/* ==========================================================================
   Auto_Program Design System & Global Styles
   Modern Dark Aesthetic with Glassmorphism, Vibrant Gradients & Micro-interactions
   ========================================================================== */

@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard/dist/web/static/pretendard.css');

:root {
  /* Color Palette */
  --bg-primary: #0a0d14;
  --bg-secondary: #101522;
  --bg-tertiary: #161c2d;
  --bg-card: rgba(22, 28, 45, 0.7);
  --bg-card-hover: rgba(30, 39, 63, 0.85);
  
  --border-color: rgba(255, 255, 255, 0.08);
  --border-highlight: rgba(99, 102, 241, 0.3);
  --border-active: rgba(139, 92, 246, 0.6);

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-highlight: #38bdf8;

  /* Vibrant Accents */
  --primary-500: #6366f1;
  --primary-600: #4f46e5;
  --accent-purple: #8b5cf6;
  --accent-cyan: #06b6d4;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;
  --accent-rose: #f43f5e;

  /* Gradients */
  --gradient-brand: linear-gradient(135deg, #6366f1 0%, #a855f7 50%, #ec4899 100%);
  --gradient-glow: linear-gradient(135deg, rgba(99, 102, 241, 0.2) 0%, rgba(168, 85, 247, 0.2) 100%);
  --gradient-gold: linear-gradient(135deg, #fbbf24 0%, #f59e0b 50%, #d97706 100%);
  --gradient-card: linear-gradient(180deg, rgba(255, 255, 255, 0.04) 0%, rgba(255, 255, 255, 0.01) 100%);
  --gradient-naver: linear-gradient(135deg, #03c75a 0%, #00a843 100%);
  --gradient-adsense: linear-gradient(135deg, #4285f4 0%, #34a853 50%, #fbbc05 100%);

  /* Effects */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 30px rgba(99, 102, 241, 0.35);
  --shadow-glow-naver: 0 0 25px rgba(3, 199, 90, 0.35);

  /* Layout */
  --container-max: 1200px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  /* Typography */
  --font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, Roboto, 'Helvetica Neue', 'Segoe UI', sans-serif;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.65;
  overflow-x: hidden;
  position: relative;
  -webkit-font-smoothing: antialiased;
}

/* Background Atmosphere */
.bg-ambient {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.ambient-blob-1 {
  position: absolute;
  top: -15%;
  left: 15%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.18) 0%, rgba(0, 0, 0, 0) 70%);
  filter: blur(80px);
  animation: floatBlob 18s ease-in-out infinite alternate;
}

.ambient-blob-2 {
  position: absolute;
  top: 40%;
  right: -10%;
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(168, 85, 247, 0.15) 0%, rgba(0, 0, 0, 0) 70%);
  filter: blur(100px);
  animation: floatBlob 22s ease-in-out infinite alternate-reverse;
}

.ambient-blob-3 {
  position: absolute;
  bottom: -10%;
  left: 20%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.12) 0%, rgba(0, 0, 0, 0) 70%);
  filter: blur(90px);
}

@keyframes floatBlob {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(40px, 30px) scale(1.08); }
  100% { transform: translate(-30px, -20px) scale(0.95); }
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* Typography Utilities */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-primary);
  font-weight: 700;
  line-height: 1.3;
}

.gradient-text {
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.gradient-gold-text {
  background: var(--gradient-gold);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.gradient-naver-text {
  background: var(--gradient-naver);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

/* Navigation Header */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  background: rgba(10, 13, 20, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  transition: all var(--transition-normal);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 800;
  color: #fff;
  text-decoration: none;
  letter-spacing: -0.02em;
}

.logo-badge {
  background: var(--gradient-brand);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  text-transform: uppercase;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color var(--transition-fast);
  position: relative;
  padding: 6px 0;
}

.nav-link:hover, .nav-link.active {
  color: #fff;
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--gradient-brand);
  border-radius: 2px;
}

