:root {
  --bg: #0f172a;
  --surface: #111827;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --accent: #22c55e;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Inter", system-ui, sans-serif;
}

body {
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.container {
  max-width: 1100px;
  margin: auto;
  padding: 0 20px;
}

.center {
  text-align: center;
}

/* Header */
.header {
  position: fixed;
  width: 100%;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(10px);
  z-index: 1000;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.brand {
  font-weight: 700;
  font-size: 1.1rem;
  text-align: center;
}

.menu {
  display: flex;
  gap: 24px;
}

.menu a {
  color: var(--muted);
  text-decoration: none;
}

.menu a:hover {
  color: var(--text);
}

.menu-btn {
  display: none;
  background: none;
  border: none;
}

.menu-btn span {
  width: 24px;
  height: 2px;
  background: white;
  display: block;
  margin: 5px 0;
}

/* Hero */
.hero {
  min-height: 100vh;
  display: grid;
  place-items: center;
  text-align: center;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.2rem);
}

.hero p {
  margin: 20px 0;
  color: var(--muted);
}

.cta {
  display: inline-block;
  padding: 14px 28px;
  background: var(--accent);
  color: #e5ebe8;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
}

/* Sections */
.section {
  padding: 100px 0;
}

/* About */
.about {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 40px;
  align-items: center;
}

.about img {
  width: 200px;
  border-radius: 50%;
}

/* Services */
.services {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  margin-top: 40px;
}

.services article {
  background-color: #182238;
  padding: 32px;
  border-radius: 16px;
  transition: transform 0.3s;
}

.services article:hover {
  transform: translateY(-6px);
}

/* Contact */
.contact p {
  margin-top: 10px;
  color: var(--muted);
}

/* Footer */
.footer {
  padding: 30px;
  text-align: center;
  color: var(--muted);
}

/* Mobile */
@media (max-width: 768px) {
  .menu {
    display: none;
  }

  .menu-btn {
    display: block;
  }

  .about {
    grid-template-columns: 1fr;
    text-align: center;
  }
}