:root {
  --primary: #10B981;
  --primary-hover: #059669;
  --primary-light: #ECFDF5;
  --primary-dark: #047857;
  --accent-cyan: #06B6D4;
  --accent-cyan-hover: #0891B2;
  --accent-blue: #3B82F6;
  
  --bg-page: #0B0F19;
  --bg-card: #131B2E;
  --bg-card-hover: #1A243B;
  --bg-header: rgba(11, 15, 25, 0.90);
  --bg-footer: #080B12;
  --border-color: #1F2E4D;
  --border-subtle: #18243C;
  
  --text-main: #F1F5F9;
  --text-muted: #94A3B8;
  --text-dim: #64748B;

  --badge-pill-bg: rgba(16, 185, 129, 0.12);
  --badge-pill-border: rgba(16, 185, 129, 0.35);
  --badge-pill-text: #6EE7B7;

  --checkout-notice-bg: rgba(234, 179, 8, 0.12);
  --checkout-notice-border: #EAB308;
  --checkout-notice-text: #FEF08A;
  
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  
  --shadow-sm: 0 2px 4px rgba(0,0,0,0.25);
  --shadow-md: 0 6px 16px rgba(0,0,0,0.35);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.45);
  --shadow-glow: 0 0 35px rgba(16, 185, 129, 0.22);
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --primary: #059669;
    --primary-hover: #047857;
    --primary-light: #ECFDF5;
    --primary-dark: #065F46;
    
    --bg-page: #F8FAFC;
    --bg-card: #FFFFFF;
    --bg-card-hover: #F1F5F9;
    --bg-header: rgba(248, 250, 252, 0.90);
    --bg-footer: #E2E8F0;
    --border-color: #CBD5E1;
    --border-subtle: #E2E8F0;
    
    --text-main: #0F172A;
    --text-muted: #475569;
    --text-dim: #64748B;

    --badge-pill-bg: rgba(5, 150, 105, 0.08);
    --badge-pill-border: rgba(5, 150, 105, 0.25);
    --badge-pill-text: #065F46;

    --checkout-notice-bg: #FEFCE8;
    --checkout-notice-border: #CA8A04;
    --checkout-notice-text: #713F12;

    --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.08);
    --shadow-md: 0 4px 14px -1px rgba(15, 23, 42, 0.09);
    --shadow-lg: 0 12px 32px -4px rgba(15, 23, 42, 0.12);
    --shadow-glow: 0 0 35px rgba(5, 150, 105, 0.15);
  }
}

:root[data-theme="light"] {
  --primary: #059669;
  --primary-hover: #047857;
  --primary-light: #ECFDF5;
  --primary-dark: #065F46;
  
  --bg-page: #F8FAFC;
  --bg-card: #FFFFFF;
  --bg-card-hover: #F1F5F9;
  --bg-header: rgba(248, 250, 252, 0.90);
  --bg-footer: #E2E8F0;
  --border-color: #CBD5E1;
  --border-subtle: #E2E8F0;
  
  --text-main: #0F172A;
  --text-muted: #475569;
  --text-dim: #64748B;

  --badge-pill-bg: rgba(5, 150, 105, 0.08);
  --badge-pill-border: rgba(5, 150, 105, 0.25);
  --badge-pill-text: #065F46;

  --checkout-notice-bg: #FEFCE8;
  --checkout-notice-border: #CA8A04;
  --checkout-notice-text: #713F12;

  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.08);
  --shadow-md: 0 4px 14px -1px rgba(15, 23, 42, 0.09);
  --shadow-lg: 0 12px 32px -4px rgba(15, 23, 42, 0.12);
  --shadow-glow: 0 0 35px rgba(5, 150, 105, 0.15);
}

:root[data-theme="dark"] {
  --primary: #10B981;
  --primary-hover: #059669;
  --primary-light: #ECFDF5;
  --primary-dark: #047857;
  
  --bg-page: #0B0F19;
  --bg-card: #131B2E;
  --bg-card-hover: #1A243B;
  --bg-header: rgba(11, 15, 25, 0.90);
  --bg-footer: #080B12;
  --border-color: #1F2E4D;
  --border-subtle: #18243C;
  
  --text-main: #F1F5F9;
  --text-muted: #94A3B8;
  --text-dim: #64748B;

  --badge-pill-bg: rgba(16, 185, 129, 0.12);
  --badge-pill-border: rgba(16, 185, 129, 0.35);
  --badge-pill-text: #6EE7B7;

