/* ═══════════════════════════════════════════════════════════════
   AiroDrop Landing Page — Premium Dark Theme
   ═══════════════════════════════════════════════════════════════ */

:root {
  --bg-primary: #050508;
  --bg-secondary: #0a0a10;
  --bg-card: rgba(255, 255, 255, 0.03);
  --bg-card-hover: rgba(255, 255, 255, 0.06);
  --glass-bg: rgba(10, 10, 18, 0.7);
  --glass-border: rgba(255, 255, 255, 0.06);
  --glass-border-hover: rgba(255, 255, 255, 0.14);
  --text-primary: #f0f0f8;
  --text-secondary: #8888a8;
  --text-muted: #555570;
  --accent: #ff5500;
  --accent-light: #ff8833;
  --accent-dark: #cc4400;
  --accent-glow: rgba(255, 85, 0, 0.3);
  --success: #22c55e;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  font-family: var(--font);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  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 { display: block; max-width: 100%; }

/* ─── Utilities ───────────────────────────────────────────── */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.gradient-text {
  background: linear-gradient(135deg, var(--accent), var(--accent-light), #ffcc00);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.section-header { text-align: center; margin-bottom: 64px; }
.section-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--accent);
  background: rgba(255, 85, 0, 0.1);
  border: 1px solid rgba(255, 85, 0, 0.2);
  padding: 6px 16px;
  border-radius: 99px;
  margin-bottom: 20px;
}
.section-title { font-size: clamp(2rem, 5vw, 3.2rem); font-weight: 800; line-height: 1.15; margin-bottom: 16px; letter-spacing: -0.03em; }
.section-subtitle { font-size: 1.1rem; color: var(--text-secondary); max-width: 600px; margin: 0 auto; }

/* ─── Buttons ─────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font);
  font-weight: 600;
  font-size: 0.9rem;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: #fff;
  box-shadow: 0 4px 20px var(--accent-glow);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--accent-glow);
  color: #fff;
}
.btn-ghost {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--glass-border-hover);
}
.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.2);
  color: #fff;
}
.btn-lg { padding: 16px 32px; font-size: 1rem; border-radius: var(--radius); }
.btn-github {
  background: #24292f;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.1);
}
.btn-github:hover {
  background: #333a42;
  border-color: rgba(255, 255, 255, 0.2);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
}

.btn-download { width: 100%; justify-content: center; padding: 14px 24px; }
.btn-icon {
  display: flex; align-items: center; justify-content: center;
  width: 36px; height: 36px; border-radius: 8px;
  border: 1px solid var(--glass-border-hover);
  background: transparent; color: var(--text-secondary);
  cursor: pointer; transition: all var(--transition);
}
.btn-icon:hover { background: rgba(255,255,255,0.06); color: var(--accent); }

/* ─── Navigation ──────────────────────────────────────────── */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  padding: 12px 0;
  background: rgba(5, 5, 8, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
  transition: all var(--transition);
}
.nav.scrolled { border-bottom-color: var(--glass-border); }
.nav-container {
  max-width: 1200px; margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between;
}
.nav-brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.nav-logo { width: 34px; height: 34px; }
.nav-title { font-size: 1.1rem; font-weight: 700; color: var(--text-primary); }
.nav-version {
  font-size: 0.65rem; font-weight: 600;
  background: rgba(255, 85, 0, 0.15); color: var(--accent);
  padding: 2px 8px; border-radius: 99px;
}
.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links a { color: var(--text-secondary); font-size: 0.88rem; font-weight: 500; transition: color var(--transition); }
.nav-links a:hover { color: var(--text-primary); }
.nav-github { color: var(--text-secondary) !important; }
.nav-github:hover { color: var(--text-primary) !important; }
.nav-mobile-toggle {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 4px;
}
.nav-mobile-toggle span { display: block; width: 22px; height: 2px; background: var(--text-secondary); border-radius: 2px; transition: all var(--transition); }

