/* Global Styles & Variables */
:root {
  --bg-primary: #0a0f1d;
  --bg-secondary: #111827;
  --bg-card: rgba(17, 24, 39, 0.7);
  --border-color: rgba(255, 255, 255, 0.1);
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --accent: #f97316;
  --accent-hover: #ea580c;
  --accent-gradient: linear-gradient(135deg, #f97316 0%, #fb923c 50%, #facc15 100%);
  --font-family: 'Plus Jakarta Sans', 'Noto Sans KR', system-ui, sans-serif;
}

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

body {
  font-family: var(--font-family);
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
}

.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Typography */
h1, h2, h3 {
  color: #ffffff;
  line-height: 1.25;
}

.gradient-text {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 15, 29, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  padding: 18px 0;
}

.nav-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 20px;
  font-weight: 700;
  color: #fff;
}

.logo-icon {
  font-size: 22px;
}

.nav-links {
  display: flex;
  gap: 28px;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: color 0.2s ease;
}

.nav-links a:hover {
  color: #fff;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 600;
  border-radius: 8px;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s ease;
  border: none;
}

.btn-primary {
  background: var(--accent);
  color: #ffffff;
}

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.15);
}

.btn-lg {
  padding: 14px 28px;
  font-size: 16px;
}

/* Hero Section */
.hero {
  padding: 90px 0 60px;
  text-align: center;
  position: relative;
}

.badge {
  display: inline-block;
  padding: 6px 14px;
  font-size: 12px;
  font-weight: 600;
  color: #fb923c;
  background: rgba(249, 115, 22, 0.1);
  border: 1px solid rgba(249, 115, 22, 0.25);
  border-radius: 999px;
  margin-bottom: 24px;
}

.hero-title {
  font-size: 48px;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.hero-subtitle {
  font-size: 18px;
  color: var(--text-muted);
  max-width: 640px;
  margin: 0 auto 36px;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 60px;
}

/* Metrics Grid */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  max-width: 800px;
  margin: 0 auto;
}

.metric-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 24px;
}

.metric-value {
  font-size: 32px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 4px;
}

.metric-label {
  font-size: 13px;
  color: var(--text-muted);
}

/* Section styling */
.section {
  padding: 80px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 50px;
}

.section-title {
  font-size: 32px;
  margin-bottom: 12px;
}

.section-desc {
  color: var(--text-muted);
  font-size: 16px;
}

/* Grid 3 */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 32px;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.card:hover {
  transform: translateY(-4px);
  border-color: rgba(249, 115, 22, 0.4);
}

.card-icon {
  font-size: 36px;
  margin-bottom: 16px;
}

.card h3 {
  font-size: 18px;
  margin-bottom: 10px;
}

.card p {
  color: var(--text-muted);
  font-size: 14px;
}

/* Demo Section */
.demo-box {
  background: linear-gradient(180deg, rgba(249, 115, 22, 0.05) 0%, rgba(17, 24, 39, 0.9) 100%);
  border: 1px solid rgba(249, 115, 22, 0.25);
  border-radius: 16px;
  padding: 48px;
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
}

.demo-header h2 {
  font-size: 26px;
  margin-bottom: 8px;
}

.demo-header p {
  color: var(--text-muted);
  font-size: 14px;
  margin-bottom: 28px;
}

.subscribe-form {
  display: flex;
  gap: 12px;
  max-width: 520px;
  margin: 0 auto;
}

.subscribe-form input {
  flex: 1;
  background: rgba(10, 15, 29, 0.8);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 12px 16px;
  color: #fff;
  font-size: 14px;
  outline: none;
}

.subscribe-form input:focus {
  border-color: var(--accent);
}

.response-box {
  margin-top: 24px;
  background: #060911;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 16px;
  text-align: left;
}

.response-title {
  font-size: 12px;
  color: #fb923c;
  margin-bottom: 8px;
  font-weight: 600;
}

.response-box pre {
  font-family: monospace;
  font-size: 13px;
  color: #a7f3d0;
  overflow-x: auto;
}

.hidden {
  display: none;
}

/* Footer */
.footer {
  border-top: 1px solid var(--border-color);
  padding: 32px 0;
  margin-top: 60px;
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 20px;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
}

.footer-links a:hover {
  color: #fff;
}

/* Responsive */
@media (max-width: 768px) {
  .hero-title {
    font-size: 32px;
  }
  .nav-links {
    display: none;
  }
  .grid-3, .metrics-grid {
    grid-template-columns: 1fr;
  }
  .subscribe-form {
    flex-direction: column;
  }
}