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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  color: #e0e0e0;
  background: #000;
}

/* Header */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1.5rem 0;
  transition: padding 0.3s ease, background 0.3s ease;
  background: transparent;
  border-bottom: 1px solid transparent;
}

header.sticky {
  background: rgba(0, 0, 0, 0.95);
  padding: 0.75rem 0;
  backdrop-filter: blur(10px);
  border-bottom-color: #1a1a1a;
}

.header-inner {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

header img {
  max-width: 180px;
  height: auto;
}

header a img {
  max-width: 180px;
  height: auto;
}

.tagline {
  color: #aaa;
  font-size: 0.85rem;
  flex: 1;
  text-align: center;
}

header nav {
  display: flex;
  gap: 1.5rem;
}

header nav a {
  color: #aaa;
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s;
}

header nav a:hover,
header nav a.active {
  color: #fff;
}

/* Main */
main {
  max-width: 900px;
  margin: 0 auto;
  padding: 6rem 2rem 2rem;
}

/* Hero */
.hero {
  text-align: center;
  padding: 4rem 0 3rem;
}

.hero h1 {
  font-size: 2.5rem;
  color: #fff;
  margin-bottom: 1rem;
}

.hero .subtitle {
  color: #aaa;
  font-size: 1.1rem;
}

/* Card */
.card {
  background: #111;
  padding: 2.5rem;
  border-radius: 12px;
  border: 1px solid #1a1a1a;
  margin-bottom: 1rem;
}

.card h1 {
  font-size: 2rem;
  color: #fff;
  margin-bottom: 1.5rem;
}

.card h2 {
  font-size: 1.3rem;
  color: #fff;
  margin: 1.5rem 0 0.75rem;
}

.card p {
  margin-bottom: 0.75rem;
}

/* Links */
a {
  color: #4da3ff;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* Small text */
.small {
  font-size: 0.8rem;
  color: #666;
}

/* Partner */
.partner {
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid #1a1a1a;
  text-align: center;
  color: #666;
  font-size: 0.8rem;
}

.partner img {
  max-width: 120px;
  height: auto;
  display: block;
  margin: 0 auto 0.25rem;
}

/* Footer */
footer {
  text-align: center;
  padding: 1.5rem 2rem 1rem;
  color: #555;
  font-size: 0.8rem;
}

/* Mobile */
@media (max-width: 700px) {
  .header-inner {
    flex-wrap: wrap;
    gap: 0.75rem;
  }

  .tagline {
    order: 3;
    width: 100%;
    font-size: 0.8rem;
  }

  header img,
  header a img {
    max-width: 140px;
  }

  main {
    padding: 7rem 1rem 3rem;
  }

  .hero h1 {
    font-size: 1.8rem;
  }

  .card {
    padding: 1.5rem;
  }
}