/* ─── Hero ────────────────────────────────────────────────── */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex; align-items: center;
  padding: 120px 0 80px;
  overflow: hidden;
}
.hero-bg-effects { position: absolute; inset: 0; pointer-events: none; overflow: hidden; }
.hero-orb {
  position: absolute; border-radius: 50%;
  filter: blur(100px); opacity: 0.4;
  animation: orbFloat 20s ease-in-out infinite;
  will-change: transform;
  transform: translate3d(0, 0, 0);
}
.hero-orb-1 { width: 600px; height: 600px; top: -20%; left: -10%; background: rgba(255, 85, 0, 0.15); }
.hero-orb-2 { width: 500px; height: 500px; bottom: -10%; right: -5%; background: rgba(255, 0, 85, 0.1); animation-delay: -7s; }
.hero-orb-3 { width: 400px; height: 400px; top: 30%; right: 20%; background: rgba(255, 170, 0, 0.08); animation-delay: -14s; }
@keyframes orbFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -20px) scale(1.05); }
  66% { transform: translate(-20px, 15px) scale(0.95); }
}
.hero-container {
  position: relative; z-index: 1;
  max-width: 1200px; margin: 0 auto; padding: 0 24px;
  display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center;
}
.hero-content { max-width: 560px; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 0.78rem; font-weight: 600; color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--glass-border);
  padding: 8px 18px; border-radius: 99px; margin-bottom: 28px;
}
.badge-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 8px rgba(34, 197, 94, 0.5);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.4; } }
.hero-title { font-size: clamp(2.8rem, 6vw, 4.5rem); font-weight: 900; line-height: 1.05; letter-spacing: -0.04em; margin-bottom: 24px; }
.hero-subtitle { font-size: 1.15rem; color: var(--text-secondary); line-height: 1.7; margin-bottom: 36px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 48px; }

/* ─── Hero Stats ──────────────────────────────────────────── */
.hero-stats {
  display: flex; align-items: center; gap: 24px;
  padding: 20px 28px; border-radius: var(--radius);
  background: var(--bg-card); border: 1px solid var(--glass-border);
}
.stat-item { text-align: center; }
.stat-value { display: block; font-size: 1.4rem; font-weight: 800; color: var(--text-primary); }
.stat-label { font-size: 0.72rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px; }
.stat-divider { width: 1px; height: 36px; background: var(--glass-border); }

/* ─── Hero Mockup ─────────────────────────────────────────── */
.hero-visual { display: flex; justify-content: center; }
.hero-mockup { position: relative; width: 100%; max-width: 520px; }
.mockup-window {
  background: rgba(15, 15, 22, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 40px 80px rgba(0, 0, 0, 0.6), 0 0 60px rgba(255, 85, 0, 0.05);
  animation: mockupFloat 6s ease-in-out infinite;
}
@keyframes mockupFloat {
  0%, 100% { transform: translate3d(0, 0, 0); }
  50% { transform: translate3d(0, -8px, 0); }
}
.mockup-titlebar {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}
.mockup-dots { display: flex; gap: 6px; }
.mockup-dots span { width: 10px; height: 10px; border-radius: 50%; }
.mockup-dots span:nth-child(1) { background: #ff5f57; }
.mockup-dots span:nth-child(2) { background: #febc2e; }
.mockup-dots span:nth-child(3) { background: #28c840; }
.mockup-title { font-size: 0.7rem; color: var(--text-muted); }
.mockup-body { display: flex; min-height: 280px; }
.mockup-sidebar { width: 50px; padding: 12px 8px; display: flex; flex-direction: column; gap: 8px; border-right: 1px solid rgba(255,255,255,0.04); }
.mockup-nav-item { height: 8px; border-radius: 4px; background: rgba(255,255,255,0.06); }
.mockup-nav-item.active { background: var(--accent); opacity: 0.7; }
.mockup-main { flex: 1; padding: 14px; display: flex; flex-direction: column; gap: 10px; }
.mockup-card-lg { height: 50px; border-radius: 8px; background: rgba(255,85,0,0.08); border: 1px solid rgba(255,85,0,0.12); }
.mockup-cards-row { display: flex; gap: 8px; }
.mockup-card { flex: 1; height: 40px; border-radius: 6px; background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.05); }
.mockup-feed { display: flex; flex-direction: column; gap: 6px; }
.mockup-feed-item { height: 28px; border-radius: 6px; background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.04); }

/* ─── Phone Mockup ────────────────────────────────────────── */
.mockup-phone {
  position: absolute; bottom: -20px; right: -30px;
  width: 140px; height: 260px;
  background: rgba(15, 15, 22, 0.95);
  border: 2px solid rgba(255, 255, 255, 0.1);
  border-radius: 24px;
  padding: 8px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  transform: rotate(3deg);
  animation: phoneFloat 6s ease-in-out infinite 1s;
}
@keyframes phoneFloat {
  0%, 100% { transform: rotate(3deg) translate3d(0, 0, 0); }
  50% { transform: rotate(3deg) translate3d(0, -6px, 0); }
}
.phone-notch {
  width: 50px; height: 6px; margin: 4px auto 10px;
  background: rgba(255, 255, 255, 0.1); border-radius: 3px;
}
.phone-screen { display: flex; flex-direction: column; gap: 8px; padding: 4px; }
.phone-header { height: 16px; border-radius: 4px; background: rgba(255, 85, 0, 0.2); }
.phone-card { height: 40px; border-radius: 6px; background: rgba(255, 255, 255, 0.05); border: 1px solid rgba(255,255,255,0.06); }
.phone-card.short { height: 28px; }
.phone-btn { height: 28px; border-radius: 6px; background: linear-gradient(135deg, var(--accent), var(--accent-dark)); opacity: 0.7; margin-top: 4px; }