  --checkout-notice-bg: rgba(234, 179, 8, 0.12);
  --checkout-notice-border: #EAB308;
  --checkout-notice-text: #FEF08A;

  --shadow-sm: 0 2px 4px rgba(0,0,0,0.25);
  --shadow-md: 0 6px 16px rgba(0,0,0,0.35);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.45);
  --shadow-glow: 0 0 35px rgba(16, 185, 129, 0.22);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: var(--font-sans);
  background-color: var(--bg-page);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-header);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
  padding: 14px 0;
}
.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--text-main);
  text-decoration: none !important;
}
.brand img { width: 34px; height: 34px; }
.nav-links {
  display: flex;
  gap: 22px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a {
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.2s;
}
.nav-links a:hover {
  color: var(--primary);
  text-decoration: none;
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.92rem;
  cursor: pointer;
  transition: all 0.2s ease;
  border: 1px solid transparent;
  text-decoration: none !important;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--accent-cyan));
  color: #FFFFFF !important;
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.32);
}
.btn-primary:hover {
  filter: brightness(1.1);
  transform: translateY(-1px);
}
.btn-outline {
  border-color: var(--border-color);
  background: var(--bg-card);
  color: var(--text-main);
}
.btn-outline:hover {
  background: var(--bg-card-hover);
  border-color: var(--primary);
}
.btn-large {
  padding: 14px 28px;
  font-size: 1.05rem;
  border-radius: var(--radius-lg);
}

/* Theme Toggle */
.theme-toggle-pill {
  position: relative;
  width: 58px;
  height: 30px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 999px;
  cursor: pointer;
  display: flex;
  align-items: center;
  padding: 2px;
  user-select: none;
}
.theme-toggle-icons {
  position: absolute;
  width: 100%;
  left: 0;
  display: flex;
  justify-content: space-between;
  padding: 0 6px;
  box-sizing: border-box;
  font-size: 13px;
  pointer-events: none;
}
.theme-toggle-slider {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--primary);
  transition: transform 0.25s ease;
  z-index: 2;
}
:root[data-theme="light"] .theme-toggle-slider {
  transform: translateX(28px);
}

/* Hero Section */
.hero {
  padding: 60px 20px 30px;
  text-align: center;
}
.badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--badge-pill-bg);
  border: 1px solid var(--badge-pill-border);
  color: var(--badge-pill-text);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 20px;
}
.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--primary);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 7px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}
h1 {
  font-size: 2.8rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin: 0 0 20px;
}
.gradient {
  background: linear-gradient(135deg, #10B981, #06B6D4, #3B82F6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-muted);
  max-width: 720px;
  margin: 0 auto 30px;
}
.hero-cta {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}
.hero-trust-row {
  display: flex;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
  color: var(--text-dim);
  font-size: 0.9rem;
}

/* ========================================================
   FLAGSHIP INTERACTIVE APP MOCKUP WINDOW
   ======================================================== */
.interactive-mockup {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  margin: 40px auto;
  max-width: 960px;
  text-align: left;
}
.mockup-window-bar {
  background: rgba(0, 0, 0, 0.25);
  border-bottom: 1px solid var(--border-subtle);
  padding: 12px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.window-dots {
  display: flex;
  gap: 7px;
}
.window-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}
.dot-red { background: #EF4444; }
.dot-yellow { background: #F59E0B; }
.dot-green { background: #10B981; }

.window-title {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}
.demo-mode-tabs {
  display: flex;
  gap: 6px;
  background: var(--bg-page);
  padding: 3px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
}
.demo-tab-btn {
  background: transparent;
  border: 0;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}
.demo-tab-btn:hover {
  color: var(--text-main);
}
.demo-tab-btn.active {
  background: var(--bg-card);
  color: var(--primary);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
}

