/* Base styles and CSS variables */
:root {
  --color-primary: #265299;
  --color-primary-light: #3a6bbf;
  --color-accent: #4a7fd4;
  --color-dark: #1a1a1a;
  --color-light: #ffffff;
  --color-gray: #737380;
  --color-gray-light: #f2f2f7;
  --gradient-hero: linear-gradient(
    135deg,
    #1a3d6e 0%,
    #265299 50%,
    #4a7fd4 100%
  );
  --gradient-card: linear-gradient(
    180deg,
    rgba(38, 82, 153, 0.1) 0%,
    rgba(38, 82, 153, 0.05) 100%
  );
  --font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    sans-serif;
  --border-radius: 16px;
  --border-radius-lg: 24px;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.12);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.15);
  --transition: all 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  line-height: 1.6;
  color: var(--color-dark);
  background: var(--color-light);
  overflow-x: hidden;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Typography */
h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

p {
  color: var(--color-gray);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: 50px;
  transition: var(--transition);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--color-dark);
  color: var(--color-light);
}

.btn-primary:hover {
  background: #2a2a4a;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn.btn-download {
  background: var(--color-primary);
  color: var(--color-light);
  padding: 10px 20px;
  font-size: 0.9rem;
}

.btn.btn-download:hover {
  background: #1e4580;
  color: var(--color-light);
}

.btn-large {
  padding: 18px 36px;
  font-size: 1.1rem;
}

.apple-icon {
  width: 20px;
  height: 20px;
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-dark);
  text-decoration: none;
}

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

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

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

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-dark);
  transition: var(--transition);
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 72px;
  background: var(--gradient-hero);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.hero-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 50%;
  padding: 80px 0;
}

.hero h1 {
  color: var(--color-light);
  margin-bottom: 16px;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.hero-subtitle {
  font-size: 1.5rem;
  color: rgba(255, 255, 255, 0.95);
  margin-bottom: 16px;
  font-weight: 500;
}

.hero-description {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 32px;
  line-height: 1.7;
}

.hero-visual {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: center;
  padding-left: 40px;
}

/* Hero Phone Image */
.hero-phone-img {
  max-height: 600px;
  width: auto;
  border-radius: 40px;
  animation: float 4s ease-in-out infinite;
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

/* Features Section */
.features {
  padding: 120px 0;
  background: var(--color-light);
}

.features h2 {
  text-align: center;
  margin-bottom: 60px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.feature-card {
  background: var(--color-gray-light);
  border-radius: var(--border-radius-lg);
  padding: 40px 32px;
  text-align: center;
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-md);
}

.feature-icon {
  font-size: 3rem;
  margin-bottom: 20px;
  display: block;
}

.feature-card h3 {
  color: var(--color-dark);
  margin-bottom: 12px;
}

.feature-card p {
  font-size: 0.95rem;
  line-height: 1.6;
}

/* CTA Section */
.cta {
  padding: 120px 0;
  background: var(--gradient-hero);
  text-align: center;
}

.cta h2 {
  color: var(--color-light);
  margin-bottom: 16px;
}

.cta p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.2rem;
  margin-bottom: 32px;
}

.cta .btn-primary {
  background: var(--color-light);
  color: var(--color-dark);
}

.cta .btn-primary:hover {
  background: #f0f0f0;
}

/* Footer */
.footer {
  background: var(--color-dark);
  color: var(--color-light);
  padding: 60px 0 30px;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 40px;
}

.footer-brand .logo {
  color: var(--color-light);
  display: block;
  margin-bottom: 8px;
}

.footer-brand p {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.9rem;
}

.footer-links {
  display: flex;
  gap: 32px;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
  text-align: center;
}

.footer-bottom p {
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.85rem;
}

/* Responsive Design */
@media (max-width: 968px) {
  .hero-container {
    flex-direction: column;
    justify-content: center;
    text-align: center;
  }

  .hero-visual {
    padding-left: 0;
    margin-top: 40px;
  }

  .hero-content {
    max-width: 100%;
    padding: 40px 0 20px;
  }

  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--color-light);
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    box-shadow: var(--shadow-md);
  }

  .nav-links.active {
    display: flex;
  }

  .mobile-menu-btn {
    display: flex;
  }

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

  .footer-content {
    flex-direction: column;
    gap: 32px;
    text-align: center;
  }

  .footer-links {
    justify-content: center;
  }
}