/* ==========================================================================
   Design System & Tokens (Dark Glassmorphism Theme)
   ========================================================================== */
:root {
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Color Palette */
  --bg-dark: #080b11;
  --bg-card: rgba(18, 24, 38, 0.65);
  --bg-card-hover: rgba(28, 36, 56, 0.8);
  --border-glass: rgba(255, 255, 255, 0.08);
  --border-glass-bright: rgba(255, 255, 255, 0.18);

  --text-primary: #f3f4f6;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;

  /* Accent Colors */
  --accent-blue: #3b82f6;
  --accent-blue-glow: rgba(59, 130, 246, 0.4);
  --accent-purple: #8b5cf6;
  --accent-purple-glow: rgba(139, 92, 246, 0.4);
  --accent-green: #10b981;
  --accent-green-glow: rgba(16, 185, 129, 0.4);
  --accent-orange: #f59e0b;

  --gradient-text: linear-gradient(135deg, #60a5fa 0%, #a78bfa 50%, #f472b6 100%);
  --gradient-btn: linear-gradient(135deg, #3b82f6 0%, #6366f1 100%);
  --gradient-btn-hover: linear-gradient(135deg, #2563eb 0%, #4f46e5 100%);

  /* Layout Spacing & Radius */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;

  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ==========================================================================
   Global Resets & Base Styles
   ========================================================================== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  color-scheme: dark;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* Ambient Background Glows */
.ambient-glow {
  position: fixed;
  border-radius: 50%;
  filter: blur(140px);
  pointer-events: none;
  z-index: 0;
  opacity: 0.4;
}

.glow-1 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--accent-blue) 0%, transparent 70%);
  top: -100px;
  left: -100px;
}

.glow-2 {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--accent-purple) 0%, transparent 70%);
  top: 40%;
  right: -150px;
}

.app-layout {
  position: relative;
  z-index: 1;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ==========================================================================
   Header & Glass Navbar
   ========================================================================== */
.navbar {
  position: sticky;
  top: 16px;
  z-index: 100;
  margin-top: 16px;
  border-radius: var(--radius-full);
  background: rgba(12, 17, 29, 0.75);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-glass);
  padding: 12px 24px;
  transition: var(--transition-smooth);
}

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

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-primary);
}

.brand-avatar {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: var(--gradient-btn);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.2rem;
  box-shadow: 0 4px 12px var(--accent-blue-glow);
}

.brand-info {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-weight: 700;
  font-size: 1.05rem;
  line-height: 1.2;
}

.brand-tag {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
}

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

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

.github-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-glass-bright);
  color: var(--text-primary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  transition: var(--transition-fast);
}

.github-btn:hover {
  background: rgba(255, 255, 255, 0.15);
  transform: translateY(-1px);
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero-section {
  padding: 80px 0 60px 0;
  text-align: center;
  max-width: 860px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.25);
  color: var(--accent-blue);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 24px;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-blue);
  box-shadow: 0 0 8px var(--accent-blue);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(1.2); }
  100% { opacity: 1; transform: scale(1); }
}

.hero-title {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

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

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 36px;
  line-height: 1.6;
}

.platform-stats {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

.stat-pill {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-glass);
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.stat-pill i {
  width: 16px;
  height: 16px;
  color: var(--accent-blue);
}

/* ==========================================================================
   Apps Showcase & Category Filter Tabs
   ========================================================================== */
.apps-section {
  padding: 60px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 40px;
}

.section-title {
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.section-desc {
  color: var(--text-secondary);
  font-size: 1rem;
}

.filter-tabs {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 40px;
}

.tab-btn {
  padding: 10px 20px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-glass);
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-fast);
}

.tab-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
}

.tab-btn.active {
  background: var(--gradient-btn);
  border-color: transparent;
  color: #fff;
  font-weight: 600;
  box-shadow: 0 4px 14px var(--accent-blue-glow);
}

/* Apps Grid & Cards */
.apps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 28px;
}

.app-card {
  position: relative;
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow: hidden;
  transition: var(--transition-smooth);
}

.card-glass-glow {
  position: absolute;
  top: -50px;
  right: -50px;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--glow-color) 0%, transparent 70%);
  pointer-events: none;
  opacity: 0.6;
  transition: var(--transition-smooth);
}

.app-card:hover {
  transform: translateY(-6px);
  background: var(--bg-card-hover);
  border-color: var(--border-glass-bright);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
}