.mockup-body {
  padding: 28px;
  min-height: 400px;
  position: relative;
}

/* Tab 1: Camera AI Eye Tracker Simulation */
.camera-stage {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 28px;
  align-items: center;
}
@media (max-width: 768px) {
  .camera-stage { grid-template-columns: 1fr; }
}
.camera-viewfinder {
  background: #000000;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: inset 0 0 30px rgba(0, 0, 0, 0.8);
}
.camera-badge {
  position: absolute;
  top: 12px;
  left: 14px;
  background: rgba(16, 185, 129, 0.2);
  border: 1px solid var(--primary);
  color: var(--primary);
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 6px;
}
.camera-privacy-tag {
  position: absolute;
  bottom: 12px;
  left: 14px;
  font-size: 0.72rem;
  color: #94A3B8;
  display: flex;
  align-items: center;
  gap: 5px;
}
.simulated-eye-wrap {
  width: 220px;
  height: 140px;
  margin: 20px auto 10px;
  position: relative;
}
.eye-svg {
  width: 100%;
  height: 100%;
}
.eye-lid {
  transform-origin: center;
  transition: transform 0.08s ease-in-out;
}
.ear-meter-group {
  margin-top: 18px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-md);
  padding: 12px;
}
.ear-label-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.82rem;
  margin-bottom: 6px;
  color: #CBD5E1;
}
.ear-bar-track {
  width: 100%;
  height: 8px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 999px;
  overflow: hidden;
}
.ear-bar-fill {
  height: 100%;
  width: 85%;
  background: linear-gradient(90deg, #10B981, #06B6D4);
  border-radius: 999px;
  transition: width 0.12s ease;
}

.camera-controls {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.stat-pill-card {
  background: var(--bg-page);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.stat-pill-val {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary);
}
.btn-interactive-blink {
  background: linear-gradient(135deg, var(--primary), var(--accent-cyan));
  color: white;
  border: 0;
  border-radius: var(--radius-md);
  padding: 15px 22px;
  font-weight: 700;
  font-size: 1.05rem;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(16, 185, 129, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: transform 0.15s, filter 0.15s;
}
.btn-interactive-blink:hover {
  transform: translateY(-2px);
  filter: brightness(1.1);
}
.btn-interactive-blink:active {
  transform: translateY(1px);
}

/* Tab 2: 20-20-20 Break Simulator */
.break-simulator-box {
  text-align: center;
  padding: 30px 20px;
}
.break-circle-widget {
  width: 160px;
  height: 160px;
  margin: 0 auto 20px;
  border-radius: 50%;
  border: 4px solid var(--border-color);
  border-top-color: var(--primary);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  background: var(--bg-page);
}
.break-circle-num {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--primary);
}

/* Fullscreen / modal preview overlay for 20-20-20 */
.break-demo-overlay {
  display: none;
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(11, 15, 25, 0.94);
  backdrop-filter: blur(16px);
  z-index: 50;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 30px;
}
.break-demo-overlay.active {
  display: flex;
  animation: fadeIn 0.3s ease;
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.breathing-ring {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  background: rgba(16, 185, 129, 0.15);
  border: 3px solid var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  animation: breathe 5s infinite ease-in-out;
}
@keyframes breathe {
  0%, 100% { transform: scale(1); box-shadow: 0 0 20px rgba(16, 185, 129, 0.2); }
  50% { transform: scale(1.3); box-shadow: 0 0 40px rgba(6, 182, 212, 0.5); }
}
.break-progress-bar-wrap {
  width: 280px;
  height: 6px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 999px;
  overflow: hidden;
  margin: 16px auto;
}
.break-progress-bar {
  width: 100%;
  height: 100%;
  background: var(--primary);
  transition: width 1s linear;
}

/* Tab 3: Eye Gym Infinity */
.eyegym-stage {
  text-align: center;
  padding: 10px 0;
}
.infinity-svg-container {
  width: 320px;
  height: 180px;
  margin: 0 auto 20px;
  background: var(--bg-page);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 10px;
}

/* Tab 4: Notifications & Sounds */
.notify-stage {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
@media (max-width: 680px) {
  .notify-stage { grid-template-columns: 1fr; }
}
.notify-preview-box {
  background: var(--bg-page);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  height: 200px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  position: relative;
  transition: all 0.3s ease;
}
.notify-preview-box.style-glow {
  box-shadow: inset 0 0 30px rgba(16, 185, 129, 0.6), 0 0 25px rgba(16, 185, 129, 0.4);
  border-color: var(--primary);
}
.notify-preview-box.style-bubble {
  border-color: var(--accent-cyan);
}
.notify-floating-bubble {
  display: none;
  background: rgba(16, 185, 129, 0.95);
  color: white;
  padding: 10px 18px;
  border-radius: 999px;
  font-weight: 700;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}
.notify-preview-box.style-bubble .notify-floating-bubble {
  display: block;
}