.nav-dropdown {
  position: relative;
}

.nav-dropdown-menu {
  position: absolute;
  top: 100%;
  left: -20px;
  width: 220px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 10px;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-fast);
  list-style: none;
}

.nav-dropdown:hover .nav-dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-dropdown-item a {
  display: block;
  padding: 8px 12px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.nav-dropdown-item a:hover {
  background: rgba(255, 255, 255, 0.06);
  color: #fff;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

/* Mobile Toggle */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: #fff;
  font-size: 1.5rem;
  cursor: pointer;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-normal);
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-brand);
  color: #fff;
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 22px rgba(99, 102, 241, 0.6);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.07);
  color: var(--text-primary);
  border-color: var(--border-color);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

.btn-gold {
  background: var(--gradient-gold);
  color: #1a1500;
  font-weight: 700;
  box-shadow: 0 4px 15px rgba(245, 158, 11, 0.4);
}

.btn-gold:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 22px rgba(245, 158, 11, 0.6);
}

.btn-kakao {
  background: #FEE500;
  color: #191919;
  font-weight: 700;
}

.btn-kakao:hover {
  background: #FADA0A;
  transform: translateY(-2px);
}

.btn-lg {
  padding: 14px 32px;
  font-size: 1.1rem;
  border-radius: var(--radius-lg);
}

.btn-full {
  width: 100%;
}

/* Badge & Tag */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 600;
  border: 1px solid var(--border-color);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-secondary);
}

.badge-glow {
  border-color: var(--border-highlight);
  background: rgba(99, 102, 241, 0.12);
  color: #a5b4fc;
}

.badge-gold {
  border-color: rgba(245, 158, 11, 0.4);
  background: rgba(245, 158, 11, 0.12);
  color: #fde68a;
}

/* Glass Card */
.glass-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.glass-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
}

.glass-card:hover {
  border-color: var(--border-highlight);
  background: var(--bg-card-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.glass-card.highlight {
  border-color: var(--border-active);
  box-shadow: var(--shadow-glow);
}

/* Section Common */
.section {
  padding: 100px 0;
  position: relative;
  z-index: 1;
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 60px;
}

.section-title {
  font-size: 2.5rem;
  margin-top: 14px;
  margin-bottom: 18px;
  letter-spacing: -0.03em;
}

.section-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* Hero Section */
.hero {
  padding: 160px 0 100px;
  text-align: center;
  position: relative;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 900;
  line-height: 1.22;
  margin: 24px 0;
  letter-spacing: -0.04em;
}

.hero-desc {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 760px;
  margin: 0 auto 36px;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.hero-highlights {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 30px;
  flex-wrap: wrap;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.hero-highlights span {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text-secondary);
}

/* Proof / Testimonial Showcase */
.proof-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
  margin-top: 40px;
}

.proof-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: all var(--transition-normal);
}

.proof-card:hover {
  border-color: rgba(99, 102, 241, 0.4);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.proof-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.proof-user {
  display: flex;
  align-items: center;
  gap: 12px;
}

.proof-avatar {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background: var(--gradient-brand);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
}

.proof-name {
  font-weight: 600;
  font-size: 0.95rem;
}

.proof-date {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.proof-badge {
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.3);
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
}

.proof-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: #fff;
}

.proof-content {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.6;
  margin-bottom: 16px;
}

.proof-stat {
  background: rgba(255, 255, 255, 0.03);
  border: 1px dashed rgba(255, 255, 255, 0.1);
  padding: 12px 16px;
  border-radius: var(--radius-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.9rem;
}

.proof-stat-val {
  font-size: 1.2rem;
  font-weight: 800;
  color: #38bdf8;
}

/* Feature Grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 28px;
}

.feature-card {
  padding: 32px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.feature-icon-wrapper {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: rgba(99, 102, 241, 0.15);
  border: 1px solid rgba(99, 102, 241, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 24px;
}

.feature-title {
  font-size: 1.4rem;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.feature-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 24px;
}

.feature-list {
  list-style: none;
  margin-bottom: 28px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.feature-list li svg {
  flex-shrink: 0;
  margin-top: 4px;
  color: var(--accent-emerald);
}

