/* ===== CSS Variables & Reset ===== */
:root {
  --bg-primary: #0a0e1a;
  --bg-secondary: #111827;
  --bg-card: #1a2035;
  --bg-card-hover: #222a42;
  --accent: #f59e0b;
  --accent-light: #fbbf24;
  --accent-dark: #d97706;
  --accent-glow: rgba(245, 158, 11, 0.3);
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --border: #1e293b;
  --success: #10b981;
  --info: #3b82f6;
  --gradient-accent: linear-gradient(135deg, #f59e0b, #ef4444);
  --gradient-card: linear-gradient(145deg, #1a2035, #0f1629);
  --radius: 16px;
  --radius-sm: 8px;
  --shadow: 0 8px 32px rgba(0,0,0,0.3);
  --shadow-glow: 0 0 30px rgba(245, 158, 11, 0.15);
  --font: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --max-w: 1200px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
  font-family: var(--font);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

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

/* ===== Utility ===== */
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }
.section { padding: 100px 0; }
.section-label {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 0.8rem; font-weight: 600; letter-spacing: 2px;
  text-transform: uppercase; color: var(--accent);
  margin-bottom: 16px;
}
.section-title {
  font-size: clamp(2rem, 5vw, 3rem); font-weight: 800;
  line-height: 1.2; margin-bottom: 20px;
}
.section-subtitle {
  font-size: 1.15rem; color: var(--text-secondary);
  max-width: 640px; margin-bottom: 48px;
}
.text-center { text-align: center; }
.mx-auto { margin-left: auto; margin-right: auto; }
.gradient-text {
  background: var(--gradient-accent);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ===== Animated Background Particles ===== */
#particles-canvas {
  position: fixed; top: 0; left: 0; width: 100%; height: 100%;
  z-index: 0; pointer-events: none; opacity: 0.4;
}

/* ===== Navigation ===== */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  padding: 16px 0;
  background: rgba(10, 14, 26, 0.8);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
  transition: all var(--transition);
}
.navbar.scrolled {
  padding: 10px 0;
  border-bottom-color: var(--border);
  box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}
.navbar .container {
  display: flex; align-items: center; justify-content: space-between;
}
.nav-brand {
  display: flex; align-items: center; gap: 12px;
  font-size: 1.25rem; font-weight: 700; color: var(--text-primary);
}
.nav-brand img { width: 36px; height: 36px; border-radius: 8px; }
.nav-brand span { color: var(--accent); }
.nav-links { display: flex; align-items: center; gap: 32px; list-style: none; }
.nav-links a {
  color: var(--text-secondary); font-size: 0.9rem; font-weight: 500;
  position: relative; padding: 4px 0;
}
.nav-links a::after {
  content: ''; position: absolute; bottom: -2px; left: 0;
  width: 0; height: 2px; background: var(--accent);
  transition: width var(--transition);
}
.nav-links a:hover { color: var(--text-primary); }
.nav-links a:hover::after { width: 100%; }
.nav-cta {
  background: var(--gradient-accent) !important;
  color: #fff !important; padding: 8px 20px !important;
  border-radius: 99px; font-weight: 600 !important;
  font-size: 0.85rem !important;
}
.nav-cta::after { display: none !important; }
.mobile-toggle {
  display: none; background: none; border: none;
  color: var(--text-primary); font-size: 1.5rem; cursor: pointer;
}