/* ========================================================
   INTERACTIVE FATIGUE CALCULATOR SECTION
   ======================================================== */
.calculator-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 40px;
  margin: 50px auto;
  max-width: 860px;
  box-shadow: var(--shadow-md);
}
.calc-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 36px;
  align-items: center;
}
@media (max-width: 768px) {
  .calc-grid { grid-template-columns: 1fr; }
}
.slider-wrap {
  margin: 20px 0;
}
.range-slider {
  width: 100%;
  accent-color: var(--primary);
  height: 8px;
  cursor: pointer;
}
.symptoms-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 18px;
}
.calc-result-card {
  background: var(--bg-page);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  text-align: center;
}
.calc-deficit-num {
  font-size: 2.2rem;
  font-weight: 800;
  color: #EF4444;
  margin: 10px 0 4px;
}
.calc-meter-track {
  width: 100%;
  height: 10px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 999px;
  overflow: hidden;
  margin: 14px 0;
}
.calc-meter-fill {
  height: 100%;
  background: linear-gradient(90deg, #10B981, #EAB308, #EF4444);
  transition: width 0.3s ease;
}

/* ========================================================
   BEFORE & AFTER VISUAL COMPARISON SECTION
   ======================================================== */
.comparison-container {
  max-width: 880px;
  margin: 50px auto;
}
.comp-switcher {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 24px;
}
.comp-toggle-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  padding: 10px 22px;
  border-radius: 999px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
}
.comp-toggle-btn.active {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}
.comp-card {
  background: var(--bg-card);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 36px;
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 32px;
  align-items: center;
}
@media (max-width: 680px) {
  .comp-card { grid-template-columns: 1fr; text-align: center; }
}
.comp-card.bad { border-color: rgba(239, 68, 68, 0.4); }
.comp-card.good { border-color: rgba(16, 185, 129, 0.4); }

/* Feature Cards Grid */
.features-section { padding: 60px 0; }
.section-title {
  text-align: center;
  font-size: 2.1rem;
  font-weight: 800;
  margin-bottom: 12px;
}
.section-subtitle {
  text-align: center;
  color: var(--text-muted);
  max-width: 640px;
  margin: 0 auto 40px;
  font-size: 1.05rem;
}
.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: 30px;
  transition: transform 0.2s, border-color 0.2s;
}
.feature-card:hover {
  transform: translateY(-3px);
  border-color: var(--primary);
}
.feature-icon {
  font-size: 2.2rem;
  margin-bottom: 16px;
  display: inline-block;
}
.feature-card h3 { margin: 0 0 10px; font-size: 1.25rem; }
.feature-card p { margin: 0; color: var(--text-muted); font-size: 0.95rem; }

/* Pricing Grid */
.pricing-section { padding: 60px 0; }
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  margin-top: 36px;
}
.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  position: relative;
}
.pricing-card.featured {
  border-color: var(--primary);
  box-shadow: var(--shadow-glow);
}
.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--primary), var(--accent-cyan));
  color: white;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
}
.price-value {
  font-size: 2.4rem;
  font-weight: 800;
  margin: 16px 0 6px;
  color: var(--text-main);
}
.price-period { font-size: 0.9rem; color: var(--text-muted); }
.pricing-features {
  list-style: none;
  padding: 0;
  margin: 24px 0;
  flex: 1;
}
.pricing-features li {
  padding: 8px 0;
  font-size: 0.9rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}
.pricing-features li.included { color: var(--text-main); }
.pricing-features li::before {
  content: "✕";
  color: var(--text-dim);
  font-weight: bold;
}
.pricing-features li.included::before {
  content: "✓";
  color: var(--primary);
}

/* Downloads Section */
.download-section { padding: 60px 0; text-align: center; }
.download-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 40px;
  max-width: 780px;
  margin: 0 auto;
}
.download-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 24px;
}
@media (max-width: 640px) {
  .download-options { grid-template-columns: 1fr; }
}
.download-item {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  background: var(--bg-page);
  text-align: center;
}
.hash-info {
  margin-top: 10px;
  font-family: monospace;
  font-size: 0.75rem;
  color: var(--text-dim);
  word-break: break-all;
}

