/* Modern CSS Reset & Variables */
:root {
  --bg-primary: #0a0a0c;
  --bg-secondary: #121217;
  --accent-color: #6366f1;
  --accent-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
  --text-primary: #f3f4f6;
  --text-secondary: #9ca3af;
  --glass-bg: rgba(255, 255, 255, 0.03);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-blur: blur(16px);
  --card-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  scroll-behavior: smooth;
}

html, body {
  overflow-x: hidden;
  width: 100%;
}

body {
  font-family: 'Nunito', sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  position: relative;
  min-height: 100dvh;
}

/* Ambient glow backgrounds */
.glow-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  pointer-events: none;
  z-index: -1;
}

.glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  z-index: -1;
  opacity: 0.15;
}

.glow-1 {
  width: 400px;
  height: 400px;
  background: #6366f1;
  top: -100px;
  right: -50px;
}

.glow-2 {
  width: 500px;
  height: 500px;
  background: #a855f7;
  bottom: 100px;
  left: -150px;
}

/* Scrollbar Customization */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: #27272a;
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: #3f3f46;
}

/* Glassmorphism utility card */
.glass {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1.5px solid var(--glass-border);
  border-radius: 20px;
  box-shadow: var(--card-shadow);
}

/* Header styling */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 10, 12, 0.7);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--glass-border);
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-primary);
  font-family: 'Nunito', sans-serif;
  font-weight: 800;
  font-size: 22px;
  letter-spacing: -0.5px;
}

.logo-icon {
  color: #6366f1;
  filter: drop-shadow(0 0 8px rgba(99, 102, 241, 0.5));
}

.logo-text {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 24px;
}

.header-links {
  display: flex;
  align-items: center;
  gap: 20px;
}

.lang-switch {
  display: flex;
  align-items: center;
  gap: 4px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--glass-border);
  padding: 3px 6px;
  border-radius: 20px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.lang-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 11px;
  font-weight: 700;
  cursor: pointer;
  padding: 3px 8px;
  border-radius: 12px;
  transition: var(--transition);
}

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

.lang-btn.active {
  background: var(--accent-gradient);
  color: #fff;
  box-shadow: 0 2px 10px rgba(99, 102, 241, 0.3);
}

.lang-divider {
  color: rgba(255, 255, 255, 0.15);
  font-size: 10px;
  user-select: none;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: var(--transition);
}

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

.btn-download-nav {
  padding: 8px 16px;
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.3);
  border-radius: 30px;
  color: #818cf8;
}

.btn-download-nav:hover {
  background: var(--accent-gradient);
  color: white;
  border-color: transparent;
  box-shadow: 0 0 15px rgba(168, 85, 247, 0.4);
}

/* Hero Section */
.hero {
  max-width: 1200px;
  margin: 0 auto;
  padding: 80px 24px 60px 24px;
  text-align: center;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
}

.badge-new-release {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(99, 102, 241, 0.08);
  border: 1px solid rgba(99, 102, 241, 0.2);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
  color: #a5b4fc;
  margin-bottom: 24px;
}

.badge-dot {
  width: 8px;
  height: 8px;
  background: #34d399;
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.9); box-shadow: 0 0 0 0 rgba(52, 211, 153, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(52, 211, 153, 0); }
  100% { transform: scale(0.9); box-shadow: 0 0 0 0 rgba(52, 211, 153, 0); }
}

.hero-title {
  font-family: 'Nunito', sans-serif;
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -1px;
  margin-bottom: 16px;
  background: linear-gradient(to right, #f3f4f6, #9ca3af);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  color: var(--text-secondary);
  font-size: clamp(1rem, 2vw, 1.15rem);
  margin-bottom: 32px;
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
}

/* General button styles */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  font-size: 15px;
  font-weight: 600;
  border-radius: 12px;
  text-decoration: none;
  transition: var(--transition);
  cursor: pointer;
}

.btn-primary {
  background: var(--accent-gradient);
  color: white;
  border: none;
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(99, 102, 241, 0.45);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  border: 1px solid var(--glass-border);
  margin-left: 12px;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

/* Download Section layout */
.download-section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 60px 24px;
}

.section-title {
  font-family: 'Nunito', sans-serif;
  font-size: clamp(1.75rem, 3.5vw, 2.25rem);
  font-weight: 800;
  text-align: center;
  margin-bottom: 8px;
}

.section-subtitle {
  color: var(--text-secondary);
  text-align: center;
  margin-bottom: 40px;
  font-size: 14px;
}

.download-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 32px;
  margin-bottom: 40px;
}

.download-card {
  padding: 32px;
  display: flex;
  flex-direction: column;
  height: 100%;
  transition: var(--transition);
}

.download-card:hover {
  transform: translateY(-5px);
  border-color: rgba(99, 102, 241, 0.25);
}