/* Synergy Diagram / Flow */
.synergy-flow {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  position: relative;
  margin-top: 40px;
}

.synergy-step {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  text-align: center;
  position: relative;
}

.step-number {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-brand);
  color: #fff;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  font-size: 0.85rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Pricing Grid */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 28px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all var(--transition-normal);
}

.pricing-card.popular {
  border-color: var(--accent-purple);
  box-shadow: 0 0 35px rgba(139, 92, 246, 0.3);
  background: linear-gradient(180deg, rgba(30, 27, 75, 0.6) 0%, rgba(22, 28, 45, 0.8) 100%);
  transform: scale(1.03);
}

.popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-brand);
  color: #fff;
  padding: 5px 16px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.pricing-header {
  margin-bottom: 24px;
}

.pricing-plan-name {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.pricing-plan-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.pricing-price-box {
  margin-bottom: 28px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
}

.price-original {
  font-size: 0.95rem;
  color: var(--text-muted);
  text-decoration: line-through;
  margin-bottom: 4px;
}

.price-amount {
  font-size: 2.6rem;
  font-weight: 900;
  color: #fff;
  line-height: 1;
}

.price-period {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.price-discount-tag {
  display: inline-block;
  background: rgba(239, 68, 68, 0.15);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.3);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 700;
  margin-left: 8px;
}

.pricing-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 32px;
  flex-grow: 1;
}

.pricing-features li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.92rem;
  color: var(--text-secondary);
}

.pricing-features li svg {
  flex-shrink: 0;
  margin-top: 3px;
  color: var(--accent-emerald);
}

/* FAQ Accordion */
.faq-grid {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition-fast);
}

.faq-question {
  width: 100%;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: none;
  border: none;
  color: #fff;
  font-size: 1.05rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
}

.faq-icon {
  font-size: 1.2rem;
  transition: transform var(--transition-fast);
}

.faq-item.open .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  padding: 0 24px 20px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
  display: none;
}

.faq-item.open .faq-answer {
  display: block;
}

/* Sticky Floating CTA */
.sticky-cta-bar {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  width: 90%;
  max-width: 800px;
  background: rgba(16, 21, 34, 0.9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-active);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.7), 0 0 25px rgba(99, 102, 241, 0.3);
  border-radius: var(--radius-full);
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  z-index: 99;
  transition: all var(--transition-normal);
}

.sticky-cta-text {
  display: flex;
  align-items: center;
  gap: 12px;
}

.sticky-cta-title {
  font-weight: 700;
  font-size: 0.95rem;
}

.sticky-cta-badge {
  background: var(--gradient-brand);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: var(--radius-full);
}

.sticky-cta-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* Footer */
.footer {
  background: #06080d;
  border-top: 1px solid var(--border-color);
  padding: 70px 0 40px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 40px;
  margin-bottom: 50px;
}

.footer-brand h4 {
  font-size: 1.25rem;
  color: #fff;
  margin-bottom: 14px;
}

.footer-col h5 {
  color: #fff;
  font-size: 0.95rem;
  margin-bottom: 18px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

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

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

.footer-bottom {
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

/* Responsive Media Queries */
@media (max-width: 992px) {
  .hero-title { font-size: 2.8rem; }
  .synergy-flow { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .pricing-card.popular { transform: none; }
}

@media (max-width: 768px) {
  .hero { padding: 130px 0 60px; }
  .hero-title { font-size: 2.2rem; }
  .hero-desc { font-size: 1.05rem; }
  .section { padding: 60px 0; }
  .section-title { font-size: 1.9rem; }
  .nav-menu { display: none; }
  .mobile-toggle { display: block; }
  .sticky-cta-bar {
    border-radius: var(--radius-lg);
    bottom: 12px;
    flex-direction: column;
    gap: 10px;
    padding: 14px 18px;
    text-align: center;
  }
  .sticky-cta-actions { width: 100%; }
  .sticky-cta-actions .btn { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; }
}