25);
  background:rgba(255,107,107,.08);
}
.warning-item h3{margin:0 0 8px; font-size:15px; color:#ff9999}
.warning-item p{margin:0; color:var(--muted); font-size:14px; line-height:1.6}

/* Stats */
.stat-inline{display:flex; gap:14px; flex-wrap:wrap}
.stat-small{
  flex:1; min-width:140px;
  padding:14px;
  border-radius:var(--radius);
  border:1px solid var(--line);
  background:var(--panel);
  transition: all 0.2s;
}
.stat-small:hover{border-color:var(--brand); background:var(--panel2)}
.stat-label{color:var(--muted); font-size:12px; font-weight:700}
.stat-value{color:var(--brand); font-size:20px; font-weight:900; margin-top:6px}

/* Calculator preview */
.calc-preview{margin:20px 0}
.quick-calc{display:grid; grid-template-columns:1fr 1fr auto; gap:12px; margin-bottom:20px; align-items:flex-end}
.quick-input{display:flex; flex-direction:column; gap:8px}
.quick-input label{color:var(--text); font-weight:700; font-size:13px}
.quick-input select{
  padding:10px 12px;
  border-radius:10px;
  border:1px solid var(--line);
  background:var(--panel);
  color:var(--text);
  font-weight:650;
  transition: all 0.2s;
}
.quick-input select:focus{border-color:var(--brand); box-shadow:0 0 0 3px rgba(255,215,0,.15)}
.quick-result{padding:16px; border-radius:var(--radius); border:1px solid rgba(255,215,0,.25); background:rgba(255,215,0,.08)}
.result-item{display:flex; justify-content:space-between; align-items:center; padding:8px 0}
.result-label{color:var(--muted); font-weight:700; font-size:13px}
.result-value{color:var(--brand); font-weight:900; font-size:18px}
.result-note{font-size:12px; color:var(--muted); margin-top:12px; line-height:1.5}
.result-note a{color:var(--brand); font-weight:700; text-decoration:none}

/* Form elements */
.form-grid{display:grid; grid-template-columns:1fr 1fr; gap:14px}
.field{display:flex; flex-direction:column; gap:8px}
label{font-weight:700; color:var(--text); font-size:13px}
input, select{
  padding:12px 12px;
  border-radius:14px;
  border:1px solid var(--line);
  background: var(--panel);
  color:var(--text);
  outline:none;
  font-size:15px;
  transition: all 0.2s;
}
input:focus, select:focus{border-color:var(--brand); box-shadow:0 0 0 3px rgba(255,215,0,.15)}
input[readonly]{opacity:.85; background:var(--panel2)}

.inline{display:flex; gap:10px; align-items:center; flex-wrap:wrap}
.action-buttons{display:flex; gap:10px; flex-wrap:wrap; justify-content:center}

.btn{
  cursor:pointer;
  padding:12px 14px;
  border-radius:14px;
  border:1px solid var(--line);
  background: var(--panel);
  color:var(--text);
  font-weight:750;
  font-size:14px;
  transition: all 0.2s;
}
.btn:hover{filter:brightness(1.1); border-color:var(--brand); box-shadow:0 4px 12px rgba(255,215,0,.12)}
.btn.primary{
  border-color:var(--brand);
  background: linear-gradient(180deg, rgba(255,215,0,.15), rgba(255,215,0,.08));
  color:var(--text);
}
.btn.primary:hover{background:linear-gradient(180deg, rgba(255,215,0,.20), rgba(255,215,0,.12))}

.badge{
  display:inline-flex; gap:8px; align-items:center;
  padding:8px 10px; border-radius:999px;
  border:1px solid var(--line);
  background: var(--panel2);
  color:var(--muted);
  font-weight:700; font-size:12px;
}
.badge.ok{border-color:rgba(0,255,0,.25); background:rgba(0,255,0,.08); color:#00FF00}
.badge.warn{border-color:rgba(255,215,0,.25); background:rgba(255,215,0,.08); color:var(--brand)}
.badge.bad{border-color:rgba(255,107,107,.25); background:rgba(255,107,107,.08); color:#ff6b6b}

.mono{font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;}

/* ==========================================
   CALCULATOR PAGE - SPECIAL STYLES
   ========================================== */

.calc-page .section{padding:34px 0 54px}
.calc-page .section-title{font-size:30px;letter-spacing:-.02em;margin:0 0 10px; color:var(--brand)}
.calc-page .section-desc{font-size:15.5px;line-height:1.55; color:var(--muted)}

.calc-card{
  background:var(--panel);
  border:2px solid var(--line);
  box-shadow: 0 8px 32px rgba(255,215,0,.12);
}

.calc-pad{
  padding:22px;
}

.calc-page label{
  font-size:14px;
  color:var(--text);
  font-weight:700;
}

.calc-page input{
  font-size:15px;
  padding:12px 14px;
  border-radius:12px;
  border:1px solid var(--line);
  background:var(--panel);
  color:var(--text);
}

.calc-page input:focus{
  border-color:var(--brand);
  box-shadow:0 0 0 3px rgba(255,215,0,.15);
  background:var(--panel);
}

.calc-page input[readonly]{
  opacity:.9;
  background:var(--panel2);
  color:var(--brand);
  font-weight:700;
}

