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

:root {
  --bg-primary: #0a0a1a;
  --bg-secondary: #111128;
  --bg-card: #1a1a2e;
  --bg-card-hover: #222240;
  --text-primary: #f0f0f5;
  --text-secondary: #a0a0b8;
  --text-muted: #6a6a80;
  --accent: #4f8cff;
  --accent-hover: #6ba0ff;
  --accent-glow: rgba(79, 140, 255, 0.25);
  --border: rgba(255, 255, 255, 0.08);
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 20px;
  --nav-height: 64px;
  --transition: 0.3s ease;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

body {
  font-family: 'Pretendard Variable', Pretendard, -apple-system, BlinkMacSystemFont, 'Malgun Gothic', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--accent-hover);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

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

/* ===== Navigation ===== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 1000;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  background: rgba(10, 10, 26, 0.8);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}

.nav.scrolled {
  background: rgba(10, 10, 26, 0.95);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-primary);
  font-weight: 700;
  font-size: 18px;
}

.nav-logo:hover {
  color: var(--text-primary);
}

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

.nav-links {
  display: flex;
  list-style: none;
  gap: 32px;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 15px;
  font-weight: 500;
  transition: color var(--transition);
}

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

.nav-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.lang-dropdown {
  position: relative;
}

.lang-current {
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 13px;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: 8px;
  cursor: pointer;
  transition: all var(--transition);
}

.lang-current:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
  border-color: rgba(255, 255, 255, 0.15);
}

.lang-chevron {
  transition: transform var(--transition);
}

.lang-dropdown.open .lang-chevron {
  transform: rotate(180deg);
}

.lang-menu {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  min-width: 120px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 4px;
  list-style: none;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all 0.2s ease;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

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

.lang-option {
  display: block;
  width: 100%;
  padding: 8px 14px;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 13px;
  font-weight: 500;
  text-align: left;
  border-radius: 6px;
  cursor: pointer;
  transition: all var(--transition);
}

.lang-option:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-primary);
}

.lang-option.active {
  color: var(--accent);
  font-weight: 700;
}

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

.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  border: none;
  white-space: nowrap;
}

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

.btn-primary:hover {
  background: var(--accent-hover);
  color: #fff;
  box-shadow: 0 0 24px var(--accent-glow);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  border-color: rgba(255, 255, 255, 0.15);
}

.btn-lg {
  padding: 16px 32px;
  font-size: 16px;
  border-radius: var(--radius);
}

.btn-block {
  width: 100%;
}

.btn-disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--nav-height);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% 0%, rgba(79, 140, 255, 0.12) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 80% 20%, rgba(100, 60, 255, 0.08) 0%, transparent 50%);
  pointer-events: none;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 60px;
  align-items: center;
  padding-top: 40px;
  padding-bottom: 60px;
}

.hero-logo {
  border-radius: 20px;
  margin-bottom: 24px;
  box-shadow: 0 8px 32px rgba(79, 140, 255, 0.2);
}

.hero h1 {
  font-size: 48px;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.5px;
  margin-bottom: 12px;
}

.hero-subtitle {
  font-size: 24px;
  color: var(--text-secondary);
  margin-bottom: 16px;
  line-height: 1.5;
}

.hero-subtitle strong {
  color: var(--accent);
}

.hero-desc {
  font-size: 16px;
  color: var(--text-muted);
  margin-bottom: 32px;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.hero-note {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 16px;
}

.hero-image {
  position: relative;
}

.hero-image-frame {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow:
    0 20px 60px rgba(0, 0, 0, 0.5),
    0 0 80px rgba(79, 140, 255, 0.08);
}

.hero-image-frame img {
  width: 100%;
  display: block;
}

/* ===== Sections ===== */
.section {
  padding: 100px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-header h2 {
  font-size: 36px;
  font-weight: 800;
  margin-bottom: 12px;
}

