:root {
  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Segoe UI", Roboto, "Noto Sans TC", "Noto Sans JP", sans-serif;
  
  /* Color Palette - Light Mode */
  --bg-main: #f8fafc;
  --bg-card: #ffffff;
  --bg-card-subtle: #f1f5f9;
  --bg-glass: rgba(255, 255, 255, 0.82);
  --border-color: #e2e8f0;
  --border-glow: rgba(16, 185, 129, 0.2);
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  
  --primary: #10b981;
  --primary-hover: #059669;
  --primary-light: #ecfdf5;
  --primary-glow: rgba(16, 185, 129, 0.25);
  
  --accent-purple: #8b5cf6;
  --accent-blue: #3b82f6;
  --badge-bg: #ecfdf5;
  --badge-text: #065f46;
  
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 4px 20px -2px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 12px 36px -4px rgba(15, 23, 42, 0.12);
  --shadow-glow: 0 0 25px rgba(16, 185, 129, 0.35);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;
  
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg-main: #0a0e17;
    --bg-card: #121824;
    --bg-card-subtle: #1a2233;
    --bg-glass: rgba(18, 24, 36, 0.85);
    --border-color: #243046;
    --border-glow: rgba(52, 211, 153, 0.25);
    
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #64748b;
    
    --primary: #34d399;
    --primary-hover: #10b981;
    --primary-light: rgba(52, 211, 153, 0.12);
    --primary-glow: rgba(52, 211, 153, 0.3);
    
    --badge-bg: rgba(52, 211, 153, 0.15);
    --badge-text: #6ee7b7;
    
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 6px 24px -2px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 16px 40px -4px rgba(0, 0, 0, 0.6);
  }
}

:root[data-theme="dark"] {
  --bg-main: #0a0e17;
  --bg-card: #121824;
  --bg-card-subtle: #1a2233;
  --bg-glass: rgba(18, 24, 36, 0.85);
  --border-color: #243046;
  --border-glow: rgba(52, 211, 153, 0.25);
  
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #64748b;
  
  --primary: #34d399;
  --primary-hover: #10b981;
  --primary-light: rgba(52, 211, 153, 0.12);
  --primary-glow: rgba(52, 211, 153, 0.3);
  
  --badge-bg: rgba(52, 211, 153, 0.15);
  --badge-text: #6ee7b7;
  
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 6px 24px -2px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 16px 40px -4px rgba(0, 0, 0, 0.6);
}

:root[data-theme="light"] {
  --bg-main: #f8fafc;
  --bg-card: #ffffff;
  --bg-card-subtle: #f1f5f9;
  --bg-glass: rgba(255, 255, 255, 0.82);
  --border-color: #e2e8f0;
  --border-glow: rgba(16, 185, 129, 0.2);
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  
  --primary: #10b981;
  --primary-hover: #059669;
  --primary-light: #ecfdf5;
  --primary-glow: rgba(16, 185, 129, 0.25);
  
  --badge-bg: #ecfdf5;
  --badge-text: #065f46;
  
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 4px 20px -2px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 12px 36px -4px rgba(15, 23, 42, 0.12);
}

/* Base Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

html {
  font-family: var(--font-sans);
  background-color: var(--bg-main);
  color: var(--text-primary);
  scroll-behavior: smooth;
  line-height: 1.6;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  position: relative;
}

/* Ambient Background Blobs */
.ambient-bg {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
  overflow: hidden;
}

.blob-1 {
  position: absolute;
  top: -150px;
  left: 15%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--primary-glow) 0%, rgba(16, 185, 129, 0) 70%);
  filter: blur(60px);
  border-radius: 50%;
  opacity: 0.6;
}

.blob-2 {
  position: absolute;
  top: 400px;
  right: 10%;
  width: 450px;
  height: 450px;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.15) 0%, rgba(139, 92, 246, 0) 70%);
  filter: blur(70px);
  border-radius: 50%;
  opacity: 0.5;
}

/* Navigation */
.navbar {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  background: var(--bg-glass);
  border-bottom: 1px solid var(--border-color);
  transition: all 0.3s ease;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: -0.02em;
}

