:root {
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --bg-dark: #0f172a;
  --card-bg: #1e293b;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --border: #334155;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

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

/* Header & Nav */
header {
  background: rgba(15, 23, 42, 0.95);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: #fff;
  text-decoration: none;
}

.logo span { color: var(--primary); }

nav ul {
  display: flex;
  list-style: none;
  gap: 1.5rem;
}

nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}

nav a:hover, nav a.active {
  color: var(--primary);
}

/* Hero Section */
.hero {
  max-width: 1200px;
  margin: 0 auto;
  padding: 5rem 2rem;
  text-align: center;
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.hero p {
  color: var(--text-muted);
  font-size: 1.25rem;
  max-width: 700px;
  margin: 0 auto 2rem auto;
}

.btn {
  display: inline-block;
  background: var(--primary);
  color: white;
  padding: 0.75rem 1.75rem;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 600;
  transition: background 0.2s;
  border: none;
  cursor: pointer;
}

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

/* Layout Grid */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 4rem 2rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  padding: 2rem;
  border-radius: 8px;
  transition: transform 0.2s;
}

.card:hover { transform: translateY(-4px); }
.card h3 { margin-bottom: 1rem; }
.card p { color: var(--text-muted); margin-bottom: 1.5rem; }

/* Contact Form */
.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--text-muted);
}

.form-group input, .form-group textarea {
  width: 100%;
  padding: 0.75rem;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: white;
}

.form-group input:focus, .form-group textarea:focus {
  outline: 1px solid var(--primary);
}

/* Footer */
footer {
  border-top: 1px solid var(--border);
  padding: 2rem;
  text-align: center;
  color: var(--text-muted);
  margin-top: 4rem;
}