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

body {
  font-family:
    system-ui,
    -apple-system,
    "Segoe UI",
    "Helvetica Neue",
    Helvetica,
    "Inter",
    sans-serif;
  line-height: 1.5;
  color: #1e2a3e;
  scroll-behavior: smooth;
}

/* Background with network-style image + skyblue overlay */
.bg-layer {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -2;
  background-image: url("https://images.pexels.com/photos/1714208/pexels-photo-1714208.jpeg?auto=compress&cs=tinysrgb&w=1600");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.bg-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  background: linear-gradient(
    135deg,
    rgba(135, 206, 250, 0.55) 0%,
    rgba(255, 255, 255, 0.85) 100%
  );
  backdrop-filter: blur(2px);
}

/* main container */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px;
}

/* header navigation */
.header {
  padding: 24px 0 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.5);
}

.logo {
  font-size: 1.9rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #1e88e5, #70c8ff);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: 0 2px 5px rgba(255, 255, 255, 0.3);
}

.nav-links {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
}

.nav-links a {
  text-decoration: none;
  font-weight: 600;
  color: #1e4663;
  transition: 0.2s;
  font-size: 1rem;
  padding-bottom: 4px;
  border-bottom: 2px solid transparent;
}

.nav-links a:hover {
  color: #0b5e8a;
  border-bottom-color: #2897e0;
}

/* common section spacing */
.section {
  padding: 80px 0;
  border-bottom: 1px solid rgba(255, 255, 240, 0.4);
}

.section:last-of-type {
  border-bottom: none;
}

/* banner */
.banner {
  min-height: 85vh;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 40px;
}

.banner-content {
  flex: 1.2;
}

.banner-content h1 {
  font-size: 3.8rem;
  font-weight: 800;
  line-height: 1.2;
  background: linear-gradient(to right, #0b4980, #4fa3e0);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 20px;
}

.tagline {
  font-size: 1.6rem;
  font-weight: 500;
  color: #2c5a82;
  margin-bottom: 24px;
  letter-spacing: -0.2px;
}

.banner-desc {
  font-size: 1.2rem;
  color: #1f3e54;
  max-width: 550px;
  backdrop-filter: blur(4px);
  background: rgba(255, 255, 245, 0.25);
  padding: 12px 20px;
  border-radius: 48px;
}

.banner-media {
  flex: 0.8;
  display: flex;
  justify-content: center;
}

.mockup-phone {
  max-width: 280px;
  width: 100%;
  border-radius: 36px;
  box-shadow: 0 25px 45px -12px rgba(0, 0, 0, 0.35);
  transition: transform 0.3s ease;
}

.mockup-phone:hover {
  transform: scale(1.02);
}

/* intro & features split into two columns + visual card style */
.section-title {
  font-size: 2.4rem;
  font-weight: 700;
  margin-bottom: 48px;
  text-align: center;
  background: linear-gradient(120deg, #1f6390, #9bc9ff);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.split-layout {
  display: flex;
  flex-wrap: wrap;
  gap: 48px;
  align-items: flex-start;
}

.intro-block {
  flex: 1;
  background: rgba(255, 255, 255, 0.3);
  backdrop-filter: blur(8px);
  border-radius: 42px;
  padding: 32px 28px;
  box-shadow: 0 20px 35px -15px rgba(0, 0, 0, 0.1);
  transition: all 0.2s;
}

.features-block {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.feature-card {
  background: rgba(255, 255, 252, 0.5);
  backdrop-filter: blur(5px);
  border-radius: 32px;
  padding: 24px 28px;
  transition:
    transform 0.2s,
    background 0.2s;
  border: 1px solid rgba(255, 255, 255, 0.6);
}

.feature-card:hover {
  background: rgba(255, 255, 245, 0.75);
  transform: translateY(-4px);
}

.feature-card h3 {
  font-size: 1.7rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: #1f5e8c;
}

.feature-card p {
  color: #1f3a44;
  font-size: 1rem;
}

.intro-block p {
  font-size: 1.15rem;
  margin-bottom: 20px;
  line-height: 1.5;
  color: #1b3447;
}

.highlight-em {
  font-weight: 600;
  color: #0c6b9e;
}

/* screenshot section optional but we keep it elegant */
.screenshot {
  background: rgba(245, 250, 255, 0.25);
  border-radius: 64px;
  margin: 20px 0;
}

.screenshot-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 32px;
  margin-top: 40px;
}

.screenshot-card {
  flex: 1;
  min-width: 200px;
  max-width: 240px;
  background: rgba(255, 255, 250, 0.6);
  backdrop-filter: blur(4px);
  border-radius: 36px;
  padding: 20px 12px 16px;
  text-align: center;
  transition: 0.2s;
}

.screenshot-card img {
  width: 100%;
  border-radius: 28px;
  box-shadow: 0 12px 24px -12px rgba(0, 0, 0, 0.2);
  margin-bottom: 12px;
}

.screenshot-card p {
  font-weight: 500;
  color: #22638b;
}

/* footer section */
.footer {
  padding: 48px 0 40px;
  text-align: center;
  border-top: 1px solid rgba(255, 255, 245, 0.6);
  margin-top: 20px;
}

.footer-nav {
  display: flex;
  justify-content: center;
  gap: 2.5rem;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

.footer-nav a {
  text-decoration: none;
  color: #205b82;
  font-weight: 500;
  transition: color 0.2s;
}

.footer-nav a:hover {
  color: #0a3f5e;
  text-decoration: underline;
}

.contact-info {
  font-size: 1rem;
  margin-bottom: 12px;
  color: #1d4e72;
}

.copyright {
  font-size: 0.85rem;
  color: #2b5f83;
  letter-spacing: 0.3px;
}

/* responsive */
@media (max-width: 880px) {
  .container {
    padding: 0 24px;
  }
  .banner-content h1 {
    font-size: 2.6rem;
  }
  .tagline {
    font-size: 1.3rem;
  }
  .section {
    padding: 56px 0;
  }
  .split-layout {
    flex-direction: column;
  }
  .intro-block,
  .features-block {
    width: 100%;
  }
  .banner {
    flex-direction: column-reverse;
    text-align: center;
  }
  .banner-desc {
    margin-left: auto;
    margin-right: auto;
  }
  .section-title {
    font-size: 2rem;
  }
}

@media (max-width: 560px) {
  .header {
    flex-direction: column;
    text-align: center;
  }
  .nav-links {
    justify-content: center;
  }
  .mockup-phone {
    max-width: 220px;
  }
  .feature-card h3 {
    font-size: 1.4rem;
  }
  .screenshot-card {
    min-width: 160px;
  }
}

/* extra small */
.rounded-full {
  border-radius: 999px;
}
img {
  display: block;
  max-width: 100%;
}