:root {
  --navy: #071522;
  --blue: #3d9bd1;
  --light-blue: #9bd7f5;
  --text: #e8eef2;
  --muted: #aabac5;
  --line: rgba(155, 215, 245, 0.25);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--navy);
  color: var(--text);
  font-family: Arial, sans-serif;
  line-height: 1.6;
}

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 7%;
  border-bottom: 1px solid var(--line);
}

.brand {
  color: white;
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  line-height: 1.05;
  text-decoration: none;
}

nav a {
  color: var(--text);
  margin-left: 24px;
  text-decoration: none;
}

nav a:hover {
  color: var(--light-blue);
}

.hero {
  max-width: none;
  position: relative;
  overflow: hidden;
  min-height: 620px;
  display: grid;
  align-items: center;
  padding: 80px 7%;
}

.hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  height: 100%;
  aspect-ratio: 702 / 1174;
  background: url("korah-peptides-ad-clean1.PNG") center / cover no-repeat;
  -webkit-mask-image: linear-gradient(to right, transparent, black 40%);
  mask-image: linear-gradient(to right, transparent, black 40%);
}

.hero-content {
  position: relative;
  max-width: 650px;
}

.eyebrow {
  color: var(--blue);
  font-weight: 700;
  letter-spacing: 0.16em;
}

h1 {
  margin: 12px 0;
  color: var(--light-blue);
  font-size: clamp(2.5rem, 7vw, 5.5rem);
  line-height: 1;
  text-transform: uppercase;
}

h2 {
  color: var(--light-blue);
  font-size: 2rem;
}

h3 {
  color: var(--light-blue);
}

.lead {
  color: var(--text);
  font-size: 1.3rem;
  max-width: 520px;
}

.button {
  display: inline-block;
  margin-top: 20px;
  padding: 14px 25px;
  border-radius: 5px;
  background: var(--blue);
  color: white;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-decoration: none;
  text-transform: uppercase;
}

.button:hover {
  background: #2d83b5;
  color: white;
}

section {
  max-width: 1000px;
  margin: auto;
  padding: 70px 7%;
}

.notice {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: #0b2233;
}

.content-section {
  border-bottom: 1px solid var(--line);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 30px;
}

.feature-card {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.04);
}

.small {
  color: var(--muted);
  font-size: 0.9rem;
}

footer {
  padding: 28px 7%;
  color: var(--muted);
  border-top: 1px solid var(--line);
  text-align: center;
}

@media (max-width: 700px) {
  .site-header {
    display: block;
  }

  nav a {
    display: inline-block;
    margin: 18px 18px 0 0;
  }

  .hero {
    min-height: 560px;
  }

  .hero::before {
    opacity: 0.3;
  }

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