/* ===== Hero ===== */
.hero {
  position: relative; min-height: 100vh;
  display: flex; align-items: center;
  padding: 120px 0 80px; overflow: hidden;
}
.hero-content {
  position: relative; z-index: 2;
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 60px; align-items: center;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(245,158,11,0.1); border: 1px solid rgba(245,158,11,0.2);
  border-radius: 99px; padding: 6px 16px;
  font-size: 0.8rem; font-weight: 600; color: var(--accent);
  margin-bottom: 24px;
  animation: fadeInUp 0.6s ease-out;
}
.hero-badge .pulse {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--success);
  animation: pulse 2s infinite;
}
.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 900; line-height: 1.1;
  margin-bottom: 24px;
  animation: fadeInUp 0.6s ease-out 0.1s both;
}
.hero p.hero-desc {
  font-size: 1.2rem; color: var(--text-secondary);
  margin-bottom: 36px; max-width: 520px;
  animation: fadeInUp 0.6s ease-out 0.2s both;
}
.hero-actions {
  display: flex; gap: 16px; flex-wrap: wrap;
  animation: fadeInUp 0.6s ease-out 0.3s both;
}
.hero-stats {
  display: flex; gap: 40px; margin-top: 48px;
  animation: fadeInUp 0.6s ease-out 0.4s both;
}
.hero-stat h3 {
  font-size: 2rem; font-weight: 800; color: var(--accent);
}
.hero-stat p { font-size: 0.85rem; color: var(--text-muted); }
.hero-visual {
  display: flex; justify-content: center; align-items: center;
  position: relative;
  animation: fadeInRight 0.8s ease-out 0.3s both;
}
.phone-mockup {
  position: relative; width: 280px;
  background: var(--bg-card); border-radius: 36px;
  border: 3px solid var(--border);
  padding: 16px; box-shadow: var(--shadow), var(--shadow-glow);
}
.phone-mockup img {
  border-radius: 24px; width: 100%;
}
.phone-glow {
  position: absolute; top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 350px; height: 350px;
  background: radial-gradient(circle, var(--accent-glow), transparent 70%);
  z-index: -1; animation: glow-pulse 4s ease-in-out infinite;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 28px; border-radius: 99px;
  font-size: 0.95rem; font-weight: 600;
  cursor: pointer; border: none;
  transition: all var(--transition);
  text-decoration: none;
}
.btn-primary {
  background: var(--gradient-accent); color: #fff;
  box-shadow: 0 4px 20px rgba(245,158,11,0.3);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(245,158,11,0.4);
  color: #fff;
}
.btn-secondary {
  background: rgba(255,255,255,0.05);
  color: var(--text-primary);
  border: 1px solid var(--border);
}
.btn-secondary:hover {
  background: rgba(255,255,255,0.1);
  border-color: var(--accent);
  color: var(--text-primary);
}

/* ===== Features Grid ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}
.feature-card {
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px;
  transition: all var(--transition);
  position: relative; overflow: hidden;
}
.feature-card::before {
  content: ''; position: absolute; top: 0; left: 0;
  width: 100%; height: 3px;
  background: var(--gradient-accent);
  transform: scaleX(0); transform-origin: left;
  transition: transform var(--transition);
}
.feature-card:hover {
  transform: translateY(-4px);
  border-color: rgba(245,158,11,0.3);
  box-shadow: var(--shadow-glow);
}
.feature-card:hover::before { transform: scaleX(1); }
.feature-icon {
  width: 56px; height: 56px; border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem; margin-bottom: 20px;
  background: rgba(245,158,11,0.1);
}
.feature-card h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 12px; }
.feature-card p { color: var(--text-secondary); font-size: 0.95rem; }

/* ===== How It Works ===== */
.steps-container {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 32px; counter-reset: step;
}
.step-card {
  text-align: center; padding: 40px 24px;
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  position: relative; counter-increment: step;
  transition: all var(--transition);
}
.step-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}
.step-number {
  width: 56px; height: 56px;
  border-radius: 50%; margin: 0 auto 20px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem; font-weight: 800;
  background: var(--gradient-accent); color: #fff;
}
.step-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 12px; }
.step-card p { color: var(--text-secondary); font-size: 0.9rem; }

/* ===== Screenshots Carousel ===== */
.screenshots-track {
  display: flex; gap: 24px;
  overflow-x: auto; scroll-snap-type: x mandatory;
  padding: 20px 0 40px;
  -ms-overflow-style: none; scrollbar-width: none;
}
.screenshots-track::-webkit-scrollbar { display: none; }
.screenshot-item {
  flex: 0 0 260px; scroll-snap-align: center;
  border-radius: var(--radius); overflow: hidden;
  border: 2px solid var(--border);
  transition: all var(--transition);
  position: relative;
}
.screenshot-item:hover {
  transform: scale(1.03);
  border-color: var(--accent);
  box-shadow: var(--shadow-glow);
}
.screenshot-item img { width: 100%; display: block; }
.screenshot-label {
  position: absolute; bottom: 0; left: 0; right: 0;
  padding: 12px; text-align: center;
  background: linear-gradient(transparent, rgba(0,0,0,0.8));
  font-size: 0.85rem; font-weight: 600;
}

/* ===== Architecture ===== */
.arch-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}
.arch-card {
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 24px; text-align: center;
  transition: all var(--transition);
}
.arch-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}
.arch-card .icon { font-size: 2rem; margin-bottom: 12px; }
.arch-card h4 { font-size: 0.95rem; font-weight: 700; margin-bottom: 6px; }
.arch-card p { font-size: 0.8rem; color: var(--text-muted); }

