:root {
  --bg: #0b1020;
  --card: #121832;
  --ink: #e8ecf8;
  --muted: #a9b4d4;
  --accent: #6aa3ff;
  --accent2: #ff5e8a;
  --red: #d62828;
  --radius: 18px;
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
}

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

body {
  font-family: 'Inter', system-ui, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  opacity: 0.85;
}

header {
  position: sticky;
  top: 0;
  background: rgba(11, 16, 32, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding: 12px 20px;
  z-index: 10;
}

.wrap {
  max-width: 960px;
  margin: 0 auto;
  padding: 32px 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
}

.brand .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
}

nav {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
}

nav a {
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--ink);
}

nav .btn-red {
  background: var(--red);
  color: white;
  font-weight: 600;
  border: none;
  padding: 8px 16px;
  border-radius: 999px;
  box-shadow: var(--shadow);
}

.hero {
  text-align: center;
  padding: 60px 16px 40px;
}

h1 {
  font-size: clamp(28px, 6vw, 42px);
  margin-bottom: 12px;
}

h2 {
  font-size: 26px;
  margin-bottom: 8px;
}

h3 {
  font-size: 20px;
  margin-bottom: 6px;
}

p {
  font-size: 16px;
  margin-bottom: 12px;
  color: var(--ink);
}

.lede {
  max-width: 60ch;
  margin: 0 auto;
  color: var(--muted);
  font-size: 18px;
}

.btn {
  display: inline-block;
  margin-top: 20px;
  padding: 14px 20px;
  border-radius: 12px;
  font-weight: 600;
  background: var(--accent);
  color: #fff;
  box-shadow: var(--shadow);
  transition: background 0.2s ease;
}

.btn:hover {
  background: #4c8cd9;
}

section {
  padding: 40px 0;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.card {
  background: var(--card);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
}

footer {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 24px 0;
  text-align: center;
  color: var(--muted);
  font-size: 14px;
}


/* -----------------------------------
   📱 Mobile Optimization
----------------------------------- */
@media (max-width: 600px) {
  header {
    padding: 10px 16px;
  }

  .wrap {
    padding: 24px 16px;
  }

  nav {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  nav a,
  nav .btn-red {
    width: 100%;
    text-align: center;
    font-size: 15px;
    padding: 10px 12px;
  }

  .hero {
    padding: 40px 16px 30px;
  }

  .btn {
    display: block;
    width: 100%;
    padding: 14px;
    font-size: 16px;
  }

  h1 {
    font-size: 24px;
    line-height: 1.35;
  }

  h2 {
    font-size: 22px;
  }

  h3 {
    font-size: 18px;
  }

  .grid {
    grid-template-columns: 1fr !important;
  }

  footer {
    font-size: 13px;
    line-height: 1.5;
    padding: 20px 16px;
  }

  footer a {
    display: inline-block;
    word-break: break-word;
  }
}