:root {
  --bg: #0B1120;
  --bg-2: #111827;
  --bg-card: #1a2234;
  --fg: #f0f4ff;
  --fg-muted: #8896b3;
  --amber: #F59E0B;
  --amber-dim: rgba(245, 158, 11, 0.15);
  --border: rgba(148, 163, 184, 0.1);
  --success: #10b981;
  --fail: #ef4444;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: 'DM Sans', system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* NAV */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 0 48px;
  height: 64px;
  display: flex;
  align-items: center;
  background: rgba(11, 17, 32, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 20px;
  letter-spacing: -0.5px;
  color: var(--fg);
}

.nav-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--fg-muted);
  font-weight: 500;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--success);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* HERO */
.hero {
  padding: 140px 48px 100px;
  max-width: 1200px;
  margin: 0 auto;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--amber);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 24px;
}

.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--amber);
}

.hero-headline {
  font-family: 'Syne', sans-serif;
  font-size: clamp(42px, 5vw, 64px);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -1.5px;
  color: var(--fg);
  margin-bottom: 24px;
}

.hero-lede {
  font-size: 18px;
  color: var(--fg-muted);
  line-height: 1.7;
  max-width: 440px;
}

/* PAYMENT CARD */
.hero-visual {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.payment-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.4);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.card-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.card-live {
  font-size: 11px;
  font-weight: 700;
  color: var(--success);
  background: rgba(16, 185, 129, 0.12);
  padding: 3px 8px;
  border-radius: 4px;
  letter-spacing: 1px;
}

.card-metric {
  margin-bottom: 24px;
}

.metric-value {
  font-family: 'Syne', sans-serif;
  font-size: 48px;
  font-weight: 800;
  color: var(--fg);
  letter-spacing: -2px;
  line-height: 1;
}

.metric-label {
  font-size: 13px;
  color: var(--fg-muted);
  margin-top: 4px;
}

.card-chart {
  margin-bottom: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}

.chart-line {
  display: flex;
  align-items: flex-end;
  gap: 6px;
  height: 80px;
}

.chart-bar {
  flex: 1;
  background: rgba(148, 163, 184, 0.2);
  border-radius: 3px 3px 0 0;
  transition: all 0.3s;
}

.chart-bar.failed {
  background: rgba(239, 68, 68, 0.5);
}

.chart-bar.recovered {
  background: var(--amber);
}

.card-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.stat-value {
  font-family: 'Syne', sans-serif;
  font-size: 22px;
  font-weight: 700;
  color: var(--fg);
}

.stat-value.amber { color: var(--amber); }

.stat-label {
  font-size: 11px;
  color: var(--fg-muted);
  line-height: 1.4;
}

.hero-tagline {
  text-align: center;
  font-size: 13px;
  color: var(--fg-muted);
  font-style: italic;
}

/* SECTION COMMON */
.section-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--amber);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 16px;
}

/* PROBLEM */
.problem {
  padding: 100px 48px;
  background: var(--bg-2);
}

.problem-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.problem-label, .solution-label, .how-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--amber);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 20px;
}

.problem-headline, .solution-headline {
  font-family: 'Syne', sans-serif;
  font-size: clamp(28px, 3.5vw, 44px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -1px;
  max-width: 680px;
  margin-bottom: 60px;
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
  margin-bottom: 60px;
}

.problem-stat {
  background: var(--bg-card);
  padding: 40px 36px;
  border: 1px solid var(--border);
}

.problem-number {
  font-family: 'Syne', sans-serif;
  font-size: 56px;
  font-weight: 800;
  color: var(--amber);
  letter-spacing: -2px;
  line-height: 1;
  margin-bottom: 16px;
}

.problem-desc {
  font-size: 15px;
  color: var(--fg-muted);
  line-height: 1.6;
}

.problem-quote {
  border-left: 3px solid var(--amber);
  padding-left: 28px;
}

.problem-quote p {
  font-size: 20px;
  font-style: italic;
  color: var(--fg);
  margin-bottom: 8px;
}

.problem-quote span {
  font-size: 13px;
  color: var(--fg-muted);
}

/* SOLUTION */
.solution {
  padding: 100px 48px;
}

.solution-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.solution-desc {
  font-size: 18px;
  color: var(--fg-muted);
  max-width: 600px;
  line-height: 1.7;
  margin-bottom: 60px;
}

.solution-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2px;
}

.solution-item {
  display: flex;
  gap: 20px;
  background: var(--bg-card);
  padding: 32px;
  border: 1px solid var(--border);
  align-items: flex-start;
}

