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

body {
  font-family:
    system-ui, "Segoe UI", "Helvetica Neue", Helvetica, "Noto Sans", sans-serif;
  line-height: 1.5;
  color: #1f2a1e;
  background-color: #2b3b1f;
}

/* background layer with white semi-transparent overlay */
.hero-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -2;
  object-fit: cover;
}

.overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(255, 255, 240, 0.75);
  z-index: -1;
}

/* main container */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

/* header navigation */
header {
  padding: 28px 0 20px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid rgba(100, 130, 60, 0.3);
}

.logo {
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, #b9d43c, #6b8c2e);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

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

.nav-links a {
  text-decoration: none;
  font-weight: 600;
  color: #2c4424;
  transition: color 0.2s;
  font-size: 1rem;
}

.nav-links a:hover {
  color: #7caf2a;
  border-bottom: 2px solid #7caf2a;
  padding-bottom: 4px;
}

/* banner section */
.banner {
  padding: 80px 0 100px;
  text-align: center;
}

.banner h1 {
  font-size: 3.8rem;
  font-weight: 800;
  background: linear-gradient(145deg, #5c8a2c, #c8e07c);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 24px;
  letter-spacing: -1px;
}

.banner p {
  font-size: 1.3rem;
  max-width: 700px;
  margin: 0 auto;
  color: #2b4720;
  font-weight: 500;
  background: rgba(255, 255, 245, 0.5);
  backdrop-filter: blur(2px);
  padding: 12px 24px;
  border-radius: 48px;
  display: inline-block;
}

/* section common */
section {
  padding: 70px 0 60px;
  scroll-margin-top: 90px;
}

.section-title {
  text-align: center;
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 60px;
  color: #3a6028;
  position: relative;
  display: inline-block;
  width: 100%;
}

.section-title:after {
  content: "";
  display: block;
  width: 70px;
  height: 4px;
  background: #b3d95a;
  margin: 12px auto 0;
  border-radius: 4px;
}

/* feature rows: left-right alternating */
.feature-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 48px;
  margin-bottom: 80px;
}

.feature-row:last-child {
  margin-bottom: 0;
}

.feature-text {
  flex: 1;
  min-width: 260px;
}

.feature-text h3 {
  font-size: 1.9rem;
  font-weight: 700;
  margin-bottom: 20px;
  color: #466a2e;
}

.feature-text p {
  font-size: 1.05rem;
  color: #2c3e24;
  margin-bottom: 16px;
  line-height: 1.5;
}

.feature-img {
  flex: 1;
  display: flex;
  justify-content: center;
  min-width: 240px;
}

.feature-img img {
  max-width: 100%;
  width: 280px;
  border-radius: 36px;
  box-shadow: 0 25px 40px -12px rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(160, 200, 90, 0.5);
  transition: transform 0.3s ease;
}

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

/* alternating order: left text right image default, then reverse on even rows */
.feature-row.reverse {
  flex-direction: row-reverse;
}

/* screenshot section (optional) */
.screenshot-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 32px;
  margin-top: 30px;
}

.screenshot-card {
  background: rgba(255, 253, 230, 0.7);
  backdrop-filter: blur(2px);
  border-radius: 40px;
  padding: 20px 20px 20px;
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.05);
  transition: all 0.25s;
  width: 220px;
  text-align: center;
}

.screenshot-card img {
  width: 100%;
  border-radius: 28px;
  box-shadow: 0 12px 20px rgba(0, 0, 0, 0.1);
  border: 2px solid #e6f0cf;
}

.screenshot-card p {
  margin-top: 16px;
  font-weight: 500;
  color: #527a34;
}

/* footer */
footer {
  background: rgba(45, 65, 30, 0.85);
  backdrop-filter: blur(8px);
  padding: 40px 0 24px;
  margin-top: 40px;
  border-top-left-radius: 32px;
  border-top-right-radius: 32px;
  color: #f8fbed;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
}

.footer-nav {
  display: flex;
  gap: 28px;
  flex-wrap: wrap;
}

.footer-nav a {
  color: #e9f5d9;
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}

.footer-nav a:hover {
  color: #c6ef7c;
}

.contact-email {
  font-size: 1rem;
  letter-spacing: 0.3px;
}

.contact-email a {
  color: #dcf5a6;
  text-decoration: none;
  font-weight: 500;
  border-bottom: 1px dotted #b8df72;
}

.copyright {
  text-align: center;
  margin-top: 32px;
  font-size: 0.8rem;
  opacity: 0.8;
  border-top: 1px solid rgba(190, 210, 140, 0.3);
  padding-top: 24px;
}

/* responsive */
@media (max-width: 768px) {
  .container {
    padding: 0 20px;
  }
  .banner h1 {
    font-size: 2.5rem;
  }
  .banner p {
    font-size: 1rem;
  }
  .section-title {
    font-size: 2rem;
  }
  .feature-row,
  .feature-row.reverse {
    flex-direction: column;
    text-align: center;
    gap: 28px;
  }
  .feature-text h3 {
    font-size: 1.6rem;
  }
  .feature-img img {
    width: 240px;
  }
  .nav-links {
    gap: 1rem;
    margin-top: 12px;
  }
  header {
    flex-direction: column;
    gap: 16px;
  }
  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
  .footer-nav {
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .banner {
    padding: 50px 0 70px;
  }
  section {
    padding: 50px 0 40px;
  }
}

/* smooth scroll */
html {
  scroll-behavior: smooth;
}