/* ===== Base Styles & Variables ===== */
:root {
  --primary: #1DA1F2;
  --primary-dark: #0A3D62;
  --accent: #00D4AA;
  --accent-glow: rgba(0, 212, 170, 0.4);
  --bg-dark: #0B0E11;
  --bg-card: #151921;
  --bg-card-hover: #1a2029;
  --text-primary: #F5F6FA;
  --text-secondary: #8B95A5;
  --gradient-start: #1DA1F2;
  --gradient-end: #00D4AA;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* ===== Animated Background Particles ===== */
.particles {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.particle {
  position: absolute;
  width: 4px;
  height: 4px;
  background: var(--primary);
  border-radius: 50%;
  opacity: 0.3;
  animation: float 15s infinite ease-in-out;
}

.particle:nth-child(1) { left: 10%; animation-delay: 0s; animation-duration: 12s; }
.particle:nth-child(2) { left: 30%; animation-delay: 2s; animation-duration: 18s; }
.particle:nth-child(3) { left: 50%; animation-delay: 4s; animation-duration: 14s; }
.particle:nth-child(4) { left: 70%; animation-delay: 1s; animation-duration: 16s; }
.particle:nth-child(5) { left: 85%; animation-delay: 3s; animation-duration: 20s; }
.particle:nth-child(6) { left: 95%; animation-delay: 5s; animation-duration: 13s; }

@keyframes float {
  0%, 100% {
    transform: translateY(100vh) scale(0);
    opacity: 0;
  }
  10% {
    opacity: 0.4;
  }
  90% {
    opacity: 0.4;
  }
  100% {
    transform: translateY(-100vh) scale(1);
    opacity: 0;
  }
}

/* ===== Navigation ===== */
nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 40px;
  max-width: 1200px;
  margin: 0 auto;
  position: relative;
  z-index: 10;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 1.3rem;
}

.shield-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: pulse-glow 2s infinite;
}

.shield-icon svg {
  width: 22px;
  height: 22px;
  color: white;
}

.shield-icon.small {
  width: 28px;
  height: 28px;
}

.shield-icon.small svg {
  width: 18px;
  height: 18px;
}

@keyframes pulse-glow {
  0%, 100% {
    box-shadow: 0 0 20px var(--accent-glow);
  }
  50% {
    box-shadow: 0 0 40px var(--accent-glow), 0 0 60px rgba(29, 161, 242, 0.2);
  }
}

.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s;
}

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

/* ===== Header / Hero Section ===== */
header {
  min-height: 100vh;
  background:
    radial-gradient(ellipse at 50% 0%, rgba(29, 161, 242, 0.15) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 50%, rgba(0, 212, 170, 0.1) 0%, transparent 40%),
    var(--bg-dark);
  position: relative;
  overflow: hidden;
}

header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--primary), transparent);
}

.hero {
  text-align: center;
  padding: 60px 20px 100px;
  max-width: 900px;
  margin: 0 auto;
  position: relative;
  z-index: 10;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0, 212, 170, 0.1);
  border: 1px solid rgba(0, 212, 170, 0.3);
  padding: 8px 16px;
  border-radius: 50px;
  font-size: 0.85rem;
  color: var(--accent);
  margin-bottom: 24px;
  animation: fadeInUp 0.6s ease-out;
}

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

@keyframes pulse {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.5;
    transform: scale(1.2);
  }
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 24px;
  animation: fadeInUp 0.6s ease-out 0.1s both;
}

.gradient-text {
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 40px;
  animation: fadeInUp 0.6s ease-out 0.2s both;
}

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

/* ===== Buttons ===== */
.hero-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 60px;
  animation: fadeInUp 0.6s ease-out 0.3s both;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: 12px;
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  transition: all 0.3s ease;
  cursor: pointer;
  border: none;
}

.btn svg {
  width: 20px;
  height: 20px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  color: #000;
  box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--accent-glow);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 2px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
  border-color: var(--primary);
  background: rgba(29, 161, 242, 0.1);
}

/* ===== Hero Stats ===== */
.hero-stats {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 40px;
  flex-wrap: wrap;
  animation: fadeInUp 0.6s ease-out 0.4s both;
}

.stat {
  text-align: center;
}

.stat-number {
  display: block;
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-primary);
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: rgba(255, 255, 255, 0.1);
}

/* ===== Features Section ===== */
.features {
  padding: 100px 20px;
  max-width: 1200px;
  margin: 0 auto;
  position: relative;
  z-index: 10;
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-header h2 {
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 700;
  margin-bottom: 16px;
}

.section-header p {
  color: var(--text-secondary);
  font-size: 1.1rem;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 20px;
  padding: 32px;
  transition: all 0.4s ease;
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--primary), transparent);
  opacity: 0;
  transition: opacity 0.4s ease;
}

