:root {
  --bg: #0f172a;
  --card: #111827;
  --panel: #0b1225;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --purple: #a855f7;
  --blue: #38bdf8;
  --pink: #fb7185;
  --accent: linear-gradient(135deg, #a855f7, #38bdf8);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Poppins', 'Segoe UI', Tahoma, sans-serif;
  background: radial-gradient(circle at 20% 20%, rgba(88, 28, 135, 0.2), transparent 25%),
    radial-gradient(circle at 80% 0%, rgba(56, 189, 248, 0.2), transparent 25%),
    var(--bg);
  color: var(--text);
  min-height: 100vh;
}

a {
  color: inherit;
}

nav {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2.5rem;
  backdrop-filter: blur(10px);
  background: rgba(17, 24, 39, 0.7);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.logo img {
  height: 44px;
  display: block;
  object-fit: contain;
}

.menu {
  display: flex;
  gap: 0.8rem;
  align-items: center;
}

.menu a {
  text-decoration: none;
  color: var(--muted);
  font-weight: 500;
  padding: 0.35rem 0.8rem;
  border-radius: 999px;
  transition: all 0.2s ease;
}

.menu a:hover,
.menu a.active {
  color: var(--text);
  background: rgba(168, 85, 247, 0.18);
  border: 1px solid rgba(168, 85, 247, 0.4);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.65rem 1.1rem;
  border-radius: 12px;
  text-decoration: none;
  font-weight: 600;
  color: var(--text);
  border: 1px solid rgba(168, 85, 247, 0.4);
  background: rgba(17, 24, 39, 0.8);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border 0.2s;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.25);
}

.btn-primary {
  background: var(--accent);
  color: #0b1225;
  border: none;
  box-shadow: 0 14px 35px rgba(88, 28, 135, 0.35);
}

.site-footer {
  background: var(--bg);
  color: var(--text);
  margin-top: 2rem;
  padding: 2.5rem 1.5rem 2rem;
  font-family: 'Poppins', 'Segoe UI', Tahoma, sans-serif;
}

.site-footer .footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1.2rem 2rem;
  align-items: start;
  max-width: 1200px;
  margin: 0 auto;
}

.site-footer .brand h3 {
  margin: 0 0 0.4rem;
  font-size: 1.15rem;
}

.site-footer ul {
  list-style: none;
  padding: 0;
  margin: 0.4rem 0 0;
}

.site-footer li {
  margin: 0.25rem 0;
  color: #9ca3af;
}

.site-footer h4 {
  margin: 0;
  font-size: 1rem;
  color: var(--text);
}

.site-footer .bottom-bar {
  max-width: 1200px;
  margin: 1.8rem auto 0;
  padding-top: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  color: #9ca3af;
}

.site-footer .social {
  display: flex;
  gap: 0.5rem;
}

.site-footer .social span {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--accent);
  color: #0b1225;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  font-weight: 700;
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.25);
}

@media (max-width: 700px) {
  nav {
    padding: 0.9rem 1.2rem;
  }
}