/* Highlighted device state styling */
.download-card.highlighted {
  border-color: rgba(99, 102, 241, 0.6);
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.05) 0%, rgba(168, 85, 247, 0.05) 100%);
  box-shadow: 0 15px 35px rgba(99, 102, 241, 0.15);
  position: relative;
}

.download-card.highlighted::before {
  content: attr(data-recommended-text);
  position: absolute;
  top: -12px;
  left: 32px;
  background: var(--accent-gradient);
  color: white;
  padding: 4px 12px;
  font-size: 11px;
  font-weight: 700;
  border-radius: 20px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.os-icon {
  font-size: 32px;
  color: var(--accent-color);
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-flex;
}

.os-name {
  font-family: 'Nunito', sans-serif;
  font-size: 22px;
  font-weight: 700;
}

.card-desc {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 28px;
  flex-grow: 1;
}

.download-main-btn-area {
  margin-bottom: 24px;
}

.btn-download-main {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 16px 24px;
  background: var(--accent-gradient);
  color: white;
  text-decoration: none;
  border-radius: 14px;
  font-weight: 700;
  font-size: 16px;
  text-align: center;
  transition: var(--transition);
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.2);
}

.btn-download-main:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(99, 102, 241, 0.35);
}

.btn-subtext {
  font-size: 11px;
  font-weight: 400;
  opacity: 0.8;
  margin-top: 4px;
}

.other-formats {
  border-top: 1px solid var(--glass-border);
  padding-top: 20px;
}

.other-title {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  display: block;
  margin-bottom: 12px;
}

.format-buttons {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.btn-format {
  display: block;
  padding: 10px 16px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--glass-border);
  border-radius: 10px;
  color: var(--text-primary);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  text-align: center;
  transition: var(--transition);
}

.btn-format:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.15);
}

/* iOS sideload guides box */
.ios-guide-box {
  border-top: 1px solid var(--glass-border);
  padding-top: 20px;
}

/* Android install guides box */
.android-guide-box {
  border-top: 1px solid var(--glass-border);
  padding-top: 20px;
  margin-top: 20px;
}

/* iOS sideload repository box */
.ios-repo-box {
  border-top: 1px solid var(--glass-border);
  padding-top: 20px;
  margin-top: 20px;
}

/* Android info box */
.android-info-box {
  border-top: 1px solid var(--glass-border);
  padding-top: 20px;
  margin-top: 20px;
}

.repo-desc {
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 12px;
  line-height: 1.5;
}

.repo-input-wrapper {
  display: flex;
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--glass-border);
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 12px;
}

.repo-input {
  flex-grow: 1;
  background: none;
  border: none;
  color: var(--text-primary);
  font-family: monospace;
  font-size: 11.5px;
  padding: 10px 12px;
  outline: none;
  width: 100%;
}

.btn-copy-icon {
  background: none;
  border: none;
  color: var(--text-secondary);
  padding: 0 14px;
  cursor: pointer;
  transition: var(--transition);
}

.btn-copy-icon:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}

.repo-actions-row {
  display: flex;
  gap: 10px;
}

.btn-repo-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 16px;
  font-size: 12px;
  font-weight: 700;
  border-radius: 8px;
  background: rgba(99, 102, 241, 0.15);
  color: #818cf8;
  border: 1px solid rgba(99, 102, 241, 0.3);
  text-decoration: none;
  transition: var(--transition);
  width: 100%;
}

.btn-repo-action:hover {
  background: var(--accent-gradient);
  color: white;
  border-color: transparent;
  box-shadow: 0 0 10px rgba(168, 85, 247, 0.3);
}

.guide-title {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  display: block;
  margin-bottom: 12px;
}

.guide-steps {
  padding-left: 18px;
  font-size: 12.5px;
  color: var(--text-secondary);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.guide-note {
  margin-top: 14px;
  font-size: 12px;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 6px;
  opacity: 0.85;
}

.guide-note i {
  color: #a855f7;
}

.guide-steps li::marker {
  font-weight: bold;
  color: #a855f7;
}

.guide-steps a {
  color: #818cf8;
  text-decoration: none;
  font-weight: 600;
}

.guide-steps a:hover {
  text-decoration: underline;
}

/* Release info / Changelog block */
.release-info-box {
  padding: 24px;
  margin-top: 32px;
}

.release-info-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  border-bottom: 1px solid var(--glass-border);
  padding-bottom: 16px;
  margin-bottom: 16px;
}

.release-info-header h4 {
  font-family: 'Nunito', sans-serif;
  font-size: 16px;
  font-weight: 700;
}

.release-pub-date {
  font-size: 12px;
  color: var(--text-secondary);
}

.changelog-content h5 {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.changelog-content ul {
  padding-left: 20px;
  font-size: 13px;
  color: var(--text-secondary);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

/* Features Grid */
.features-section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 60px 24px 80px 24px;
  border-top: 1px solid var(--glass-border);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.feature-card {
  padding: 28px;
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 255, 255, 0.15);
  background: rgba(255, 255, 255, 0.05);
}