/* ─── Features ────────────────────────────────────────────── */
.features { padding: 120px 0; }
.features-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.feature-card {
  padding: 32px 28px;
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  transition: all var(--transition);
}
.feature-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--glass-border-hover);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}
.feature-highlight {
  border-color: rgba(255, 85, 0, 0.15);
  background: rgba(255, 85, 0, 0.03);
}
.feature-highlight:hover { border-color: rgba(255, 85, 0, 0.3); }
.feature-icon {
  width: 48px; height: 48px; margin-bottom: 20px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(255, 85, 0, 0.1);
  border-radius: 12px;
  color: var(--accent);
}
.feature-icon svg { width: 24px; height: 24px; }
.feature-card h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 8px; color: var(--text-primary); }
.feature-card p { font-size: 0.88rem; color: var(--text-secondary); line-height: 1.6; }

/* ─── Download ────────────────────────────────────────────── */
.download { padding: 120px 0; }
.download-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 24px; max-width: 760px; margin: 0 auto; }
.download-card {
  position: relative;
  padding: 40px 32px;
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: all var(--transition);
  display: flex; flex-direction: column; align-items: center; gap: 16px;
}
.download-card:hover { border-color: var(--glass-border-hover); transform: translateY(-4px); box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3); }
.download-badge {
  position: absolute; top: -10px; left: 50%; transform: translateX(-50%);
  font-size: 0.7rem; font-weight: 700; text-transform: uppercase; letter-spacing: 1px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: #fff; padding: 4px 14px; border-radius: 99px;
}
.download-icon { color: var(--accent); margin-bottom: 4px; }
.download-icon svg { width: 48px; height: 48px; }
.download-card h3 { font-size: 1.2rem; font-weight: 700; }
.download-card p { font-size: 0.88rem; color: var(--text-secondary); max-width: 280px; }
.download-meta { font-size: 0.75rem; color: var(--text-muted); margin-top: 4px; }
.download-footer { text-align: center; margin-top: 40px; font-size: 0.9rem; color: var(--text-secondary); }

/* ─── Shortcuts ───────────────────────────────────────────── */
.shortcuts { padding: 120px 0; }
.shortcuts-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; margin-bottom: 48px; }
.shortcut-card {
  padding: 36px 28px;
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  text-align: center;
  display: flex; flex-direction: column; align-items: center; gap: 14px;
  transition: all var(--transition);
}
.shortcut-card:hover { border-color: var(--glass-border-hover); transform: translateY(-3px); }
.shortcut-emoji { font-size: 2.8rem; }
.shortcut-card h3 { font-size: 1.1rem; font-weight: 700; }
.shortcut-card p { font-size: 0.85rem; color: var(--text-secondary); max-width: 260px; line-height: 1.6; }
.shortcut-qr {
  width: 120px; height: 120px; margin-top: 8px;
  background: #fff; border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}
.shortcut-qr img { width: 100%; height: 100%; object-fit: contain; }
.qr-label { font-size: 0.7rem; color: var(--text-muted); }

/* ─── IP Config Card ──────────────────────────────────────── */
.ip-card {
  display: flex; align-items: flex-start; gap: 20px;
  padding: 32px;
  background: rgba(255, 85, 0, 0.03);
  border: 1px solid rgba(255, 85, 0, 0.12);
  border-radius: var(--radius-lg);
}
.ip-card-icon { color: var(--accent); flex-shrink: 0; margin-top: 4px; }
.ip-card-content { flex: 1; }
.ip-card-content h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 6px; }
.ip-card-content > p { font-size: 0.88rem; color: var(--text-secondary); margin-bottom: 14px; }
.ip-display {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 18px;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  margin-bottom: 10px;
}
.ip-display code { font-size: 1rem; font-weight: 600; color: var(--accent-light); font-family: 'JetBrains Mono', monospace; flex: 1; }
.ip-note { font-size: 0.78rem; color: var(--text-muted); }