/* ===== Roadmap ===== */
.roadmap-timeline {
  position: relative; padding-left: 40px;
  max-width: 700px;
}
.roadmap-timeline::before {
  content: ''; position: absolute; left: 15px; top: 0;
  width: 2px; height: 100%;
  background: linear-gradient(to bottom, var(--accent), var(--border));
}
.roadmap-item {
  position: relative; margin-bottom: 36px;
  padding: 24px; background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}
.roadmap-item:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-glow);
}
.roadmap-item::before {
  content: ''; position: absolute; left: -33px; top: 28px;
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--accent);
  border: 3px solid var(--bg-primary);
}
.roadmap-item.done::before { background: var(--success); }
.roadmap-tag {
  display: inline-block; padding: 3px 10px;
  border-radius: 99px; font-size: 0.7rem; font-weight: 600;
  margin-bottom: 8px;
}
.roadmap-tag.current { background: rgba(245,158,11,0.15); color: var(--accent); }
.roadmap-tag.upcoming { background: rgba(59,130,246,0.15); color: var(--info); }
.roadmap-tag.done { background: rgba(16,185,129,0.15); color: var(--success); }
.roadmap-item h4 { font-size: 1.05rem; font-weight: 700; margin-bottom: 8px; }
.roadmap-item p { color: var(--text-secondary); font-size: 0.9rem; }

/* ===== Privacy ===== */
.privacy-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}
.privacy-card {
  display: flex; gap: 16px; align-items: flex-start;
  padding: 28px; background: var(--gradient-card);
  border: 1px solid var(--border); border-radius: var(--radius-sm);
}
.privacy-card .icon {
  font-size: 1.8rem; flex-shrink: 0;
}
.privacy-card h4 { font-weight: 700; margin-bottom: 6px; }
.privacy-card p { color: var(--text-secondary); font-size: 0.9rem; }

/* ===== Contributing CTA ===== */
.cta-section {
  position: relative; overflow: hidden;
  background: linear-gradient(135deg, rgba(245,158,11,0.08), rgba(239,68,68,0.05));
  border: 1px solid rgba(245,158,11,0.15);
  border-radius: var(--radius); padding: 64px 48px;
  text-align: center;
}
.cta-section h2 { font-size: 2.2rem; font-weight: 800; margin-bottom: 16px; }
.cta-section p {
  color: var(--text-secondary); font-size: 1.1rem;
  max-width: 560px; margin: 0 auto 32px;
}
.cta-actions { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }
.contrib-stats {
  display: flex; justify-content: center; gap: 48px;
  margin-top: 40px;
}
.contrib-stat { text-align: center; }
.contrib-stat h3 { font-size: 1.5rem; font-weight: 800; color: var(--accent); }
.contrib-stat p { font-size: 0.8rem; color: var(--text-muted); }

/* ===== Footer ===== */
.footer {
  padding: 60px 0 30px;
  border-top: 1px solid var(--border);
  background: var(--bg-secondary);
}
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px; margin-bottom: 40px;
}
.footer-brand p { color: var(--text-secondary); font-size: 0.9rem; margin-top: 12px; }
.footer-col h4 {
  font-size: 0.85rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: 1px; margin-bottom: 16px; color: var(--text-muted);
}
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 10px; }
.footer-col a { color: var(--text-secondary); font-size: 0.9rem; }
.footer-col a:hover { color: var(--accent); }
.footer-bottom {
  display: flex; justify-content: space-between; align-items: center;
  padding-top: 24px; border-top: 1px solid var(--border);
  font-size: 0.85rem; color: var(--text-muted);
}
.footer-bottom-links { display: flex; gap: 20px; }
.footer-bottom-links a { color: var(--text-muted); }

/* ===== Animations ===== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeInRight {
  from { opacity: 0; transform: translateX(40px); }
  to { opacity: 1; transform: translateX(0); }
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.5); }
}
@keyframes glow-pulse {
  0%, 100% { opacity: 0.5; transform: translate(-50%,-50%) scale(1); }
  50% { opacity: 0.8; transform: translate(-50%,-50%) scale(1.1); }
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.reveal {
  opacity: 0; transform: translateY(30px);
  transition: all 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}
.reveal.visible {
  opacity: 1; transform: translateY(0);
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .hero-content { grid-template-columns: 1fr; text-align: center; }
  .hero p.hero-desc { margin-left: auto; margin-right: auto; }
  .hero-actions { justify-content: center; }
  .hero-stats { justify-content: center; }
  .hero-visual { margin-top: 40px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-links.open {
    display: flex; flex-direction: column;
    position: absolute; top: 100%; left: 0; right: 0;
    background: rgba(10,14,26,0.98);
    padding: 20px; gap: 16px;
    border-bottom: 1px solid var(--border);
  }
  .mobile-toggle { display: block; }
  .section { padding: 64px 0; }
  .features-grid { grid-template-columns: 1fr; }
  .steps-container { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
  .cta-section { padding: 40px 24px; }
  .contrib-stats { flex-direction: column; gap: 20px; }
}