.brand-icon {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.25);
}

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

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.2s ease;
}

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

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

.btn-icon {
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.1rem;
  transition: all 0.2s ease;
}

.btn-icon:hover {
  border-color: var(--primary);
  transform: translateY(-1px);
}

.btn-lang-toggle {
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 6px 12px;
  border-radius: 10px;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 600;
  transition: all 0.2s ease;
}

.btn-lang-toggle:hover {
  border-color: var(--primary);
}

/* Hero Section */
.hero {
  max-width: 1200px;
  margin: 0 auto;
  padding: 60px 24px 80px;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}

.badge-wrapper {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--badge-bg);
  color: var(--badge-text);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  border: 1px solid var(--border-glow);
  margin-bottom: 24px;
}

.badge-dot {
  width: 8px;
  height: 8px;
  background-color: var(--primary);
  border-radius: 50%;
  display: inline-block;
  box-shadow: 0 0 8px var(--primary);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.15); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

.hero-title {
  font-size: clamp(2.5rem, 5vw, 3.8rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 20px;
}

.text-gradient {
  background: linear-gradient(135deg, var(--primary) 0%, #3b82f6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 32px;
  max-width: 540px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  margin-bottom: 28px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--primary);
  color: #ffffff;
  font-weight: 600;
  font-size: 1rem;
  padding: 14px 28px;
  border-radius: var(--radius-md);
  text-decoration: none;
  box-shadow: 0 6px 20px var(--primary-glow);
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  border: none;
  cursor: pointer;
}

.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--primary-glow);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--bg-card);
  color: var(--text-primary);
  font-weight: 600;
  font-size: 1rem;
  padding: 13px 26px;
  border-radius: var(--radius-md);
  text-decoration: none;
  border: 1px solid var(--border-color);
  transition: all 0.25s ease;
}

.btn-secondary:hover {
  background: var(--bg-card-subtle);
  border-color: var(--primary);
  transform: translateY(-2px);
}

.meta-stats {
  display: flex;
  gap: 24px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.meta-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Hero Showcase Mockup */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.phone-mockup {
  position: relative;
  width: 320px;
  background: #000000;
  border-radius: 40px;
  padding: 10px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.35), 0 0 0 1px rgba(255, 255, 255, 0.1);
}

.phone-screen {
  border-radius: 32px;
  overflow: hidden;
  background: var(--bg-card);
  aspect-ratio: 9 / 18;
}

.phone-screen img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.floating-badge {
  position: absolute;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 10px 16px;
  border-radius: 14px;
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.85rem;
  font-weight: 600;
  backdrop-filter: blur(10px);
}

.badge-quiet {
  top: 15%;
  left: -25px;
}

.badge-boost {
  bottom: 20%;
  right: -25px;
}

/* Features Section */
.features-section {
  padding: 90px 24px;
  background: var(--bg-card-subtle);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

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

.section-header {
  text-align: center;
  max-width: 650px;
  margin: 0 auto 60px;
}

.section-tag {
  color: var(--primary);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 12px;
  display: block;
}

.section-title {
  font-size: clamp(2rem, 3.5vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

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

.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.feature-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Screenshots Gallery */
.screenshots-section {
  padding: 90px 24px;
  max-width: 1200px;
  margin: 0 auto;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.screenshot-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
}

.screenshot-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}

.screenshot-img-wrap {
  aspect-ratio: 9 / 18;
  overflow: hidden;
  background: var(--bg-card-subtle);
  cursor: pointer;
}

.screenshot-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.screenshot-card:hover img {
  transform: scale(1.03);
}

.screenshot-info {
  padding: 16px 20px;
  border-top: 1px solid var(--border-color);
  background: var(--bg-card);
}

.screenshot-info h3 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.screenshot-info p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Solana Highlights Section */
.solana-section {
  padding: 80px 24px;
  background: linear-gradient(180deg, var(--bg-main) 0%, var(--bg-card-subtle) 100%);
  border-top: 1px solid var(--border-color);
}

.solana-card {
  max-width: 1000px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 48px;
  box-shadow: var(--shadow-md);
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: center;
}

