:root {
  --bg: #05080f;
  --surface: #0d1422;
  --surface-strong: #111d31;
  --text: #e7ecf3;
  --muted: #9ab0c7;
  --primary: #1ba6ff;
  --primary-strong: #0077c7;
  --accent: #dca14a;
  --border: #243b58;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 18% 12%, rgba(27, 166, 255, 0.16), transparent 34%),
    radial-gradient(circle at 86% 8%, rgba(220, 161, 74, 0.16), transparent 32%),
    linear-gradient(180deg, #04070e 0%, var(--bg) 260px);
  line-height: 1.5;
}

.container {
  width: min(980px, 92%);
  margin: 0 auto;
}

.site-header {
  background: rgba(7, 13, 24, 0.9);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  backdrop-filter: blur(6px);
  z-index: 10;
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 0;
}

.brand {
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
}

.brand-logo {
  display: block;
  height: 56px;
  width: auto;
}

.brand-name {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: #f6fbff;
  text-shadow: 0 0 18px rgba(27, 166, 255, 0.28);
}

nav {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

nav a {
  color: var(--muted);
  text-decoration: none;
  padding: 0.4rem 0.6rem;
  border-radius: 0.35rem;
}

nav a.active,
nav a:hover {
  color: #f7fbff;
  background: rgba(0, 119, 199, 0.5);
}

.hero {
  padding: 4rem 0 2.5rem;
}

.hero h1 {
  margin: 0 0 0.8rem;
  font-size: clamp(1.85rem, 5vw, 3rem);
}

.hero p {
  margin: 0;
  max-width: 64ch;
  color: var(--muted);
}

h1,
h2 {
  color: #f8fbff;
}

.button-row {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.35rem;
  flex-wrap: wrap;
}

.btn {
  text-decoration: none;
  background: var(--primary);
  color: #f8fdff;
  padding: 0.65rem 1rem;
  border-radius: 0.5rem;
  font-weight: 600;
  box-shadow: 0 0 0 1px rgba(27, 166, 255, 0.3) inset;
}

.btn:hover {
  background: var(--primary-strong);
}

.btn-outline {
  background: transparent;
  color: var(--accent);
  border: 1px solid rgba(220, 161, 74, 0.8);
}

.section {
  padding: 2rem 0 3rem;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.card {
  background: linear-gradient(180deg, var(--surface) 0%, var(--surface-strong) 100%);
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  padding: 1rem;
}

.card-with-image {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-areas:
    "copy image"
    "release release";
  align-items: start;
  gap: 1rem;
}

.card-copy {
  grid-area: copy;
  min-width: 0;
}

.card h2,
.card h3 {
  margin: 0 0 0.4rem;
  color: var(--accent);
}

.card p {
  margin: 0;
  color: var(--muted);
}

.card p.release-note {
  grid-area: release;
  margin-top: 0.75rem;
  text-align: center;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--accent);
}

.card-image-wrap {
  grid-area: image;
  margin: 0;
}

.card-image {
  display: block;
  width: clamp(120px, 22vw, 170px);
  height: auto;
}

.clean-list {
  padding-left: 1.15rem;
}

.card ul.clean-list {
  margin-left: 0.5em;
  color: var(--muted);
}

.clean-list li {
  margin-bottom: 0.55rem;
}

.site-footer {
  border-top: 1px solid var(--border);
  background: rgba(8, 13, 22, 0.88);
  color: var(--muted);
}

.site-footer p {
  margin: 0;
  padding: 1rem 0;
  font-size: 0.95rem;
}

@media (max-width: 640px) {
  .nav-wrap {
    flex-direction: column;
    align-items: flex-start;
  }

  .brand-logo {
    height: 46px;
  }

  .brand-name {
    font-size: 1.05rem;
  }

  .card-image {
    width: clamp(105px, 36vw, 145px);
  }

  .card-with-image {
    grid-template-columns: 1fr;
    grid-template-areas:
      "image"
      "copy"
      "release";
    gap: 0.8rem;
  }

  .card-image-wrap {
    justify-self: end;
  }
}