.calc-page .btn{
  font-size:15px;
  padding:12px 14px;
  border-radius:12px;
}

.calc-btn{
  width:100%;
  padding:14px 16px;
  font-size:16px;
  font-weight:800;
}

.calc-page .badge{
  font-size:13px;
  padding:8px 12px;
  border-radius:999px;
}

/* STAT GRID - 중요 */
.stat-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:14px;
  margin:20px 0;
}

.stat{
  padding:16px;
  border-radius:var(--radius);
  border:2px solid var(--line);
  background:var(--panel);
  transition: all 0.2s;
}

.stat:hover{
  border-color:var(--brand);
  box-shadow: 0 4px 16px rgba(255,215,0,.15);
}

.stat .k{
  color:var(--muted);
  font-weight:700;
  font-size:12px;
  display:block;
  margin-bottom:8px;
}

.stat .v{
  margin-top:6px;
  font-size:18px;
  font-weight:900;
  letter-spacing:-.2px;
  color:var(--brand);
}

.stat .small{
  font-size:12px;
  color:var(--muted);
  margin-top:8px;
}

.stat.stat-accent{
  border-color:rgba(255,215,0,.35);
  background:rgba(255,215,0,.08);
}

.stat.stat-accent .v{
  color:var(--brand);
}

.xpoint-stat .k{
  display:none;
}

.xpoint-stat{
  padding-top:14px;
}

#out-xpoint .xpoint-line1{
  font-size:12px;
  color:var(--muted);
  margin-bottom:8px;
}

#out-xpoint .xpoint-line2{
  font-size:22px;
  font-weight:900;
  letter-spacing:-.01em;
  color:var(--brand);
  margin-bottom:6px;
}

#out-xpoint .xpoint-line3{
  font-size:11px;
  color:var(--brand2);
  margin-top:8px;
  font-weight:700;
}

/* CALC HELPER & TOAST */
.calc-helper{
  display:flex;
  align-items:center;
  gap:10px;
  margin-top:10px;
  flex-wrap:wrap;
}

.calc-helper .muted{
  color:var(--muted);
  font-size:13px;
}

.toast-yellow{
  display:inline-block;
  font-size:13px;
  color:var(--brand);
  opacity:0;
  transform:translateY(2px);
  transition:opacity .18s ease, transform .18s ease;
  white-space:nowrap;
  font-weight:700;
}

.toast-yellow.show{
  opacity:1;
  transform:translateY(0);
}

.hint-yellow{
  color:var(--brand);
  font-weight:700;
}

/* CALC NOTE */
.calc-note{
  border-style:solid;
  border-width:2px;
  padding:16px;
  border-radius:var(--radius);
  background:var(--panel);
}

.calc-note strong{
  color:var(--text);
  display:block;
  margin-bottom:8px;
}

.calc-note .icon{
  flex-shrink:0;
  margin-top:2px;
}

.calc-h3{
  margin:0 0 8px;
  font-size:18px;
  letter-spacing:-.01em;
  color:var(--text);
  font-weight:800;
}

/* MATURITY */
.maturity-3{
  grid-template-columns:repeat(3,minmax(0,1fr));
}

@media (max-width: 900px){
  .hero-grid{grid-template-columns:1fr}
  .grid-3{grid-template-columns:1fr}
  .form-grid{grid-template-columns:1fr}
  .quick-calc{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .stat-grid{grid-template-columns:1fr}
  .maturity-3{grid-template-columns:1fr}
  .h1{font-size:32px}
  .calc-page .section-title{font-size:24px}
}

/* Language select */
.lang-select{
  padding:10px 12px;
  border-radius:14px;
  border:1px solid var(--line);
  background: var(--panel);
  color: var(--text);
  font-weight:650;
  font-size:14px;
  outline:none;
  transition: all 0.2s;
}
.lang-select:focus{border-color:var(--brand); box-shadow:0 0 0 3px rgba(255,215,0,.15)}

/* Mobile hamburger */
.nav-toggle{
  display:none;
  align-items:center;
  justify-content:center;
  width:44px;height:44px;
  border-radius:14px;
  border:1px solid var(--line);
  background: var(--panel);
  color: var(--text);
  cursor:pointer;
  transition: all 0.2s;
}
.nav-toggle:hover{background: var(--panel2); border-color:var(--brand)}
.nav-toggle-icon{font-size:18px; line-height:1}

.nav-overlay{
  display:none;
  position:fixed;
  inset:0;
  background: rgba(0,0,0,.25);
  z-index:39;
}

@media (max-width: 860px){
  .nav-inner{padding:10px 0}
  .nav-toggle{display:inline-flex}
  .nav-links{
    display:none;
    position:fixed;
    left:12px; right:12px;
    top:64px;
    z-index:60;
    flex-direction:column;
    align-items:stretch;
    gap:8px;
    padding:12px;
    border-radius:18px;
    border:1px solid var(--line);
    background: var(--panel);
    backdrop-filter: blur(14px);
    box-shadow: 0 8px 24px rgba(0,0,0,.35);
    max-height: calc(100vh - 88px);
    overflow:auto;
  }
  body.nav-open .nav-links{display:flex}
  body.nav-open .nav-overlay{display:block}
  .nav-links a{width:100%; justify-content:flex-start}
  .lang-select{width:100%}
  .quick-calc{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
}