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

:root {
  --primary: #2c3e5f;
  --primary-light: #3d5a8a;
  --primary-dark: #1a2740;
  --accent: #4a90d9;
  --accent-light: #6ba8e8;
  --bg: #ffffff;
  --bg-alt: #f5f7fb;
  --text: #333333;
  --text-light: #666666;
  --text-muted: #999999;
  --border: #e0e4ec;
  --shadow: 0 4px 20px rgba(44, 62, 95, 0.08);
  --shadow-lg: 0 8px 40px rgba(44, 62, 95, 0.12);
  --radius: 12px;
  --radius-lg: 20px;
  --transition: 0.3s ease;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans KR', 'Noto Sans SC', sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  overflow-x: hidden;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ========== Navigation ========== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: var(--transition);
}

.navbar.scrolled {
  border-bottom-color: var(--border);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}

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

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--primary);
  font-weight: 700;
  font-size: 1.25rem;
}

.nav-logo-img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
}

.nav-links {
  display: flex;
  gap: 32px;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-light);
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition);
}

.nav-links a:hover {
  color: var(--primary);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.lang-switcher {
  display: flex;
  gap: 4px;
  background: var(--bg-alt);
  border-radius: 8px;
  padding: 3px;
}

.lang-btn {
  padding: 6px 12px;
  border: none;
  background: transparent;
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-light);
  cursor: pointer;
  transition: var(--transition);
}

.lang-btn.active {
  background: var(--primary);
  color: #fff;
}

.lang-btn:hover:not(.active) {
  background: var(--border);
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.mobile-menu-btn span {
  width: 24px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: var(--transition);
}

/* ========== Hero ========== */
.hero {
  position: relative;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 50%, var(--accent) 100%);
  padding: 140px 0 120px;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 70% 30%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
}

.hero-container {
  display: flex;
  align-items: center;
  gap: 60px;
  position: relative;
  z-index: 1;
}

.hero-content {
  flex: 1;
}

.hero-title {
  font-size: 2.75rem;
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
  margin-bottom: 20px;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 36px;
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-visual {
  flex-shrink: 0;
}

.phone-mockup {
  width: 260px;
  height: 260px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  animation: float 6s ease-in-out infinite;
}

.hero-app-icon {
  width: 140px;
  height: 140px;
  border-radius: 28px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-16px); }
}

.hero-wave {
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
}

.hero-wave svg {
  display: block;
  width: 100%;
  height: 80px;
}

/* ========== Buttons ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border-radius: 10px;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition);
  cursor: pointer;
  border: 2px solid transparent;
}

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

.btn-primary:hover {
  background: var(--accent-light);
  border-color: var(--accent-light);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(74, 144, 217, 0.3);
}

.btn-outline {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.5);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: #fff;
  transform: translateY(-2px);
}

.btn-light {
  background: #fff;
  color: var(--primary);
}

.btn-light:hover {
  background: var(--bg-alt);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

.btn-light-outline {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.5);
}

.btn-light-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: #fff;
  transform: translateY(-2px);
}

.btn-block {
  width: 100%;
}

/* ========== Section Common ========== */
.section-title {
  text-align: center;
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 12px;
}

.section-subtitle {
  text-align: center;
  font-size: 1.05rem;
  color: var(--text-light);
  margin-bottom: 48px;
}

/* ========== Features ========== */
.features {
  padding: 100px 0;
  background: var(--bg);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  padding: 36px 28px;
  border-radius: var(--radius-lg);
  background: var(--bg);
  border: 1px solid var(--border);
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent);
}

.feature-icon {
  width: 52px;
  height: 52px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.feature-icon svg {
  width: 26px;
  height: 26px;
  color: #fff;
}

.feature-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 0.92rem;
  color: var(--text-light);
  line-height: 1.6;
}

/* ========== Platforms ========== */
.platforms {
  padding: 100px 0;
  background: var(--bg-alt);
}

.platforms-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 24px;
}

.platform-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 32px 16px;
  background: var(--bg);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  transition: var(--transition);
}

.platform-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.platform-card span {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text);
}

.platform-logo {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.2rem;
  color: #fff;
}

.platform-logo.naver { background: #03c75a; }
.platform-logo.coupang { background: #e44232; }
.platform-logo.elevst { background: #ff0038; font-size: 1rem; }
.platform-logo.lotte { background: #e60012; }
.platform-logo.esm { background: #003ea5; }
.platform-logo.wemake { background: #ff6b35; }

/* ========== How It Works ========== */
.how-it-works {
  padding: 100px 0;
  background: var(--bg);
}

.steps-grid {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
}

.step-card {
  flex: 1;
  max-width: 300px;
  text-align: center;
  padding: 40px 24px;
  border-radius: var(--radius-lg);
  background: var(--bg-alt);
  position: relative;
}

.step-number {
  position: absolute;
  top: -16px;
  left: 50%;
  transform: translateX(-50%);
  width: 36px;
  height: 36px;
  background: var(--accent);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
}

.step-icon {
  width: 64px;
  height: 64px;
  margin: 16px auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step-icon svg {
  width: 48px;
  height: 48px;
  color: var(--primary);
}