/* Checkout Page */
.checkout-wrap {
  max-width: 680px;
  margin: 40px auto 60px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 36px;
  box-shadow: var(--shadow-lg);
}
.checkout-header { text-align: center; margin-bottom: 28px; }
.checkout-notice {
  background: var(--checkout-notice-bg);
  border: 1px solid var(--checkout-notice-border);
  color: var(--checkout-notice-text);
  padding: 14px 18px;
  border-radius: var(--radius-md);
  font-weight: 600;
  margin-bottom: 24px;
  text-align: center;
}
.plan-selector {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 24px;
}
@media (max-width: 600px) {
  .plan-selector { grid-template-columns: 1fr; }
}
.plan-opt {
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 18px;
  cursor: pointer;
  transition: all 0.2s;
  position: relative;
  background: var(--bg-page);
}
.plan-opt input[type="radio"] { position: absolute; top: 16px; right: 16px; }
.plan-opt.selected {
  border-color: var(--primary);
  background: var(--badge-pill-bg);
}
.opt-title { font-weight: 700; font-size: 1.05rem; margin-bottom: 6px; }
.opt-price { font-size: 1.4rem; font-weight: 800; color: var(--primary); }
.opt-discount {
  display: inline-block;
  margin-top: 6px;
  font-size: 0.78rem;
  background: rgba(16, 185, 129, 0.2);
  color: var(--primary);
  padding: 2px 8px;
  border-radius: 999px;
  font-weight: 600;
}
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 8px;
  font-size: 0.95rem;
}
.form-input {
  width: 100%;
  padding: 12px 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background: var(--bg-page);
  color: var(--text-main);
  font-size: 1rem;
}
.form-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
}
.form-check {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 14px;
  cursor: pointer;
}
.form-check input { margin-top: 4px; accent-color: var(--primary); }
.security-note {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 18px;
  font-size: 0.82rem;
  color: var(--text-dim);
}

/* Doc Pages */
.doc-page {
  max-width: 800px;
  margin: 40px auto 70px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 40px;
}
.doc-date {
  color: var(--text-dim);
  font-size: 0.88rem;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 14px;
}
.doc-content h2 { margin-top: 28px; font-size: 1.3rem; }
.doc-content p, .doc-content li { color: var(--text-muted); }

/* Footer */
.site-footer {
  border-top: 1px solid var(--border-subtle);
  background: var(--bg-footer);
  padding: 32px 0;
  color: var(--text-dim);
  font-size: 0.88rem;
  margin-top: 60px;
}
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}
.footer-links { display: flex; gap: 18px; flex-wrap: wrap; }
.footer-links a { color: var(--text-dim); }
.footer-links a:hover { color: var(--text-main); }


/* Language Switcher */
.lang-selector-wrap {
  display: flex;
  align-items: center;
}
.lang-switcher select {
  background: var(--bg-card);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 6px 10px;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  outline: none;
  transition: all 0.2s ease;
}
.lang-switcher select:hover {
  border-color: var(--primary);
}

/* Payment Method Selector in Checkout */
.payment-method-selector {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 20px;
}
.method-opt {
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 14px;
  cursor: pointer;
  transition: all 0.2s ease;
}
.method-opt:hover {
  border-color: var(--primary);
  background: var(--bg-card-hover);
}
.method-opt.selected {
  border: 2px solid var(--primary);
  background: var(--bg-card-hover);
  box-shadow: 0 0 16px rgba(16, 185, 129, 0.15);
}
.method-opt label {
  margin: 0;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 12px;
}
.method-opt input[type="radio"] {
  accent-color: var(--primary);
  width: 18px;
  height: 18px;
  cursor: pointer;
}

/* B2B / Enterprise Section */
.b2b-section {
  padding: 60px 0;
  border-top: 1px solid var(--border-subtle);
}
.b2b-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
  margin-top: 36px;
}
.b2b-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: all 0.25s ease;
}
.b2b-card:hover {
  transform: translateY(-3px);
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}
.b2b-card .b2b-icon {
  font-size: 2rem;
  margin-bottom: 12px;
  display: inline-block;
}
.b2b-card h3 {
  margin: 0 0 8px 0;
  font-size: 1.15rem;
  color: var(--text-main);
}
.b2b-card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.5;
}
.b2b-cta-card {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.08) 0%, rgba(6, 182, 212, 0.08) 100%);
  border: 1px solid var(--primary);
  border-radius: var(--radius-xl);
  padding: 36px;
  text-align: center;
  margin-top: 40px;
}
.b2b-cta-card h3 {
  margin: 0 0 10px 0;
  font-size: 1.4rem;
  color: var(--text-main);
}
.b2b-cta-card p {
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto 24px auto;
  font-size: 0.95rem;
}