/* ─── Setup Steps ─────────────────────────────────────────── */
.setup { padding: 120px 0; }
.steps-grid {
  display: flex; align-items: center; justify-content: center;
  gap: 16px; flex-wrap: wrap; margin-bottom: 60px;
}
.step-card {
  flex: 1; min-width: 220px; max-width: 300px;
  padding: 32px 24px; text-align: center;
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition);
}
.step-card:hover { border-color: var(--glass-border-hover); transform: translateY(-3px); }
.step-number {
  display: inline-flex; align-items: center; justify-content: center;
  width: 44px; height: 44px; margin-bottom: 16px;
  font-size: 1.2rem; font-weight: 800;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: #fff; border-radius: 50%;
}
.step-card h3 { font-size: 1rem; font-weight: 700; margin-bottom: 8px; }
.step-card p { font-size: 0.85rem; color: var(--text-secondary); line-height: 1.6; }
.step-connector { color: var(--text-muted); flex-shrink: 0; }
.step-connector svg { width: 20px; height: 20px; }

/* ─── Web App Card ────────────────────────────────────────── */
.webapp-card {
  display: flex; align-items: center; gap: 32px;
  padding: 36px;
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
}
.webapp-text { flex: 1; }
.webapp-text h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 10px; }
.webapp-text p { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.6; margin-bottom: 14px; }
.webapp-url {
  display: inline-block;
  font-size: 0.9rem; font-weight: 600; color: var(--accent-light);
  background: rgba(0, 0, 0, 0.3);
  padding: 10px 18px; border-radius: var(--radius-sm);
  border: 1px solid var(--glass-border);
  font-family: monospace;
}
.webapp-qr {
  width: 140px; height: 140px; flex-shrink: 0;
  background: #fff; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}
.webapp-qr img { width: 100%; height: 100%; object-fit: contain; }

/* ─── Footer ──────────────────────────────────────────────── */
.footer {
  padding: 48px 0;
  border-top: 1px solid var(--glass-border);
  margin-top: 40px;
}
.footer-inner { display: flex; flex-direction: column; align-items: center; gap: 16px; text-align: center; }
.footer-brand { display: flex; align-items: center; gap: 10px; font-size: 1.1rem; font-weight: 700; color: var(--text-primary); }
.footer-logo { width: 28px; height: 28px; }
.footer-links { display: flex; gap: 24px; }
.footer-links a { font-size: 0.85rem; color: var(--text-secondary); }
.footer-links a:hover { color: var(--text-primary); }
.footer-copy { font-size: 0.78rem; color: var(--text-muted); }
.footer-copy a { color: var(--text-secondary); }

/* ─── Scroll Animations (GPU-accelerated, 120fps) ─────────── */
[data-aos] {
  opacity: 0;
  transform: translate3d(0, 40px, 0);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}
[data-aos].visible {
  opacity: 1;
  transform: translate3d(0, 0, 0);
}

/* Parallax elements get hardware acceleration */
.hero-orb, .hero-mockup {
  will-change: transform;
  transform: translate3d(0, 0, 0);
}

/* Smooth body scroll feel */
html {
  scroll-behavior: smooth;
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  [data-aos] { opacity: 1; transform: none; transition: none; }
  .hero-orb { animation: none; }
}

/* ─── Responsive ──────────────────────────────────────────── */
@media (max-width: 900px) {
  .hero-container { grid-template-columns: 1fr; gap: 48px; }
  .hero-content { max-width: 100%; text-align: center; }
  .hero-actions { justify-content: center; }
  .hero-stats { justify-content: center; }
  .hero-visual { order: -1; }
  .hero-mockup { max-width: 400px; }
  .mockup-phone { right: -15px; width: 110px; height: 200px; border-radius: 18px; }
  .steps-grid { flex-direction: column; }
  .step-connector { transform: rotate(90deg); }
  .webapp-card { flex-direction: column; text-align: center; }
  .ip-card { flex-direction: column; }
}

@media (max-width: 640px) {
  .nav-links { display: none; position: absolute; top: 60px; left: 0; right: 0; flex-direction: column; background: rgba(5,5,8,0.97); border-bottom: 1px solid var(--glass-border); padding: 20px; gap: 16px; backdrop-filter: blur(20px); }
  .nav-links.open { display: flex; }
  .nav-mobile-toggle { display: flex; }
  .hero { min-height: auto; padding: 100px 0 60px; }
  .hero-title { font-size: 2.4rem; }
  .hero-stats { flex-direction: column; gap: 12px; }
  .stat-divider { width: 40px; height: 1px; }
  .features-grid { grid-template-columns: 1fr; }
  .download-grid { grid-template-columns: 1fr; }
  .shortcuts-grid { grid-template-columns: 1fr; }
}