:root {
  --bg-color: #0b0f17;
  --card-bg: #161b26;
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --accent: #3b82f6; /* Azul moderno */
  --accent-hover: #2563eb;
  --border: #1f2937;
}

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

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

/* Tipografía y Utilitarios */
a { text-decoration: none; color: inherit; }
.container { max-width: 1100px; margin: 80px auto; padding: 0 20px; }
.section-title { font-size: 2rem; margin-bottom: 30px; border-left: 4px solid var(--accent); padding-left: 12px; }

/* Navbar */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 40px;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: rgba(11, 15, 23, 0.9);
  backdrop-filter: blur(8px);
  z-index: 100;
}
.logo { font-size: 1.4rem; font-weight: bold; }
.logo span { color: var(--accent); }
.navbar nav a { margin-left: 20px; color: var(--text-muted); transition: 0.3s; }
.navbar nav a:hover { color: var(--text-main); }

/* Hero */
.hero { text-align: center; padding: 100px 20px; max-width: 800px; margin: 0 auto; }
.hero h1 { font-size: 3rem; margin-bottom: 10px; }
.hero h1 span { color: var(--accent); }
.hero h2 { color: var(--text-muted); font-size: 1.5rem; font-weight: 400; margin-bottom: 20px; }
.hero p { font-size: 1.1rem; color: var(--text-muted); margin-bottom: 30px; }

/* Botones */
.btn-primary { background: var(--accent); color: #fff; padding: 12px 24px; border-radius: 6px; display: inline-block; font-weight: 600; border: none; cursor: pointer; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-secondary { border: 1px solid var(--border); padding: 12px 24px; border-radius: 6px; display: inline-block; margin-left: 10px; }

/* Grid de Servicios */
.services-grid, .projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
}
.card, .project-card {
  background: var(--card-bg);
  padding: 30px;
  border-radius: 8px;
  border: 1px solid var(--border);
}
.card h3 { margin-bottom: 10px; color: var(--accent); }

/* Formulario */
.contact-form { display: flex; flex-direction: column; gap: 15px; max-width: 600px; }
.contact-form input, .contact-form textarea {
  background: var(--card-bg);
  border: 1px solid var(--border);
  padding: 14px;
  color: var(--text-main);
  border-radius: 6px;
}