.step-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 10px;
}

.step-card p {
  font-size: 0.9rem;
  color: var(--text-light);
  line-height: 1.6;
}

.step-arrow {
  flex-shrink: 0;
}

.step-arrow svg {
  width: 32px;
  height: 32px;
  color: var(--accent);
}

/* ========== Pricing ========== */
.pricing {
  padding: 100px 0;
  background: var(--bg-alt);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
  max-width: 800px;
  margin: 0 auto;
}

.pricing-card {
  padding: 40px 32px;
  border-radius: var(--radius-lg);
  background: var(--bg);
  border: 2px solid var(--border);
  position: relative;
  transition: var(--transition);
}

.pricing-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.pricing-card-featured {
  border-color: var(--accent);
}

.pricing-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  color: #fff;
  padding: 4px 20px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
}

.pricing-header {
  text-align: center;
  margin-bottom: 28px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}

.pricing-header h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 12px;
}

.pricing-price {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 2px;
}

.price-currency {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--primary);
}

.price-amount {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--primary);
}

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

.pricing-features {
  list-style: none;
  margin-bottom: 32px;
}

.pricing-features li {
  padding: 10px 0;
  font-size: 0.95rem;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 10px;
}

.pricing-features li.disabled {
  color: var(--text-muted);
}

.check {
  color: var(--accent);
  font-weight: 700;
  font-size: 1.1rem;
}

.cross {
  color: var(--text-muted);
  font-size: 1.1rem;
}

/* ========== About ========== */
.about {
  padding: 100px 0;
  background: var(--bg);
}

.about-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 48px;
  align-items: start;
}

.about-company-name {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 16px;
}

.about-desc {
  font-size: 0.95rem;
  color: var(--text-light);
  line-height: 1.7;
  margin-bottom: 28px;
}

.about-details {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.about-detail-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.about-detail-icon {
  width: 36px;
  height: 36px;
  min-width: 36px;
  background: var(--bg-alt);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.about-detail-icon svg {
  width: 18px;
  height: 18px;
  color: var(--accent);
}

.about-detail-label {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 2px;
}

.about-detail-value {
  display: block;
  font-size: 0.9rem;
  color: var(--text);
  font-weight: 500;
}

.about-highlights {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.about-highlight-card {
  background: var(--bg-alt);
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  border: 1px solid var(--border);
  transition: var(--transition);
}

.about-highlight-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.about-highlight-number {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--accent);
  margin-bottom: 6px;
}

.about-highlight-text {
  font-size: 0.85rem;
  color: var(--text-light);
  font-weight: 500;
}

/* ========== Footer Company ========== */
.footer-company {
  text-align: center;
  padding: 16px 0;
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.5);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

/* ========== CTA ========== */
.cta {
  padding: 80px 0;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  text-align: center;
}

.cta h2 {
  font-size: 2rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
}

.cta p {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 32px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.cta .hero-buttons {
  justify-content: center;
}

/* ========== Footer ========== */
.footer {
  padding: 48px 0 24px;
  background: var(--primary-dark);
  color: rgba(255, 255, 255, 0.7);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer-logo {
  width: 32px;
  height: 32px;
  border-radius: 8px;
}

.footer-name {
  font-weight: 700;
  color: #fff;
  font-size: 1.1rem;
}

.footer-tagline {
  font-size: 0.85rem;
  margin-left: 8px;
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  font-size: 0.9rem;
  transition: var(--transition);
}

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

.footer-bottom {
  text-align: center;
  padding-top: 24px;
  font-size: 0.85rem;
}

/* ========== Animations ========== */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ========== Responsive ========== */
@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .platforms-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    padding: 20px 24px;
    gap: 16px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
  }

  .nav-links.active {
    display: flex;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .lang-switcher {
    gap: 2px;
  }

  .lang-btn {
    padding: 4px 8px;
    font-size: 0.75rem;
  }

  .hero {
    padding: 120px 0 100px;
  }

  .hero-container {
    flex-direction: column;
    text-align: center;
  }

  .hero-title {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .hero-buttons {
    justify-content: center;
    flex-direction: column;
    align-items: center;
  }

  .phone-mockup {
    width: 180px;
    height: 180px;
  }

  .hero-app-icon {
    width: 100px;
    height: 100px;
  }

  .features-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .platforms-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }

  .steps-grid {
    flex-direction: column;
    gap: 24px;
  }

  .step-arrow {
    transform: rotate(90deg);
  }

  .step-card {
    max-width: 100%;
  }

  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 400px;
  }

  .section-title {
    font-size: 1.6rem;
  }

  .footer-content {
    flex-direction: column;
    gap: 20px;
    text-align: center;
  }

  .footer-brand {
    flex-direction: column;
  }

  .footer-links {
    flex-direction: column;
    gap: 12px;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .about-highlights {
    grid-template-columns: repeat(2, 1fr);
  }

  .cta h2 {
    font-size: 1.5rem;
  }
}

@media (max-width: 480px) {
  .platforms-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .hero-title {
    font-size: 1.7rem;
  }

  .btn {
    padding: 12px 20px;
    font-size: 0.9rem;
  }
}