.solution-icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  background: var(--amber-dim);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--amber);
}

.solution-text {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.solution-text strong {
  font-size: 16px;
  font-weight: 600;
  color: var(--fg);
}

.solution-text span {
  font-size: 14px;
  color: var(--fg-muted);
  line-height: 1.5;
}

/* HOW */
.how {
  padding: 100px 48px;
  background: var(--bg-2);
}

.how-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.how-steps {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.step {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 40px;
  padding: 40px 0;
  border-bottom: 1px solid var(--border);
  align-items: start;
}

.step:first-child { border-top: 1px solid var(--border); }

.step-num {
  font-family: 'Syne', sans-serif;
  font-size: 13px;
  font-weight: 700;
  color: var(--amber);
  padding-top: 4px;
}

.step-content h3 {
  font-family: 'Syne', sans-serif;
  font-size: 20px;
  font-weight: 700;
  color: var(--fg);
  margin-bottom: 8px;
}

.step-content p {
  font-size: 15px;
  color: var(--fg-muted);
  line-height: 1.6;
  max-width: 560px;
}

/* RESULTS */
.results {
  padding: 100px 48px;
}

.results-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.results-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2px;
  margin-bottom: 40px;
}

.result-card {
  background: var(--bg-card);
  padding: 36px 28px;
  border: 1px solid var(--border);
}

.result-metric {
  font-family: 'Syne', sans-serif;
  font-size: 36px;
  font-weight: 800;
  color: var(--amber);
  letter-spacing: -1px;
  margin-bottom: 12px;
}

.result-label {
  font-size: 13px;
  color: var(--fg-muted);
  line-height: 1.5;
}

.results-callout {
  padding: 24px 32px;
  border: 1px solid var(--border);
  background: var(--bg-card);
}

.results-callout p {
  font-size: 14px;
  color: var(--fg-muted);
  text-align: center;
}

/* KOREA */
.korea {
  padding: 100px 48px;
  background: var(--bg-2);
}

.korea-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.korea-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--amber);
  margin-bottom: 20px;
}

.korea-headline {
  font-family: 'Syne', sans-serif;
  font-size: clamp(28px, 3vw, 40px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.5px;
  margin-bottom: 20px;
}

.korea-body {
  font-size: 17px;
  color: var(--fg-muted);
  max-width: 600px;
  line-height: 1.7;
  margin-bottom: 60px;
}

.korea-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
}

.korea-item {
  background: var(--bg-card);
  padding: 32px;
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.korea-item strong {
  font-size: 15px;
  font-weight: 600;
  color: var(--fg);
}

.korea-item span {
  font-size: 14px;
  color: var(--fg-muted);
  line-height: 1.5;
}

/* CLOSING */
.closing {
  padding: 120px 48px;
  text-align: center;
}

.closing-inner {
  max-width: 760px;
  margin: 0 auto;
}

.closing-headline {
  font-family: 'Syne', sans-serif;
  font-size: clamp(32px, 4vw, 52px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -1.5px;
  margin-bottom: 28px;
}

.closing-body {
  font-size: 18px;
  color: var(--fg-muted);
  line-height: 1.7;
  margin-bottom: 20px;
}

.closing-sub {
  font-size: 16px;
  color: var(--amber);
  font-weight: 500;
}

/* FOOTER */
.footer {
  padding: 48px;
  border-top: 1px solid var(--border);
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-logo {
  font-family: 'Syne', sans-serif;
  font-size: 18px;
  font-weight: 800;
  color: var(--fg);
  margin-bottom: 4px;
}

.footer-tagline {
  font-size: 13px;
  color: var(--fg-muted);
}

.footer-info span {
  font-size: 13px;
  color: var(--fg-muted);
}

/* RESPONSIVE */
@media (max-width: 900px) {
  .hero { padding: 120px 32px 80px; }
  .hero-grid { grid-template-columns: 1fr; gap: 48px; }
  .problem-grid { grid-template-columns: 1fr; }
  .solution-grid { grid-template-columns: 1fr; }
  .results-grid { grid-template-columns: repeat(2, 1fr); }
  .korea-grid { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; gap: 16px; align-items: flex-start; }
  .nav { padding: 0 24px; }
}

@media (max-width: 600px) {
  .hero-headline { font-size: 36px; }
  .results-grid { grid-template-columns: 1fr; }
  .step { grid-template-columns: 48px 1fr; gap: 20px; }
  .problem, .solution, .how, .results, .korea, .closing { padding: 80px 24px; }
}