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

body {
  font-family:
    system-ui,
    "Segoe UI",
    "Inter",
    -apple-system,
    BlinkMacSystemFont,
    "Helvetica Neue",
    sans-serif;
  background: #0a0f1f;
  color: #1e1f2c;
  line-height: 1.5;
  scroll-behavior: smooth;
}

/* background image + overlay (white to skyblue semi-transparent) */
.bg-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -2;
  background-image: url("https://images.unsplash.com/photo-1534438327276-14e5300c3a48?q=80&w=2070&auto=format");
  background-size: cover;
  background-position: center 30%;
  background-repeat: no-repeat;
}

.bg-overlay::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    135deg,
    rgba(255, 255, 255, 0.65) 0%,
    rgba(135, 206, 250, 0.45) 100%
  );
  backdrop-filter: brightness(1.02);
  z-index: -1;
}

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

/* header nav */
.navbar {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  padding: 24px 0 20px;
  border-bottom: 1px solid rgba(94, 84, 142, 0.2);
}

.logo {
  font-size: 1.9rem;
  font-weight: 800;
  background: linear-gradient(135deg, #6a3de8, #b47cff);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  font-weight: 600;
  color: #2d2a4e;
  transition: 0.2s;
  font-size: 1rem;
}

.nav-links a:hover {
  color: #6a3de8;
  border-bottom: 2px solid #6a3de8;
  padding-bottom: 4px;
}

/* sections common */
section {
  padding: 80px 0;
  border-bottom: 1px solid rgba(100, 80, 160, 0.2);
}

.section-title {
  font-size: 2.6rem;
  font-weight: 700;
  background: linear-gradient(125deg, #3b1e8c, #a45cff);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 2rem;
  letter-spacing: -0.01em;
}

/* banner */
.banner {
  min-height: 85vh;
  display: flex;
  align-items: center;
  padding: 40px 0;
}

.banner-grid {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 48px;
}

.banner-text {
  flex: 1.2;
}

.banner-text h1 {
  font-size: 3.8rem;
  font-weight: 800;
  background: linear-gradient(135deg, #4c2bc2, #9966ff);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  line-height: 1.2;
  margin-bottom: 20px;
}

.tagline {
  font-size: 1.4rem;
  font-weight: 500;
  color: #2a2352;
  margin-bottom: 20px;
}

.desc {
  font-size: 1.1rem;
  color: #1f1b38;
  max-width: 90%;
  margin-top: 16px;
}

.banner-image {
  flex: 0.9;
  display: flex;
  justify-content: center;
}

.mockup-img {
  max-width: 280px;
  width: 100%;
  border-radius: 44px;
  box-shadow: 0 30px 40px -20px rgba(0, 0, 0, 0.4);
  border: 3px solid rgba(255, 255, 240, 0.7);
  transition: transform 0.2s ease;
}

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

/* intro & features flexible */
.features-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  margin-top: 2rem;
}

.feature-card {
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(8px);
  border-radius: 2rem;
  padding: 1.8rem;
  flex: 1 1 280px;
  transition: all 0.25s;
  border: 1px solid rgba(180, 130, 255, 0.4);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.02);
}

.feature-card:hover {
  background: rgba(255, 255, 255, 0.9);
  border-color: #aa7eff;
  transform: translateY(-6px);
}

.feature-icon {
  font-size: 2.4rem;
  margin-bottom: 1rem;
}

.feature-card h3 {
  font-size: 1.6rem;
  background: linear-gradient(145deg, #5f3adc, #b77eff);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 0.75rem;
}

.feature-card p {
  color: #2c284b;
}

.split-section {
  display: flex;
  flex-wrap: wrap;
  gap: 48px;
  align-items: center;
  margin: 48px 0 24px;
}

.split-text {
  flex: 1;
}

.split-text h3 {
  font-size: 1.9rem;
  font-weight: 700;
  background: linear-gradient(120deg, #4b2cb0, #b07cff);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 1rem;
}

.split-text p {
  color: #252043;
  font-size: 1rem;
  margin-bottom: 1rem;
}

.split-media {
  flex: 1;
  display: flex;
  justify-content: center;
}

.screenshot-stack {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
}

.screenshot-item {
  max-width: 200px;
  border-radius: 32px;
  box-shadow: 0 20px 30px -12px rgba(0, 0, 0, 0.25);
  transition: all 0.3s;
  border: 2px solid white;
}

.screenshot-item:hover {
  transform: scale(1.02);
}

/* message board & community style */
.community-highlight {
  background: rgba(255, 248, 255, 0.7);
  backdrop-filter: blur(4px);
  border-radius: 40px;
  padding: 2rem;
  margin: 2rem 0;
  border: 1px solid rgba(150, 100, 240, 0.4);
}

/* footer */
footer {
  padding: 48px 0 32px;
  text-align: center;
  color: #2c2850;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.footer-links a {
  text-decoration: none;
  color: #4a3680;
  font-weight: 500;
}

.footer-links a:hover {
  color: #6a3de8;
}

.contact-email {
  font-size: 1rem;
  margin: 1rem 0;
  font-weight: 500;
}

hr {
  max-width: 120px;
  margin: 20px auto;
  border-color: #cbb2ff;
}

/* mobile responsiveness */
@media (max-width: 900px) {
  .container {
    padding: 0 24px;
  }
  .navbar {
    flex-direction: column;
    gap: 18px;
  }
  .banner-text h1 {
    font-size: 2.4rem;
  }
  .tagline {
    font-size: 1.2rem;
  }
  .section-title {
    font-size: 2rem;
  }
  .banner-grid {
    flex-direction: column-reverse;
    text-align: center;
  }
  .desc {
    max-width: 100%;
  }
  .split-section {
    flex-direction: column;
    text-align: center;
  }
  .feature-card {
    text-align: center;
  }
  .mockup-img {
    max-width: 220px;
  }
  .screenshot-item {
    max-width: 150px;
  }
}

@media (max-width: 550px) {
  .nav-links {
    gap: 1.2rem;
    justify-content: center;
  }
  .feature-card {
    flex: 1 1 100%;
  }
  .screenshot-item {
    max-width: 130px;
  }
}

/* utility */
img {
  display: block;
  width: 100%;
  height: auto;
}

a {
  cursor: pointer;
}