.app-card:hover .card-glass-glow {
  opacity: 1;
  transform: scale(1.2);
}

.app-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 20px;
}

.app-icon-wrapper {
  width: 60px;
  height: 60px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 20px rgba(0,0,0,0.3);
  overflow: hidden;
}

.logo-card-wrapper {
  background: transparent;
  padding: 0;
}

.app-logo-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 16px;
}

.modal-app-icon.custom-logo-wrapper {
  background: transparent;
  padding: 0;
  overflow: hidden;
}

.modal-app-icon .app-logo-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 20px;
}

.theme-blue { background: linear-gradient(135deg, #3b82f6, #1d4ed8); }
.theme-purple { background: linear-gradient(135deg, #8b5cf6, #6d28d9); }
.theme-green { background: linear-gradient(135deg, #10b981, #047857); }

.app-badges {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 6px;
}

.tag-group {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 6px;
}

.platform-tag {
  font-size: 0.73rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.tag-blue { background: rgba(59, 130, 246, 0.15); color: #60a5fa; border: 1px solid rgba(59, 130, 246, 0.3); }
.tag-purple { background: rgba(139, 92, 246, 0.15); color: #c084fc; border: 1px solid rgba(139, 92, 246, 0.3); }
.tag-green { background: rgba(16, 185, 129, 0.15); color: #34d399; border: 1px solid rgba(16, 185, 129, 0.3); }
.tag-gray { background: rgba(255, 255, 255, 0.06); color: var(--text-muted); border: 1px solid var(--border-glass); font-family: var(--font-mono); }

.version-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
}

.app-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.app-tagline {
  color: var(--text-secondary);
  font-size: 0.92rem;
  margin-bottom: 20px;
  min-height: 44px;
}

.app-highlights {
  list-style: none;
  margin-bottom: 24px;
}

.app-highlights li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.86rem;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.app-highlights li i {
  width: 14px;
  height: 14px;
  color: var(--accent-green);
}

.app-card-footer {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding-top: 16px;
  border-top: 1px solid var(--border-glass);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: var(--transition-fast);
  border: none;
}

.btn i { width: 16px; height: 16px; }

.btn-primary {
  background: var(--gradient-btn);
  color: #fff;
  box-shadow: 0 4px 12px var(--accent-blue-glow);
}

.btn-primary:hover {
  background: var(--gradient-btn-hover);
  transform: translateY(-1px);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
  border: 1px solid var(--border-glass);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.15);
}

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

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
}

.quick-links {
  display: flex;
  gap: 8px;
}

.quick-link-btn {
  flex: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-glass);
  color: var(--text-secondary);
  font-size: 0.8rem;
  cursor: pointer;
  transition: var(--transition-fast);
}

.quick-link-btn i { width: 14px; height: 14px; }

.quick-link-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
}

/* ==========================================================================
   About & Support Banners
   ========================================================================== */
.glass-card {
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: 40px;
}

.about-section {
  padding: 40px 0;
}

.about-badge {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--accent-blue);
  margin-bottom: 12px;
}

.about-content h2 {
  font-size: 2rem;
  margin-bottom: 16px;
}

.about-content p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: 16px;
}

.contact-methods {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.contact-pill {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-glass);
  color: var(--text-primary);
  text-decoration: none;
  font-size: 0.9rem;
  transition: var(--transition-fast);
}

.contact-pill i { width: 16px; height: 16px; color: var(--accent-purple); }

.contact-pill:hover {
  background: rgba(255, 255, 255, 0.12);
  transform: translateY(-2px);
}

.support-banner-section {
  padding: 20px 0 60px 0;
}

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

.support-info {
  display: flex;
  align-items: center;
  gap: 20px;
}

.support-icon {
  width: 48px;
  height: 48px;
  color: var(--accent-blue);
}

.support-info h3 { font-size: 1.25rem; margin-bottom: 4px; }
.support-info p { color: var(--text-secondary); font-size: 0.95rem; }

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
  border-top: 1px solid var(--border-glass);
  padding: 40px 0;
  margin-top: 40px;
}

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

.footer-left p { color: var(--text-secondary); font-size: 0.9rem; }
.footer-subtext { font-size: 0.8rem; color: var(--text-muted); margin-top: 4px; }