.feature-icon {
  font-size: 28px;
  margin-bottom: 16px;
  display: inline-flex;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.feature-name {
  font-family: 'Nunito', sans-serif;
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}

.feature-desc {
  color: var(--text-secondary);
  font-size: 13px;
  line-height: 1.5;
}

/* Footer style */
footer {
  background: #060608;
  border-top: 1px solid var(--glass-border);
  padding: 40px 24px;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 16px;
  font-size: 13px;
  color: #4b5563;
}

.footer-links a {
  color: #4b5563;
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
}

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

/* Animations */
.fade-in-up {
  opacity: 0;
  animation: fadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.hero-content > *:nth-child(1) { animation-delay: 0.1s; }
.hero-content > *:nth-child(2) { animation-delay: 0.2s; }
.hero-content > *:nth-child(3) { animation-delay: 0.3s; }
.hero-content > *:nth-child(4) { animation-delay: 0.4s; }

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .header-container {
    padding: 12px 16px;
  }
  
  .logo-area {
    font-size: 18px;
  }

  .header-links {
    display: none;
  }
  
  .hero {
    padding: 40px 16px 30px 16px;
  }

  .hero-title {
    font-size: 28px;
    line-height: 1.25;
    margin-bottom: 12px;
  }

  .hero-subtitle {
    font-size: 14px;
    margin-bottom: 24px;
  }

  .hero-actions {
    display: flex;
    flex-direction: column;
    gap: 12px;
    align-items: stretch;
    max-width: 290px;
    margin: 0 auto;
  }

  .btn {
    width: 100%;
    padding: 12px 20px;
    font-size: 14px;
  }

  .btn-secondary {
    margin-left: 0;
  }

  .download-section {
    padding: 40px 16px;
  }

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

  .download-card {
    padding: 24px 16px;
  }

  .release-info-box {
    padding: 16px;
  }

  .release-info-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }

  .features-section {
    padding: 40px 16px;
  }

  .features-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .feature-card {
    padding: 20px 16px;
  }

  footer {
    padding: 30px 16px;
  }
}

/* Spacing for button icons */
.btn i,
.btn-format i,
.btn-download-nav i,
.btn-download-main i {
  margin-right: 8px;
}

/* Changelog History Accordion */
.history-item {
  border-bottom: 1px solid var(--glass-border);
  padding: 14px 0;
}
.history-item:last-child {
  border-bottom: none;
}
.history-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  padding: 6px 0;
  user-select: none;
}
.history-ver {
  font-weight: 700;
  color: var(--text-primary);
  font-size: 14px;
}
.history-date {
  color: var(--text-secondary);
  font-size: 12px;
  margin-left: auto;
  margin-right: 16px;
}
.history-icon {
  color: var(--text-secondary);
  font-size: 12px;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.history-item.active .history-icon {
  transform: rotate(180deg);
  color: #a855f7;
}
.history-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.history-body ul {
  padding-left: 20px;
  padding-top: 12px;
  padding-bottom: 6px;
  font-size: 13px;
  color: var(--text-secondary);
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.history-body ul li {
  line-height: 1.5;
}

/* History Trigger Link */
.btn-history-link {
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.3);
  color: #818cf8;
  padding: 6px 14px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  transition: var(--transition);
  outline: none;
}
.btn-history-link:hover {
  background: var(--accent-gradient);
  color: white;
  border-color: transparent;
  box-shadow: 0 0 12px rgba(168, 85, 247, 0.4);
  transform: translateY(-1px);
}
.btn-history-link i {
  font-size: 11px;
}

/* Modal Overlay Dialog */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(10, 10, 12, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  padding: 16px;
}
.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

/* Modal Content Container */
.modal-content {
  width: 100%;
  max-width: 600px;
  max-height: 80vh;
  display: flex;
  flex-direction: column;
  background: rgba(20, 20, 25, 0.7);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1.5px solid var(--glass-border);
  border-radius: 24px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6);
  transform: scale(0.92);
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  overflow: hidden;
}
.modal-overlay.active .modal-content {
  transform: scale(1);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--glass-border);
}
.modal-header h3 {
  font-family: 'Nunito', sans-serif;
  font-size: 18px;
  font-weight: 800;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.btn-close {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--glass-border);
  color: var(--text-secondary);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
}
.btn-close:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.1);
  transform: rotate(90deg);
}

.modal-body {
  padding: 24px;
  overflow-y: auto;
  flex-grow: 1;
}

/* Custom Scrollbar for Modal Body */
.modal-body::-webkit-scrollbar {
  width: 6px;
}
.modal-body::-webkit-scrollbar-track {
  background: transparent;
}
.modal-body::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
}
.modal-body::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.2);
}

.release-header-left {
  display: flex;
  flex-direction: column;
  gap: 4px;
}