.section-header p {
  font-size: 17px;
  color: var(--text-secondary);
}

/* ===== Features ===== */
.features {
  background: var(--bg-secondary);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 24px;
  transition: all var(--transition);
}

.feature-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(79, 140, 255, 0.2);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.feature-icon {
  font-size: 32px;
  margin-bottom: 16px;
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===== Gallery ===== */
.gallery-showcase {
  max-width: 960px;
  margin: 0 auto;
}

.gallery-main {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

.gallery-main img {
  width: 100%;
}

.gallery-caption {
  text-align: center;
  margin-top: 24px;
}

.gallery-caption h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 8px;
}

.gallery-caption p {
  font-size: 15px;
  color: var(--text-secondary);
}

/* ===== Pricing ===== */
.pricing {
  background: var(--bg-secondary);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
  max-width: 720px;
  margin: 0 auto;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  position: relative;
  transition: all var(--transition);
}

.pricing-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.pricing-card-pro {
  border-color: var(--accent);
  box-shadow: 0 0 40px var(--accent-glow);
}

.pricing-badge {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 700;
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.pricing-badge-pro {
  background: var(--accent);
  color: #fff;
}

.pricing-card h3 {
  font-size: 24px;
  font-weight: 800;
  margin-bottom: 8px;
}

.pricing-price {
  margin-bottom: 28px;
}

.price-amount {
  font-size: 36px;
  font-weight: 800;
}

.price-period {
  display: block;
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 4px;
}

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

.pricing-features li {
  padding: 8px 0;
  font-size: 14px;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
}

.pricing-features li:last-child {
  border-bottom: none;
}

.pricing-features li::before {
  content: '✓';
  color: var(--accent);
  font-weight: 700;
  margin-right: 8px;
}

/* ===== Download ===== */
.download-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  max-width: 900px;
  margin: 0 auto;
}

.download-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 28px;
  text-align: center;
  transition: all var(--transition);
}

.download-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.download-icon {
  color: var(--accent);
  margin-bottom: 20px;
}

.download-card h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 8px;
}

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

.download-info {
  font-size: 13px !important;
  color: var(--text-muted) !important;
  margin-bottom: 20px;
}

.download-card-coming {
  opacity: 0.6;
}

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

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 15px;
}

.footer-brand img {
  border-radius: 6px;
}

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

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

.footer-links a {
  font-size: 14px;
  color: var(--text-secondary);
}

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

/* ===== Toast ===== */
.toast {
  position: fixed;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border);
  padding: 14px 32px;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  z-index: 9999;
  opacity: 0;
  transition: all 0.3s ease;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  pointer-events: none;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ===== Scroll Animation ===== */
[data-animate] {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-animate].visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== Responsive ===== */
@media (max-width: 968px) {
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 40px;
  }

  .hero-logo {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-actions {
    justify-content: center;
  }

  .hero h1 {
    font-size: 36px;
  }

  .hero-subtitle {
    font-size: 20px;
  }

  .section-header h2 {
    font-size: 28px;
  }
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: rgba(10, 10, 26, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: center;
    gap: 0;
    padding: 16px 0;
    border-bottom: 1px solid var(--border);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: all var(--transition);
  }

  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }

  .nav-links li {
    width: 100%;
    text-align: center;
  }

  .nav-links a {
    display: block;
    padding: 14px 24px;
    font-size: 16px;
  }

  .hero {
    min-height: auto;
    padding-top: calc(var(--nav-height) + 40px);
    padding-bottom: 40px;
  }

  .hero h1 {
    font-size: 28px;
  }

  .hero-subtitle {
    font-size: 18px;
  }

  .hero-desc br {
    display: none;
  }

  .section {
    padding: 60px 0;
  }

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

  .pricing-grid {
    grid-template-columns: 1fr;
  }

  .download-grid {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 24px;
  }

  .hero-subtitle {
    font-size: 16px;
  }

  .btn-lg {
    padding: 14px 24px;
    font-size: 15px;
  }

  .hero-actions {
    flex-direction: column;
  }
}