.solana-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(139, 92, 246, 0.12);
  color: var(--accent-purple);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.solana-title {
  font-size: 1.9rem;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.solana-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.solana-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.check-icon {
  color: var(--primary);
  font-weight: bold;
}

.banner-img-wrap {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-color);
}

.banner-img-wrap img {
  width: 100%;
  height: auto;
  display: block;
}

/* Privacy Policy Section on Index */
.privacy-section {
  padding: 90px 24px;
  max-width: 900px;
  margin: 0 auto;
}

.privacy-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 44px;
  box-shadow: var(--shadow-sm);
}

.privacy-content h3 {
  font-size: 1.2rem;
  margin: 24px 0 8px;
  color: var(--text-primary);
}

.privacy-content p, .privacy-content ul {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 14px;
}

.privacy-content ul {
  padding-left: 24px;
}

.privacy-badge-group {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin: 20px 0;
}

.privacy-badge {
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-color);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* Download CTA Box */
.download-section {
  padding: 80px 24px;
  background: var(--bg-card-subtle);
  border-top: 1px solid var(--border-color);
}

.download-box {
  max-width: 800px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 2px solid var(--primary);
  border-radius: var(--radius-xl);
  padding: 48px 36px;
  text-align: center;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}

.download-box::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: linear-gradient(90deg, var(--primary), var(--accent-blue));
}

.download-title {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 12px;
}

.download-info {
  color: var(--text-secondary);
  font-size: 1rem;
  margin-bottom: 28px;
}

.hash-container {
  margin-top: 14px;
  display: flex;
  justify-content: center;
}

.hash-btn {
  background: transparent !important;
  border: none !important;
  box-shadow: none !important;
  padding: 4px 6px;
  border-radius: 4px;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  cursor: pointer;
  transition: opacity 0.2s ease, color 0.2s ease;
  max-width: 100%;
  color: var(--text-muted);
  opacity: 0.45;
  font-family: inherit;
  text-align: center;
}

.hash-btn:hover {
  opacity: 0.85;
  background: transparent !important;
  transform: none;
}

.hash-btn:active {
  transform: none;
}

.hash-header {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.65rem;
  font-weight: 400;
  color: inherit;
}

.hash-icon,
.copy-icon {
  stroke: currentColor;
  opacity: 0.8;
  width: 11px;
  height: 11px;
}

.hash-code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.60rem;
  color: inherit;
  word-break: break-all;
  letter-spacing: -0.02em;
}

.hash-btn.copied {
  opacity: 1;
  color: var(--primary);
}

.hash-btn.copied .hash-header {
  color: var(--primary);
}

.hash-btn.copied .hash-icon,
.hash-btn.copied .copy-icon {
  stroke: var(--primary);
}

/* Footer */
.footer {
  background: var(--bg-card);
  border-top: 1px solid var(--border-color);
  padding: 50px 24px 30px;
  margin-top: auto;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

.footer-links {
  display: flex;
  gap: 24px;
  list-style: none;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s;
}

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

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Modal for screenshot zooming */
.modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(8px);
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.modal.active {
  display: flex;
}

.modal-img {
  max-height: 85vh;
  max-width: 90vw;
  border-radius: 20px;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.7);
}

.modal-close {
  position: absolute;
  top: 24px;
  right: 24px;
  background: rgba(255, 255, 255, 0.2);
  color: #ffffff;
  border: none;
  font-size: 1.5rem;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
}

.modal-close:hover {
  background: rgba(255, 255, 255, 0.4);
}

/* Responsive adjustments */
@media (max-width: 960px) {
  .hero {
    grid-template-columns: 1fr;
    text-align: center;
    padding: 40px 20px 60px;
  }
  
  .hero-desc {
    margin-left: auto;
    margin-right: auto;
  }
  
  .hero-actions {
    justify-content: center;
  }
  
  .meta-stats {
    justify-content: center;
  }
  
  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .solana-card {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .solana-list {
    align-items: center;
    text-align: left;
  }
}

@media (max-width: 640px) {
  .nav-menu {
    display: none;
  }
  
  .gallery-grid {
    grid-template-columns: 1fr;
    max-width: 360px;
    margin: 0 auto;
  }
  
  .floating-badge {
    display: none;
  }
}