body { font-family: 'Segoe UI', Tahoma, sans-serif; background: #f4f7f6; margin: 0; padding-top: 70px; color: #333; }

/* Navegación Fija */
header { 
    background: #2c3e50; color: white; position: fixed; top: 0; left: 0; width: 100%; height: 60px; 
    display: flex; align-items: center; justify-content: space-between; padding: 0 20px; z-index: 1000; box-shadow: 0 2px 5px rgba(0,0,0,0.2); 
    box-sizing: border-box;
}
header h1 { font-size: 1.2rem; margin: 0; }
nav a { color: #ecf0f1; text-decoration: none; margin-left: 15px; font-weight: 500; font-size: 0.9rem; }
nav a:hover { color: #3498db; }

/* Contenedores */
main { max-width: 900px; margin: 20px auto; padding: 0 10px; }
.card { background: white; padding: 25px; margin-bottom: 25px; border-radius: 8px; box-shadow: 0 2px 4px rgba(0,0,0,0.05); scroll-margin-top: 80px; }
h2 { margin-top: 0; color: #2980b9; border-bottom: 2px solid #eee; padding-bottom: 10px; }

/* Inputs y Botones */
.control-panel, .buttons-area { margin-top: 15px; }
input[type="number"] { padding: 8px; border: 1px solid #ddd; border-radius: 4px; width: 80px; margin-right: 10px; }
button { 
    background: #27ae60; color: white; border: none; padding: 10px 15px; cursor: pointer; border-radius: 4px; font-size: 0.9rem; margin: 5px 2px; transition: background 0.3s; 
}
button:hover { background: #219150; }
.btn-highlight { background: #e67e22; }
.btn-highlight:hover { background: #d35400; }

/* Complejos */
.complex-inputs { display: flex; gap: 20px; flex-wrap: wrap; background: #f8f9fa; padding: 15px; border-radius: 6px; }
.c-group h3 { font-size: 0.9rem; color: #7f8c8d; margin-top: 0; }

/* Salidas */
.output-box { background: #34495e; color: #ecf0f1; padding: 15px; border-radius: 4px; margin-top: 15px; font-family: monospace; white-space: pre-wrap; }
canvas { width: 100%; border: 1px solid #ddd; border-radius: 4px; background: #fff; margin-top: 15px; }
#map { height: 400px; width: 100%; background: #eee; border-radius: 4px; }