.feature-card:hover {
  background: var(--bg-card-hover);
  transform: translateY(-8px);
  border-color: rgba(29, 161, 242, 0.3);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-card.featured {
  border-color: rgba(0, 212, 170, 0.3);
  background: linear-gradient(180deg, rgba(0, 212, 170, 0.05), var(--bg-card));
}

.feature-card.featured::before {
  opacity: 1;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
}

.feature-badge {
  position: absolute;
  top: 16px;
  right: 16px;
  background: var(--accent);
  color: #000;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 50px;
  text-transform: uppercase;
}

.feature-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--primary-dark), rgba(29, 161, 242, 0.2));
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  transition: transform 0.4s ease;
}

.feature-card:hover .feature-icon {
  transform: scale(1.1);
}

.feature-icon svg {
  width: 28px;
  height: 28px;
  color: var(--primary);
}

.feature-card h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* ===== Download Section ===== */
.download {
  padding: 100px 20px;
  background: linear-gradient(180deg, transparent, rgba(29, 161, 242, 0.05));
  position: relative;
  z-index: 10;
}

.download-container {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.download-content h2 {
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 700;
  margin-bottom: 16px;
}

.download-content > p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin-bottom: 40px;
}

.download-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.download-btn {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 24px;
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 14px;
  text-decoration: none;
  color: var(--text-primary);
  transition: all 0.3s ease;
}

.download-btn svg {
  width: 32px;
  height: 32px;
}

.download-btn:hover {
  background: var(--bg-card-hover);
  border-color: var(--primary);
  transform: translateY(-4px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.download-btn-text {
  display: flex;
  flex-direction: column;
  text-align: left;
}

.download-btn-text .small {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.download-btn-text .big {
  font-size: 1.1rem;
  font-weight: 600;
}

.download-note {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.download-note svg {
  width: 18px;
  height: 18px;
  color: var(--primary);
}

/* ===== Phone Mockup ===== */
.download-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.phone-mockup {
  width: 280px;
  height: 560px;
  background: #1a1a1a;
  border-radius: 40px;
  padding: 12px;
  border: 3px solid #333;
  box-shadow:
    0 50px 100px rgba(0, 0, 0, 0.5),
    inset 0 0 0 2px rgba(255, 255, 255, 0.05);
  animation: float-phone 6s ease-in-out infinite;
}

@keyframes float-phone {
  0%, 100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-20px);
  }
}

.phone-screen {
  width: 100%;
  height: 100%;
  background: linear-gradient(180deg, var(--primary-dark), var(--bg-dark));
  border-radius: 30px;
  padding: 40px 20px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.app-header {
  font-weight: 700;
  font-size: 1.2rem;
  margin-bottom: 40px;
  color: var(--text-primary);
}

.app-status {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  margin-bottom: 40px;
}

.app-status svg {
  width: 80px;
  height: 80px;
  color: var(--accent);
  animation: pulse-glow 2s infinite;
}

.app-status.secure span {
  color: var(--accent);
  font-weight: 600;
  font-size: 1.1rem;
}

.app-features {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.app-feature {
  background: rgba(255, 255, 255, 0.05);
  padding: 12px 16px;
  border-radius: 10px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  text-align: center;
}

.app-feature.active {
  background: rgba(0, 212, 170, 0.1);
  color: var(--accent);
  border: 1px solid rgba(0, 212, 170, 0.3);
}

/* ===== Footer ===== */
footer {
  padding: 60px 20px;
  background: var(--primary-dark);
  position: relative;
  z-index: 10;
}

footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
}

.footer-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.2rem;
  margin-bottom: 16px;
}

.footer-content > p {
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 32px;
  margin-bottom: 32px;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.3s;
}

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

.copyright {
  color: var(--text-secondary);
  font-size: 0.85rem;
  opacity: 0.7;
}

/* ===== Responsive Design ===== */
@media (max-width: 900px) {
  .download-container {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .download-content {
    order: 1;
  }

  .download-visual {
    order: 2;
  }

  .download-buttons {
    justify-content: center;
  }

  .download-note {
    justify-content: center;
  }
}

@media (max-width: 768px) {
  nav {
    padding: 16px 20px;
    flex-direction: column;
    gap: 16px;
  }

  .hero {
    padding: 40px 20px 60px;
  }

  .hero-stats {
    gap: 20px;
  }

  .stat-divider {
    display: none;
  }

  .features {
    padding: 60px 20px;
  }

  .download {
    padding: 60px 20px;
  }

  .phone-mockup {
    width: 240px;
    height: 480px;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    width: 100%;
    justify-content: center;
    max-width: 280px;
  }

  .download-btn {
    width: 100%;
    justify-content: center;
  }

  .feature-card {
    padding: 24px;
  }
}