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

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

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

/* ==========================================================================
   Modal Overlay & Content System
   ========================================================================== */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(4, 7, 13, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition-smooth);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal-container {
  position: relative;
  width: 100%;
  max-width: 860px;
  max-height: 90vh;
  overflow-y: auto;
  padding: 32px;
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.8);
  border: 1px solid var(--border-glass-bright);
}

.modal-close-btn {
  position: absolute;
  top: 24px;
  right: 24px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border-glass);
  color: var(--text-primary);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-fast);
  z-index: 10;
}

.modal-close-btn:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: rotate(90deg);
}

/* Modal Header Banner */
.modal-header-banner {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-glass);
}

.modal-app-icon {
  width: 72px;
  height: 72px;
  border-radius: 20px;
  background: var(--gradient-btn);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.modal-app-icon i { width: 36px; height: 36px; color: #fff; }

.modal-title-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.modal-title-row h2 { font-size: 1.6rem; }

.modal-app-tagline {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-top: 4px;
}

/* Modal Tabs Nav */
.modal-nav-tabs {
  display: flex;
  gap: 8px;
  border-bottom: 1px solid var(--border-glass);
  margin-bottom: 24px;
  overflow-x: auto;
  padding-bottom: 4px;
}

.modal-tab {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 16px;
  border: none;
  background: none;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
  transition: var(--transition-fast);
}

.modal-tab i { width: 15px; height: 15px; }

.modal-tab:hover { color: var(--text-primary); }

.modal-tab.active {
  color: var(--accent-blue);
  border-bottom-color: var(--accent-blue);
  font-weight: 600;
}

/* Modal Panes */
.modal-tab-pane {
  display: none;
}

.modal-tab-pane.active {
  display: block;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.modal-tab-pane h3 {
  font-size: 1.15rem;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.modal-tab-pane h3 i { color: var(--accent-blue); width: 18px; height: 18px; }

/* Screenshots Carousel Mockup */
.screenshots-carousel {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 28px;
}

.screenshot-mockup {
  background: #0d121f;
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  height: 220px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  gap: 8px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.4);
}

.screenshot-mockup i { width: 32px; height: 32px; color: var(--accent-blue); }

.features-list {
  list-style: none;
  margin-bottom: 24px;
}

.features-list li {
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.02);
  margin-bottom: 8px;
  font-size: 0.92rem;
  color: var(--text-secondary);
}

/* Download Grid */
.download-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-top: 16px;
  margin-bottom: 24px;
}

.download-card {
  padding: 20px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-glass);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
}

.download-card-title {
  font-weight: 700;
  font-size: 1.05rem;
}

.download-card-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* FAQ Accordion */
.faq-accordion {
  margin-bottom: 28px;
}

.faq-item {
  border-bottom: 1px solid var(--border-glass);
  padding: 16px 0;
}

.faq-question {
  font-weight: 600;
  font-size: 1rem;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.faq-answer {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.support-contact-box {
  background: rgba(59, 130, 246, 0.06);
  border: 1px solid rgba(59, 130, 246, 0.2);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-top: 20px;
}

.support-contact-box h4 { margin-bottom: 6px; }
.support-contact-box p { font-size: 0.88rem; color: var(--text-secondary); margin-bottom: 14px; }

/* Privacy Document */
.privacy-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--border-glass);
  padding-bottom: 12px;
}

.update-date {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.privacy-document {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.privacy-document h4 {
  color: var(--text-primary);
  font-size: 1rem;
  margin: 16px 0 8px 0;
}

/* Issues & Feedback Grid */
.issue-options-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  margin-top: 20px;
}

.issue-card {
  padding: 24px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-glass);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
}

.issue-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: rgba(255,255,255,0.06);
  display: flex;
  align-items: center;
  justify-content: center;
}

.issue-card h4 { font-size: 1.1rem; }
.issue-card p { font-size: 0.86rem; color: var(--text-secondary); }

.text-muted { color: var(--text-muted); font-size: 0.9rem; }

/* Responsive Media Queries */
@media (max-width: 768px) {
  .hero-title { font-size: 2.2rem; }
  .nav-links { display: none; }
  .mobile-menu-btn { display: block; }
  .apps-grid { grid-template-columns: 1fr; }
  .support-card { flex-direction: column; align-items: flex-start; }
  .modal-container { padding: 20px; }
  .modal-header-banner { flex-direction: column; align-items: flex-start; }
}